4XK8

Crystal structure of plant photosystem I-LHCI super-complex at 2.8 angstrom resolution

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Membrane Protein Annotation: OPM
Membrane Protein Annotation: PDBTM
Membrane Protein Annotation: MemProtMD

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d4xk8a_	Membrane and cell surface proteins and peptides	Photosystem I subunits PsaA/PsaB	Photosystem I subunits PsaA/PsaB	Photosystem I subunits PsaA/PsaB	automated matches	Garden pea (Pisum sativum ) [TaxId: 3888 ],	SCOPe (2.08)
J	d4xk8j_	Membrane and cell surface proteins and peptides	Single transmembrane helix	Subunit IX of photosystem I reaction centre, PsaJ	automated matches	automated matches	Garden pea (Pisum sativum ) [TaxId: 3888 ],	SCOPe (2.08)
M [auth 1]	d4xk81_	Membrane and cell surface proteins and peptides	Chlorophyll a-b binding protein	Chlorophyll a-b binding protein	automated matches	automated matches	Garden pea (Pisum sativum ) [TaxId: 3888 ],	SCOPe (2.08)
CA [auth 6]	d4xk86_	Membrane and cell surface proteins and peptides	Chlorophyll a-b binding protein	Chlorophyll a-b binding protein	automated matches	automated matches	Garden pea (Pisum sativum ) [TaxId: 3888 ],	SCOPe (2.08)
DA [auth 7]	d4xk87_	Membrane and cell surface proteins and peptides	Chlorophyll a-b binding protein	Chlorophyll a-b binding protein	automated matches	automated matches	Garden pea (Pisum sativum ) [TaxId: 3888 ],	SCOPe (2.08)
N [auth 2]	d4xk82_	Membrane and cell surface proteins and peptides	Chlorophyll a-b binding protein	Chlorophyll a-b binding protein	automated matches	automated matches	Garden pea (Pisum sativum ) [TaxId: 3888 ],	SCOPe (2.08)
O [auth 3]	d4xk83_	Membrane and cell surface proteins and peptides	Chlorophyll a-b binding protein	Chlorophyll a-b binding protein	automated matches	automated matches	Garden pea (Pisum sativum ) [TaxId: 3888 ],	SCOPe (2.08)
EA [auth 8]	d4xk88_	Membrane and cell surface proteins and peptides	Chlorophyll a-b binding protein	Chlorophyll a-b binding protein	automated matches	automated matches	Garden pea (Pisum sativum ) [TaxId: 3888 ],	SCOPe (2.08)
FA [auth 9]	d4xk89_	Membrane and cell surface proteins and peptides	Chlorophyll a-b binding protein	Chlorophyll a-b binding protein	automated matches	automated matches	Garden pea (Pisum sativum ) [TaxId: 3888 ],	SCOPe (2.08)
P [auth 4]	d4xk84_	Membrane and cell surface proteins and peptides	Chlorophyll a-b binding protein	Chlorophyll a-b binding protein	automated matches	automated matches	Garden pea (Pisum sativum ) [TaxId: 3888 ],	SCOPe (2.08)
B	d4xk8b_	Membrane and cell surface proteins and peptides	Photosystem I subunits PsaA/PsaB	Photosystem I subunits PsaA/PsaB	Photosystem I subunits PsaA/PsaB	automated matches	Garden pea (Pisum sativum ) [TaxId: 3888 ],	SCOPe (2.08)
C	d4xk8c_	Alpha and beta proteins (a+b)	Ferredoxin-like	4Fe-4S ferredoxins	7-Fe ferredoxin	automated matches	Garden pea (Pisum sativum ) [TaxId: 3888 ],	SCOPe (2.08)
D	d4xk8d_	Alpha and beta proteins (a+b)	Photosystem I subunit PsaD	Photosystem I subunit PsaD	Photosystem I subunit PsaD	automated matches	Garden pea (Pisum sativum ) [TaxId: 3888 ],	SCOPe (2.08)
E	d4xk8e_	All beta proteins	SH3-like barrel	Electron transport accessory proteins	automated matches	automated matches	Garden pea (Pisum sativum ) [TaxId: 3888 ],	SCOPe (2.08)
F	d4xk8f_	Membrane and cell surface proteins and peptides	Single transmembrane helix	Subunit III of photosystem I reaction centre, PsaF	automated matches	automated matches	Garden pea (Pisum sativum ) [TaxId: 3888 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Photosystem I subunits PsaA/PsaB	8074458	3000850	SCOP2B (2022-06-29)
Q [auth a]	SCOP2B Superfamily	Photosystem I subunits PsaA/PsaB	8074458	3000850	SCOP2B (2022-06-29)
J	SCOP2B Superfamily	Subunit IX of photosystem I reaction centre, PsaJ	8097086	3000824	SCOP2B (2022-06-29)
Z [auth j]	SCOP2 Family	Subunit IX of photosystem I reaction centre, PsaJ	8097085	4002101	SCOP2 (2022-06-29)
Z [auth j]	SCOP2 Superfamily	Subunit IX of photosystem I reaction centre, PsaJ	8097086	3000824	SCOP2 (2022-06-29)
BA [auth l]	SCOP2B Superfamily	Photosystem I reaction center subunit XI, PsaL	8087174	3000870	SCOP2B (2022-06-29)
L	SCOP2 Family	Photosystem I reaction center subunit XI, PsaL	8087173	4002135	SCOP2 (2022-06-29)
L	SCOP2 Superfamily	Photosystem I reaction center subunit XI, PsaL	8087174	3000870	SCOP2 (2022-06-29)
M [auth 1]	SCOP2 Family	Chlorophyll a-b binding protein	8076985	4001763	SCOP2 (2022-06-29)
M [auth 1]	SCOP2 Superfamily	Chlorophyll a-b binding protein	8076986	3000343	SCOP2 (2022-06-29)
CA [auth 6]	SCOP2B Superfamily	Chlorophyll a-b binding protein	8076986	3000343	SCOP2B (2022-06-29)
DA [auth 7]	SCOP2B Superfamily	Chlorophyll a-b binding protein	8076998	3000343	SCOP2B (2022-06-29)
N [auth 2]	SCOP2 Family	Chlorophyll a-b binding protein	8076997	4001763	SCOP2 (2022-06-29)
N [auth 2]	SCOP2 Superfamily	Chlorophyll a-b binding protein	8076998	3000343	SCOP2 (2022-06-29)
O [auth 3]	SCOP2B Superfamily	Chlorophyll a-b binding protein	8076994	3000343	SCOP2B (2022-06-29)
EA [auth 8]	SCOP2B Superfamily	Chlorophyll a-b binding protein	8076994	3000343	SCOP2B (2022-06-29)
FA [auth 9]	SCOP2B Superfamily	Chlorophyll a-b binding protein	8077000	3000343	SCOP2B (2022-06-29)
P [auth 4]	SCOP2B Superfamily	Chlorophyll a-b binding protein	8077000	3000343	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Photosystem I subunits PsaA/PsaB	8074470	3000850	SCOP2B (2022-06-29)
R [auth b]	SCOP2B Superfamily	Photosystem I subunits PsaA/PsaB	8074470	3000850	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	4Fe-4S ferredoxins	8074478	3000020	SCOP2B (2022-06-29)
S [auth c]	SCOP2B Superfamily	4Fe-4S ferredoxins	8074478	3000020	SCOP2B (2022-06-29)
T [auth d]	SCOP2B Superfamily	Photosystem I subunit PsaD	8074484	3000951	SCOP2B (2022-06-29)
D	SCOP2 Family	Photosystem I subunit PsaD	8074483	4003498	SCOP2 (2022-06-29)
D	SCOP2 Superfamily	Photosystem I subunit PsaD	8074484	3000951	SCOP2 (2022-06-29)
E	SCOP2 Family	Photosystem I accessory protein E (PsaE)	8074497	4001749	SCOP2 (2022-06-29)
E	SCOP2 Superfamily	Electron transport accessory proteins	8074498	3000325	SCOP2 (2022-06-29)
U [auth e]	SCOP2B Superfamily	Electron transport accessory proteins	8074498	3000325	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	Subunit III of photosystem I reaction centre, PsaF	8074446	3000813	SCOP2B (2022-06-29)
V [auth f]	SCOP2B Superfamily	Subunit III of photosystem I reaction centre, PsaF	8074446	3000813	SCOP2B (2022-06-29)
X [auth h]	SCOP2 Family	Photosystem I reaction centre subunit VI	8051254	4007266	SCOP2 (2022-06-29)
X [auth h]	SCOP2 Superfamily	Photosystem I reaction centre subunit VI	8102526	3002733	SCOP2 (2022-06-29)
H	SCOP2B Superfamily	Photosystem I reaction centre subunit VI	8102526	3002733	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PsaA_PsaB_C	e4xk8A2	A: alpha bundles	X: Bacterial photosystem II reaction centre L and M subunits-like (From Topology)	H: Bacterial photosystem II reaction centre L and M subunits-like (From Topology)	T: Bacterial photosystem II reaction centre L and M subunits-like	F: PsaA_PsaB_C	ECOD (1.6)
A	PsaA_PsaB_N	e4xk8A1	A: alpha bundles	X: Photosystem II antenna protein-like (From Topology)	H: Photosystem II antenna protein-like (From Topology)	T: Photosystem II antenna protein-like	F: PsaA_PsaB_N	ECOD (1.6)
Q [auth a]	PsaA_PsaB_C	e4xk8a1	A: alpha bundles	X: Bacterial photosystem II reaction centre L and M subunits-like (From Topology)	H: Bacterial photosystem II reaction centre L and M subunits-like (From Topology)	T: Bacterial photosystem II reaction centre L and M subunits-like	F: PsaA_PsaB_C	ECOD (1.6)
Q [auth a]	PsaA_PsaB_N	e4xk8a2	A: alpha bundles	X: Photosystem II antenna protein-like (From Topology)	H: Photosystem II antenna protein-like (From Topology)	T: Photosystem II antenna protein-like	F: PsaA_PsaB_N	ECOD (1.6)
J	PSI_PsaJ	e4xk8J1	A: extended segments	X: Subunit IX of photosystem I reaction centre, PsaJ (From Topology)	H: Subunit IX of photosystem I reaction centre, PsaJ (From Topology)	T: Subunit IX of photosystem I reaction centre, PsaJ	F: PSI_PsaJ	ECOD (1.6)
Z [auth j]	PSI_PsaJ	e4xk8j1	A: extended segments	X: Subunit IX of photosystem I reaction centre, PsaJ (From Topology)	H: Subunit IX of photosystem I reaction centre, PsaJ (From Topology)	T: Subunit IX of photosystem I reaction centre, PsaJ	F: PSI_PsaJ	ECOD (1.6)
K	PSI_PSAK	e4xk8K1	A: alpha bundles	X: Photosystem I reaction center subunit X, PsaK (From Topology)	H: Photosystem I reaction center subunit X, PsaK (From Topology)	T: Photosystem I reaction center subunit X, PsaK	F: PSI_PSAK	ECOD (1.6)
AA [auth k]	PSI_PSAK	e4xk8k1	A: alpha bundles	X: Photosystem I reaction center subunit X, PsaK (From Topology)	H: Photosystem I reaction center subunit X, PsaK (From Topology)	T: Photosystem I reaction center subunit X, PsaK	F: PSI_PSAK	ECOD (1.6)
BA [auth l]	PsaL	e4xk8l1	A: alpha bundles	X: Photosystem I reaction center subunit XI, PsaL (From Topology)	H: Photosystem I reaction center subunit XI, PsaL (From Topology)	T: Photosystem I reaction center subunit XI, PsaL	F: PsaL	ECOD (1.6)
L	PsaL	e4xk8L1	A: alpha bundles	X: Photosystem I reaction center subunit XI, PsaL (From Topology)	H: Photosystem I reaction center subunit XI, PsaL (From Topology)	T: Photosystem I reaction center subunit XI, PsaL	F: PsaL	ECOD (1.6)
M [auth 1]	Chloroa_b-bind	e4xk811	A: extended segments	X: Chlorophyll a-b binding protein (From Topology)	H: Chlorophyll a-b binding protein (From Topology)	T: Chlorophyll a-b binding protein	F: Chloroa_b-bind	ECOD (1.6)
CA [auth 6]	Chloroa_b-bind	e4xk861	A: extended segments	X: Chlorophyll a-b binding protein (From Topology)	H: Chlorophyll a-b binding protein (From Topology)	T: Chlorophyll a-b binding protein	F: Chloroa_b-bind	ECOD (1.6)
DA [auth 7]	Chloroa_b-bind	e4xk871	A: extended segments	X: Chlorophyll a-b binding protein (From Topology)	H: Chlorophyll a-b binding protein (From Topology)	T: Chlorophyll a-b binding protein	F: Chloroa_b-bind	ECOD (1.6)
N [auth 2]	Chloroa_b-bind	e4xk821	A: extended segments	X: Chlorophyll a-b binding protein (From Topology)	H: Chlorophyll a-b binding protein (From Topology)	T: Chlorophyll a-b binding protein	F: Chloroa_b-bind	ECOD (1.6)
O [auth 3]	Chloroa_b-bind	e4xk831	A: extended segments	X: Chlorophyll a-b binding protein (From Topology)	H: Chlorophyll a-b binding protein (From Topology)	T: Chlorophyll a-b binding protein	F: Chloroa_b-bind	ECOD (1.6)
EA [auth 8]	Chloroa_b-bind	e4xk881	A: extended segments	X: Chlorophyll a-b binding protein (From Topology)	H: Chlorophyll a-b binding protein (From Topology)	T: Chlorophyll a-b binding protein	F: Chloroa_b-bind	ECOD (1.6)
FA [auth 9]	Chloroa_b-bind	e4xk891	A: extended segments	X: Chlorophyll a-b binding protein (From Topology)	H: Chlorophyll a-b binding protein (From Topology)	T: Chlorophyll a-b binding protein	F: Chloroa_b-bind	ECOD (1.6)
P [auth 4]	Chloroa_b-bind	e4xk841	A: extended segments	X: Chlorophyll a-b binding protein (From Topology)	H: Chlorophyll a-b binding protein (From Topology)	T: Chlorophyll a-b binding protein	F: Chloroa_b-bind	ECOD (1.6)
B	PsaA_PsaB_C	e4xk8B1	A: alpha bundles	X: Bacterial photosystem II reaction centre L and M subunits-like (From Topology)	H: Bacterial photosystem II reaction centre L and M subunits-like (From Topology)	T: Bacterial photosystem II reaction centre L and M subunits-like	F: PsaA_PsaB_C	ECOD (1.6)
B	PsaA_PsaB_N	e4xk8B2	A: alpha bundles	X: Photosystem II antenna protein-like (From Topology)	H: Photosystem II antenna protein-like (From Topology)	T: Photosystem II antenna protein-like	F: PsaA_PsaB_N	ECOD (1.6)
R [auth b]	PsaA_PsaB_C	e4xk8b2	A: alpha bundles	X: Bacterial photosystem II reaction centre L and M subunits-like (From Topology)	H: Bacterial photosystem II reaction centre L and M subunits-like (From Topology)	T: Bacterial photosystem II reaction centre L and M subunits-like	F: PsaA_PsaB_C	ECOD (1.6)
R [auth b]	PsaA_PsaB_N	e4xk8b1	A: alpha bundles	X: Photosystem II antenna protein-like (From Topology)	H: Photosystem II antenna protein-like (From Topology)	T: Photosystem II antenna protein-like	F: PsaA_PsaB_N	ECOD (1.6)
C	Fer4_21_1	e4xk8C1	A: a+b two layers	X: 4Fe-4S ferredoxin (From Topology)	H: 4Fe-4S ferredoxin (From Topology)	T: 4Fe-4S ferredoxin	F: Fer4_21_1	ECOD (1.6)
S [auth c]	Fer4_21_1	e4xk8c1	A: a+b two layers	X: 4Fe-4S ferredoxin (From Topology)	H: 4Fe-4S ferredoxin (From Topology)	T: 4Fe-4S ferredoxin	F: Fer4_21_1	ECOD (1.6)
T [auth d]	PsaD	e4xk8d1	A: a+b two layers	X: Photosystem I subunit PsaD (From Topology)	H: Photosystem I subunit PsaD (From Topology)	T: Photosystem I subunit PsaD	F: PsaD	ECOD (1.6)
D	PsaD	e4xk8D1	A: a+b two layers	X: Photosystem I subunit PsaD (From Topology)	H: Photosystem I subunit PsaD (From Topology)	T: Photosystem I subunit PsaD	F: PsaD	ECOD (1.6)
E	PSI_PsaE	e4xk8E1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: PSI_PsaE	ECOD (1.6)
U [auth e]	PSI_PsaE	e4xk8e1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: PSI_PsaE	ECOD (1.6)
F	PSI_PsaF	e4xk8F1	A: extended segments	X: Subunit III of photosystem I reaction centre, PsaF (From Topology)	H: Subunit III of photosystem I reaction centre, PsaF (From Topology)	T: Subunit III of photosystem I reaction centre, PsaF	F: PSI_PsaF	ECOD (1.6)
V [auth f]	PSI_PsaF	e4xk8f1	A: extended segments	X: Subunit III of photosystem I reaction centre, PsaF (From Topology)	H: Subunit III of photosystem I reaction centre, PsaF (From Topology)	T: Subunit III of photosystem I reaction centre, PsaF	F: PSI_PsaF	ECOD (1.6)
W [auth g]	PSI_PSAK	e4xk8g1	A: alpha bundles	X: Photosystem I reaction center subunit X, PsaK (From Topology)	H: Photosystem I reaction center subunit X, PsaK (From Topology)	T: Photosystem I reaction center subunit X, PsaK	F: PSI_PSAK	ECOD (1.6)
G	PSI_PSAK	e4xk8G1	A: alpha bundles	X: Photosystem I reaction center subunit X, PsaK (From Topology)	H: Photosystem I reaction center subunit X, PsaK (From Topology)	T: Photosystem I reaction center subunit X, PsaK	F: PSI_PSAK	ECOD (1.6)
X [auth h]	PSI_PsaH	e4xk8h1	A: extended segments	X: Subunit VI of Photosystem I reaction centre (From Topology)	H: Subunit VI of Photosystem I reaction centre (From Topology)	T: Subunit VI of Photosystem I reaction centre	F: PSI_PsaH	ECOD (1.6)
H	PSI_PsaH	e4xk8H1	A: extended segments	X: Subunit VI of Photosystem I reaction centre (From Topology)	H: Subunit VI of Photosystem I reaction centre (From Topology)	T: Subunit VI of Photosystem I reaction centre	F: PSI_PsaH	ECOD (1.6)
I	PSI_8	e4xk8I1	A: extended segments	X: Subunit VIII of photosystem I reaction centre, PsaI (From Topology)	H: Subunit VIII of photosystem I reaction centre, PsaI (From Topology)	T: Subunit VIII of photosystem I reaction centre, PsaI	F: PSI_8	ECOD (1.6)
Y [auth i]	PSI_8	e4xk8i1	A: extended segments	X: Subunit VIII of photosystem I reaction centre, PsaI (From Topology)	H: Subunit VIII of photosystem I reaction centre, PsaI (From Topology)	T: Subunit VIII of photosystem I reaction centre, PsaI	F: PSI_8	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.20.1130.10	Mainly Alpha	Up-down Bundle	Photosystem I p700 chlorophyll A apoprotein A1	Photosystem I PsaA/PsaB	CATH (4.3.0)
Q [auth a]	1.20.1130.10	Mainly Alpha	Up-down Bundle	Photosystem I p700 chlorophyll A apoprotein A1	Photosystem I PsaA/PsaB	CATH (4.3.0)
BA [auth l]	1.20.1240.10	Mainly Alpha	Up-down Bundle	Photosystem 1 Reaction Centre Subunit Xi	Chain: L	CATH (4.3.0)
L	1.20.1240.10	Mainly Alpha	Up-down Bundle	Photosystem 1 Reaction Centre Subunit Xi	Chain: L	CATH (4.3.0)
B	1.20.1130.10	Mainly Alpha	Up-down Bundle	Photosystem I p700 chlorophyll A apoprotein A1	Photosystem I PsaA/PsaB	CATH (4.3.0)
R [auth b]	1.20.1130.10	Mainly Alpha	Up-down Bundle	Photosystem I p700 chlorophyll A apoprotein A1	Photosystem I PsaA/PsaB	CATH (4.3.0)
C	3.30.70.20	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits		CATH (4.3.0)
S [auth c]	3.30.70.20	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits		CATH (4.3.0)
T [auth d]	3.30.1470.10	Alpha Beta	2-Layer Sandwich	Photosystem 1 Reaction Centre Subunit Ii	Chain: D	CATH (4.3.0)
D	3.30.1470.10	Alpha Beta	2-Layer Sandwich	Photosystem 1 Reaction Centre Subunit Ii	Chain: D	CATH (4.3.0)
E	2.30.30.50	Mainly Beta	Roll	SH3 type barrels.		CATH (4.3.0)
U [auth e]	2.30.30.50	Mainly Beta	Roll	SH3 type barrels.		CATH (4.3.0)
F	1.10.8.110	Mainly Alpha	Orthogonal Bundle	Helicase, Ruva Protein	domain 3	CATH (4.3.0)
V [auth f]	1.10.8.110	Mainly Alpha	Orthogonal Bundle	Helicase, Ruva Protein	domain 3	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, Q [auth a]	PF00223	Photosystem I psaA/psaB protein (PsaA_PsaB)	Photosystem I psaA/psaB protein	-	Family
J, Z [auth j]	PF01701	Photosystem I reaction centre subunit IX / PsaJ (PSI_PsaJ)	Photosystem I reaction centre subunit IX / PsaJ	-	Family
AA [auth k], K	PF01241	Photosystem I psaG / psaK (PSI_PSAK)	Photosystem I psaG / psaK	-	Family
BA [auth l], L	PF02605	Photosystem I reaction centre subunit XI (PsaL)	Photosystem I reaction centre subunit XI	-	Family
CA [auth 6], M [auth 1]	PF00504	Chlorophyll A-B binding protein (Chloroa_b-bind)	Chlorophyll A-B binding protein	-	Family
DA [auth 7], N [auth 2]	PF00504	Chlorophyll A-B binding protein (Chloroa_b-bind)	Chlorophyll A-B binding protein	-	Family
EA [auth 8], O [auth 3]	PF00504	Chlorophyll A-B binding protein (Chloroa_b-bind)	Chlorophyll A-B binding protein	-	Family
FA [auth 9], P [auth 4]	PF00504	Chlorophyll A-B binding protein (Chloroa_b-bind)	Chlorophyll A-B binding protein	-	Family
B, R [auth b]	PF00223	Photosystem I psaA/psaB protein (PsaA_PsaB)	Photosystem I psaA/psaB protein	-	Family
C, S [auth c]	PF14697	4Fe-4S dicluster domain (Fer4_21)	4Fe-4S dicluster domain	Superfamily includes proteins containing domains which bind to iron-sulfur clusters. Members include bacterial ferredoxins, various dehydrogenases, and various reductases. Structure of the domain is an alpha-antiparallel beta sandwich. Domain contai ...	Superfamily includes proteins containing domains which bind to iron-sulfur clusters. Members include bacterial ferredoxins, various dehydrogenases, and various reductases. Structure of the domain is an alpha-antiparallel beta sandwich. Domain contains two 4Fe4S clusters.	Domain
D, T [auth d]	PF02531	PsaD (PsaD)	PsaD	-	Family
E, U [auth e]	PF02427	Photosystem I reaction centre subunit IV / PsaE (PSI_PsaE)	Photosystem I reaction centre subunit IV / PsaE	PsaE is a 69 amino acid polypeptide from photosystem I present on the stromal side of the thylakoid membrane [1]. The structure is comprised of a well-defined five-stranded beta-sheet similar to SH3 domains [1].	Domain
F, V [auth f]	PF02507	Photosystem I reaction centre subunit III (PSI_PsaF)	Photosystem I reaction centre subunit III	-	Family
G, W [auth g]	PF01241	Photosystem I psaG / psaK (PSI_PSAK)	Photosystem I psaG / psaK	-	Family
H, X [auth h]	PF03244	Photosystem I reaction centre subunit VI (PSI_PsaH)	Photosystem I reaction centre subunit VI	-	Family
I, Y [auth i]	PF00796	Photosystem I reaction centre subunit VIII (PSI_8)	Photosystem I reaction centre subunit VIII	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, Q [auth a]	Photosystem I P700 chlorophyll a apoprotein A1	cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding oxidoreductase activity catalytic activity iron-sulfur cluster binding 4 iron, 4 sulfur cluster binding metal cluster binding chlorophyll binding organic cyclic compound binding tetrapyrrole binding cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding oxidoreductase activity catalytic activity iron-sulfur cluster binding 4 iron, 4 sulfur cluster binding metal cluster binding chlorophyll binding organic cyclic compound binding tetrapyrrole binding electron transfer activity	photosynthesis metabolic process cellular process	chloroplast thylakoid membrane membrane-bounded organelle plastid membrane intracellular anatomical structure plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid intracellular organelle organelle envelope cellular anatomical structure bounding membrane of organelle membraneless organelle thylakoid chloroplast thylakoid membrane membrane-bounded organelle plastid membrane intracellular anatomical structure plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid intracellular organelle organelle envelope cellular anatomical structure bounding membrane of organelle membraneless organelle thylakoid plastid envelope chloroplast membrane intracellular membraneless organelle intracellular membrane-bounded organelle thylakoid membrane organelle chloroplast thylakoid outer membrane cytoplasm photosynthetic membrane organelle membrane protein-containing complex photosystem photosystem I membrane protein complex
J, Z [auth j]	Photosystem I reaction center subunit IX	-	photosynthesis metabolic process cellular process	chloroplast thylakoid membrane membrane-bounded organelle plastid membrane intracellular anatomical structure plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid intracellular organelle organelle envelope cellular anatomical structure bounding membrane of organelle membraneless organelle thylakoid chloroplast thylakoid membrane membrane-bounded organelle plastid membrane intracellular anatomical structure plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid intracellular organelle organelle envelope cellular anatomical structure bounding membrane of organelle membraneless organelle thylakoid plastid envelope chloroplast membrane intracellular membraneless organelle intracellular membrane-bounded organelle thylakoid membrane organelle chloroplast thylakoid outer membrane cytoplasm photosynthetic membrane organelle membrane protein-containing complex photosystem photosystem I membrane protein complex
AA [auth k], K	Photosystem I reaction center subunit X psaK	-	photosynthesis metabolic process cellular process	protein-containing complex photosystem intracellular anatomical structure photosystem I membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid membrane-bounded organelle protein-containing complex photosystem intracellular anatomical structure photosystem I membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid membrane-bounded organelle plastid cytoplasm intracellular membrane-bounded organelle chloroplast
BA [auth l], L	Putative uncharacterized protein	-	photosynthesis metabolic process cellular process	protein-containing complex photosystem intracellular anatomical structure photosystem I membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane photosystem I reaction center thylakoid
CA [auth 6], M [auth 1]	Chlorophyll a-b binding protein 6, chloroplastic	protein binding binding protein domain specific binding RNA binding organic cyclic compound binding nucleic acid binding mRNA binding chlorophyll binding tetrapyrrole binding cation binding ion binding metal ion binding small molecule binding	response to stimulus response to stress response to abiotic stimulus response to cold response to temperature stimulus response to light stimulus response to light intensity response to radiation response to high light intensity response to low light intensity stimulus photosynthesis, light harvesting in photosystem I photosynthesis photosynthesis, light reaction photosynthesis, light harvesting response to stimulus response to stress response to abiotic stimulus response to cold response to temperature stimulus response to light stimulus response to light intensity response to radiation response to high light intensity response to low light intensity stimulus photosynthesis, light harvesting in photosystem I photosynthesis photosynthesis, light reaction photosynthesis, light harvesting metabolic process cellular process generation of precursor metabolites and energy	chloroplast thylakoid membrane membrane-bounded organelle plastid membrane intracellular anatomical structure plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid intracellular organelle organelle envelope cellular anatomical structure bounding membrane of organelle membraneless organelle thylakoid chloroplast thylakoid membrane membrane-bounded organelle plastid membrane intracellular anatomical structure plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid intracellular organelle organelle envelope cellular anatomical structure bounding membrane of organelle membraneless organelle thylakoid plastid envelope chloroplast membrane intracellular membraneless organelle intracellular membrane-bounded organelle thylakoid membrane organelle chloroplast thylakoid outer membrane cytoplasm photosynthetic membrane organelle membrane protein-containing complex photosystem photosystem I membrane protein complex plastoglobule plastid stroma chloroplast stroma chloroplast envelope
DA [auth 7], N [auth 2]	Type II chlorophyll a/b binding protein from photosystem I	chlorophyll binding binding organic cyclic compound binding tetrapyrrole binding	response to light stimulus response to stimulus response to radiation response to abiotic stimulus photosynthesis, light harvesting in photosystem I photosynthesis photosynthesis, light reaction photosynthesis, light harvesting metabolic process cellular process generation of precursor metabolites and energy	protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid chloroplast thylakoid membrane protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid chloroplast thylakoid membrane membrane-bounded organelle plastid membrane plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid organelle envelope bounding membrane of organelle plastid envelope chloroplast intracellular membrane-bounded organelle thylakoid membrane chloroplast thylakoid outer membrane cytoplasm organelle membrane photosystem I
EA [auth 8], O [auth 3]	Chlorophyll a-b binding protein 3, chloroplastic	chlorophyll binding binding organic cyclic compound binding tetrapyrrole binding cation binding ion binding metal ion binding small molecule binding	response to light stimulus response to stimulus response to radiation response to abiotic stimulus photosynthesis, light harvesting in photosystem I photosynthesis photosynthesis, light reaction photosynthesis, light harvesting metabolic process cellular process generation of precursor metabolites and energy	protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid membrane-bounded organelle protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid membrane-bounded organelle plastid intracellular membrane-bounded organelle plastoglobule plastid stroma chloroplast stroma cytoplasm chloroplast chloroplast thylakoid membrane plastid membrane organelle outer membrane plastid thylakoid membrane plastid thylakoid organelle envelope bounding membrane of organelle plastid envelope thylakoid membrane chloroplast thylakoid outer membrane organelle membrane photosystem I
FA [auth 9], P [auth 4]	Chlorophyll a-b binding protein P4, chloroplastic	chlorophyll binding binding organic cyclic compound binding tetrapyrrole binding cation binding ion binding metal ion binding small molecule binding	photosynthesis photosynthesis, light reaction photosynthesis, light harvesting metabolic process cellular process generation of precursor metabolites and energy	protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid chloroplast thylakoid membrane protein-containing complex photosystem intracellular anatomical structure photosystem II membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane thylakoid chloroplast thylakoid membrane membrane-bounded organelle plastid membrane plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid organelle envelope bounding membrane of organelle plastid envelope chloroplast intracellular membrane-bounded organelle thylakoid membrane chloroplast thylakoid outer membrane cytoplasm organelle membrane photosystem I
B, R [auth b]	Photosystem I P700 chlorophyll a apoprotein A2	cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding oxidoreductase activity catalytic activity iron-sulfur cluster binding 4 iron, 4 sulfur cluster binding metal cluster binding chlorophyll binding organic cyclic compound binding tetrapyrrole binding cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding oxidoreductase activity catalytic activity iron-sulfur cluster binding 4 iron, 4 sulfur cluster binding metal cluster binding chlorophyll binding organic cyclic compound binding tetrapyrrole binding electron transfer activity	photosynthesis metabolic process cellular process	chloroplast thylakoid membrane membrane-bounded organelle plastid membrane intracellular anatomical structure plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid intracellular organelle organelle envelope cellular anatomical structure bounding membrane of organelle membraneless organelle thylakoid chloroplast thylakoid membrane membrane-bounded organelle plastid membrane intracellular anatomical structure plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid intracellular organelle organelle envelope cellular anatomical structure bounding membrane of organelle membraneless organelle thylakoid plastid envelope chloroplast membrane intracellular membraneless organelle intracellular membrane-bounded organelle thylakoid membrane organelle chloroplast thylakoid outer membrane cytoplasm photosynthetic membrane organelle membrane protein-containing complex photosystem photosystem I membrane protein complex
C, S [auth c]	Photosystem I iron-sulfur center	oxidoreductase activity catalytic activity iron-sulfur cluster binding binding 4 iron, 4 sulfur cluster binding metal cluster binding small molecule binding electron transfer activity cation binding ion binding metal ion binding	photosynthesis photosynthesis, light reaction photosynthetic electron transport chain electron transport chain metabolic process cellular process generation of precursor metabolites and energy photosynthetic electron transport in photosystem I	chloroplast thylakoid membrane membrane-bounded organelle plastid membrane intracellular anatomical structure plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid intracellular organelle organelle envelope cellular anatomical structure bounding membrane of organelle membraneless organelle thylakoid chloroplast thylakoid membrane membrane-bounded organelle plastid membrane intracellular anatomical structure plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid intracellular organelle organelle envelope cellular anatomical structure bounding membrane of organelle membraneless organelle thylakoid plastid envelope chloroplast membrane intracellular membraneless organelle intracellular membrane-bounded organelle thylakoid membrane organelle chloroplast thylakoid outer membrane cytoplasm photosynthetic membrane organelle membrane protein-containing complex photosystem photosystem I membrane protein complex
D, T [auth d]	Uncharacterized protein	-	photosynthesis metabolic process cellular process	protein-containing complex photosystem intracellular anatomical structure photosystem I membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane photosystem I reaction center thylakoid protein-containing complex photosystem intracellular anatomical structure photosystem I membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane photosystem I reaction center thylakoid chloroplast thylakoid membrane membrane-bounded organelle plastid membrane plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid organelle envelope bounding membrane of organelle plastid envelope chloroplast intracellular membrane-bounded organelle thylakoid membrane chloroplast thylakoid outer membrane cytoplasm organelle membrane
E, U [auth e]	Putative uncharacterized protein	-	photosynthesis metabolic process cellular process	protein-containing complex photosystem intracellular anatomical structure photosystem I membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane photosystem I reaction center thylakoid protein-containing complex photosystem intracellular anatomical structure photosystem I membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane photosystem I reaction center thylakoid chloroplast thylakoid membrane membrane-bounded organelle plastid membrane plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid organelle envelope bounding membrane of organelle plastid envelope chloroplast intracellular membrane-bounded organelle thylakoid membrane chloroplast thylakoid outer membrane cytoplasm organelle membrane
F, V [auth f]	Photosystem I reaction center subunit III, chloroplastic	phosphoprotein binding protein binding binding	photosynthesis metabolic process cellular process	protein-containing complex photosystem intracellular anatomical structure photosystem I membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane photosystem I reaction center thylakoid protein-containing complex photosystem intracellular anatomical structure photosystem I membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane photosystem I reaction center thylakoid membrane-bounded organelle plastid intracellular membrane-bounded organelle plastid thylakoid plastid thylakoid lumen chloroplast thylakoid lumen chloroplast thylakoid cytoplasm thylakoid lumen chloroplast
G, W [auth g]	Photosystem I reaction center subunit V, chloroplastic	-	photosynthesis metabolic process cellular process	chloroplast thylakoid membrane membrane-bounded organelle plastid membrane intracellular anatomical structure plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid intracellular organelle organelle envelope cellular anatomical structure bounding membrane of organelle membraneless organelle thylakoid chloroplast thylakoid membrane membrane-bounded organelle plastid membrane intracellular anatomical structure plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid intracellular organelle organelle envelope cellular anatomical structure bounding membrane of organelle membraneless organelle thylakoid plastid envelope chloroplast membrane intracellular membraneless organelle intracellular membrane-bounded organelle thylakoid membrane organelle chloroplast thylakoid outer membrane cytoplasm photosynthetic membrane organelle membrane protein-containing complex photosystem photosystem I membrane protein complex
H, X [auth h]	Putative uncharacterized protein	-	photosynthesis metabolic process cellular process	protein-containing complex photosystem intracellular anatomical structure photosystem I membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane photosystem I reaction center thylakoid protein-containing complex photosystem intracellular anatomical structure photosystem I membrane membrane protein complex intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle photosynthetic membrane photosystem I reaction center thylakoid chloroplast thylakoid membrane membrane-bounded organelle plastid membrane plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid organelle envelope bounding membrane of organelle plastid envelope chloroplast intracellular membrane-bounded organelle thylakoid membrane chloroplast thylakoid outer membrane cytoplasm organelle membrane
I, Y [auth i]	Photosystem I reaction center subunit VIII	-	photosynthesis metabolic process cellular process	chloroplast thylakoid membrane membrane-bounded organelle plastid membrane intracellular anatomical structure plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid intracellular organelle organelle envelope cellular anatomical structure bounding membrane of organelle membraneless organelle thylakoid chloroplast thylakoid membrane membrane-bounded organelle plastid membrane intracellular anatomical structure plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid intracellular organelle organelle envelope cellular anatomical structure bounding membrane of organelle membraneless organelle thylakoid plastid envelope chloroplast membrane intracellular membraneless organelle intracellular membrane-bounded organelle thylakoid membrane organelle chloroplast thylakoid outer membrane cytoplasm photosynthetic membrane organelle membrane protein-containing complex photosystem photosystem I membrane protein complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, Q [auth a]	IPR006243	Photosystem I PsaA	Family
A, Q [auth a]	IPR036408	Photosystem I PsaA/PsaB superfamily	Homologous Superfamily
A, Q [auth a]	IPR001280	Photosystem I PsaA/PsaB	Family
A, Q [auth a]	IPR020586	Photosystem I PsaA/PsaB, conserved site	Conserved Site
J, Z [auth j]	IPR002615	Photosystem I PsaJ, reaction centre subunit IX	Family
J, Z [auth j]	IPR036062	Photosystem I PsaJ, reaction centre subunit IX superfamily	Homologous Superfamily
AA [auth k], K	IPR023618	Photosystem I PsaG/PsaK domain, chloroplastic	Homologous Superfamily
AA [auth k], K	IPR016370	Photosystem I reaction center subunit V/PsaK, plant	Family
AA [auth k], K	IPR000549	Photosystem I reaction center subunit V/PsaK	Family
AA [auth k], K	IPR035982	Photosystem I reaction centre subunit PsaK superfamily	Homologous Superfamily
AA [auth k], K	IPR017493	Photosystem I reaction center subunit psaK, plant	Family
BA [auth l], L	IPR003757	Photosystem I PsaL, reaction centre subunit XI	Domain
BA [auth l], L	IPR022980	Photosystem I, reaction centre subunit XI	Family
BA [auth l], L	IPR036592	Photosystem I PsaL, reaction centre subunit XI superfamily	Homologous Superfamily
CA [auth 6], M [auth 1]	IPR001344	Chlorophyll A-B binding protein, plant and chromista	Family
CA [auth 6], M [auth 1]	IPR022796	Chlorophyll A-B binding protein	Family
DA [auth 7], N [auth 2]	IPR001344	Chlorophyll A-B binding protein, plant and chromista	Family
DA [auth 7], N [auth 2]	IPR022796	Chlorophyll A-B binding protein	Family
EA [auth 8], O [auth 3]	IPR001344	Chlorophyll A-B binding protein, plant and chromista	Family
EA [auth 8], O [auth 3]	IPR022796	Chlorophyll A-B binding protein	Family
FA [auth 9], P [auth 4]	IPR001344	Chlorophyll A-B binding protein, plant and chromista	Family
FA [auth 9], P [auth 4]	IPR022796	Chlorophyll A-B binding protein	Family
B, R [auth b]	IPR036408	Photosystem I PsaA/PsaB superfamily	Homologous Superfamily
B, R [auth b]	IPR001280	Photosystem I PsaA/PsaB	Family
B, R [auth b]	IPR006244	Photosystem I PsaB	Family
B, R [auth b]	IPR020586	Photosystem I PsaA/PsaB, conserved site	Conserved Site
C, S [auth c]	IPR017900	4Fe-4S ferredoxin, iron-sulphur binding, conserved site	Conserved Site
C, S [auth c]	IPR050157	Photosystem I iron-sulfur center	Family
C, S [auth c]	IPR017896	4Fe-4S ferredoxin-type, iron-sulphur binding domain	Domain
C, S [auth c]	IPR017491	Photosystem I protein PsaC	Family
D, T [auth d]	IPR003685	Photosystem I PsaD	Family
D, T [auth d]	IPR036579	Photosystem I, reaction centre subunit PsaD superfamily	Homologous Superfamily
E, U [auth e]	IPR008990	Electron transport accessory-like domain superfamily	Homologous Superfamily
E, U [auth e]	IPR003375	Photosystem I PsaE, reaction centre subunit IV	Family
F, V [auth f]	IPR036577	Photosystem I PsaF, reaction centre subunit III superfamily	Homologous Superfamily
F, V [auth f]	IPR003666	Photosystem I PsaF, reaction centre subunit III	Family
G, W [auth g]	IPR023618	Photosystem I PsaG/PsaK domain, chloroplastic	Homologous Superfamily
G, W [auth g]	IPR017494	Photosystem I reaction center subunit V	Family
G, W [auth g]	IPR016370	Photosystem I reaction center subunit V/PsaK, plant	Family
G, W [auth g]	IPR000549	Photosystem I reaction center subunit V/PsaK	Family
H, X [auth h]	IPR004928	Photosystem I PsaH, reaction centre subunit VI	Family
I, Y [auth i]	IPR036357	Photosystem I reaction centre subunit VIII superfamily	Homologous Superfamily
I, Y [auth i]	IPR001302	Photosystem I reaction centre subunit VIII	Family

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, AA [auth k], B, BA [auth l], C A, AA [auth k], B, BA [auth l], C, CA [auth 6], DA [auth 7], E, EA [auth 8], F, FA [auth 9], G, H, I, J, K, L, M [auth 1], N [auth 2], O [auth 3], P [auth 4], Q [auth a], R [auth b], S [auth c], U [auth e], V [auth f], W [auth g], X [auth h], Y [auth i], Z [auth j]	OPM	Transmembrane	Alpha-helical polytopic	Photosystems	Photosystem I

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, AA [auth k], B, BA [auth l], C A, AA [auth k], B, BA [auth l], C, CA [auth 6], DA [auth 7], E, EA [auth 8], F, FA [auth 9], G, H, I, J, K, L, M [auth 1], N [auth 2], O [auth 3], P [auth 4], Q [auth a], R [auth b], S [auth c], U [auth e], V [auth f], W [auth g], X [auth h], Y [auth i], Z [auth j]	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A, AA [auth k], B, BA [auth l], C A, AA [auth k], B, BA [auth l], C, CA [auth 6], DA [auth 7], E, EA [auth 8], F, FA [auth 9], G, H, I, J, K, L, M [auth 1], N [auth 2], O [auth 3], P [auth 4], Q [auth a], R [auth b], S [auth c], U [auth e], V [auth f], W [auth g], X [auth h], Y [auth i], Z [auth j]	MemProtMD	Annotated as membrane protein by MemProtMD