Annotations: 1BBU

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1bbua1	All beta proteins	OB-fold	Nucleic acid-binding proteins	Anticodon-binding domain	Lysyl-tRNA synthetase (LysRS)	(Escherichia coli K-12 ) [TaxId: 83333 ],	SCOPe (2.08)
A	d1bbua2	Alpha and beta proteins (a+b)	Class II aaRS and biotin synthetases	Class II aaRS and biotin synthetases	Class II aminoacyl-tRNA synthetase (aaRS)-like, catalytic domain	Lysyl-tRNA synthetase (LysRS)	(Escherichia coli K-12 ) [TaxId: 83333 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Class II aminoacyl-tRNA synthetase (aaRS)-like, catalytic domain	8023521	4001782	SCOP2 (2022-06-29)
A	SCOP2 Family	Anticodon-binding domain	8029538	4001884	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Class II aaRS and biotin synthetases	8035901	3000058	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Nucleic acid-binding proteins	8041917	3000135	SCOP2 (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	tRNA_anti-codon	e1bbuA1	A: beta barrels	X: OB-fold	H: Nucleic acid-binding proteins (From Topology)	T: Nucleic acid-binding proteins	F: tRNA_anti-codon	ECOD (1.6)
A	tRNA-synt_2	e1bbuA2	A: a+b three layers	X: Class II aaRS and biotin synthetases (From Topology)	H: Class II aaRS and biotin synthetases (From Topology)	T: Class II aaRS and biotin synthetases	F: tRNA-synt_2	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.40.50.140	Mainly Beta	Beta Barrel	OB fold (Dihydrolipoamide Acetyltransferase, E2P)	Nucleic acid-binding proteins	CATH (4.3.0)
A	3.30.930.10	Alpha Beta	2-Layer Sandwich	BirA Bifunctional Protein	domain 2	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00152	tRNA synthetases class II (D, K and N) (tRNA-synt_2)	tRNA synthetases class II (D, K and N)	-	Domain
A	PF01336	OB-fold nucleic acid binding domain (tRNA_anti-codon)	OB-fold nucleic acid binding domain	This family contains OB-fold domains that bind to nucleic acids [4]. The family includes the anti-codon binding domain of lysyl, aspartyl, and asparaginyl -tRNA synthetases (See Pfam:PF00152). Aminoacyl-tRNA synthetases catalyse the addition of an a ...	This family contains OB-fold domains that bind to nucleic acids [4]. The family includes the anti-codon binding domain of lysyl, aspartyl, and asparaginyl -tRNA synthetases (See Pfam:PF00152). Aminoacyl-tRNA synthetases catalyse the addition of an amino acid to the appropriate tRNA molecule EC:6.1.1.-. This family also includes part of RecG helicase involved in DNA repair. Replication factor A is a hetero-trimeric complex, that contains a subunit in this family [2,3]. This domain is also found at the C-terminus of bacterial DNA polymerase III alpha chain.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	PROTEIN (LYSYL-TRNA SYNTHETASE)	cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding purine nucleotide binding organic cyclic compound binding anion binding cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding identical protein binding protein binding protein homodimerization activity protein dimerization activity ligase activity, forming carbon-oxygen bonds aminoacyl-tRNA ligase activity catalytic activity, acting on RNA catalytic activity, acting on a nucleic acid catalytic activity, acting on a tRNA lysine-tRNA ligase activity catalytic activity ligase activity RNA binding tRNA binding nucleic acid binding	amino acid activation tRNA aminoacylation cellular biosynthetic process cellular metabolic process RNA metabolic process primary metabolic process amino acid metabolic process translation gene expression tRNA aminoacylation for protein translation macromolecule biosynthetic process nucleic acid metabolic process tRNA metabolic process nucleobase-containing compound metabolic process biosynthetic process amino acid activation tRNA aminoacylation cellular biosynthetic process cellular metabolic process RNA metabolic process primary metabolic process amino acid metabolic process translation gene expression tRNA aminoacylation for protein translation macromolecule biosynthetic process nucleic acid metabolic process tRNA metabolic process nucleobase-containing compound metabolic process biosynthetic process metabolic process cellular process macromolecule metabolic process protein metabolic process lysyl-tRNA aminoacylation	membrane cellular anatomical entity intracellular anatomical structure cytoplasm cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR045864	Class II Aminoacyl-tRNA synthetase/Biotinyl protein ligase (BPL) and lipoyl protein ligase (LPL)	Homologous Superfamily
A	IPR034762	Bacterial/eukaryotic lysine-tRNA ligase, class II	Family
A	IPR004365	OB-fold nucleic acid binding domain, AA-tRNA synthetase-type	Domain
A	IPR006195	Aminoacyl-tRNA synthetase, class II	Domain
A	IPR018149	Lysyl-tRNA synthetase, class II, C-terminal	Domain
A	IPR012340	Nucleic acid-binding, OB-fold	Homologous Superfamily
A	IPR004364	Aminoacyl-tRNA synthetase, class II (D/K/N)	Domain
A	IPR002313	Lysine-tRNA ligase, class II	Family
A	IPR044136	Lysine-tRNA ligase, class II, N-terminal	Domain

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.