1TO2

crystal structure of the complex of subtilisin BPN' with chymotrypsin inhibitor 2 M59K, in pH 9 cryosoak

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1TM3	PDB entry 1tm3

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	9	277	sodium citrate, isopropanol, PEG 4000, xylitol, pH 9.0, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
3.4	63.2

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 93.671	α = 90
b = 93.671	β = 90
c = 185.92	γ = 120

Symmetry
Space Group	P 65 2 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	CCD	ADSC QUANTUM 4		2002-07-11	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.3.1	1.0	ALS	8.3.1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym I (Observed)	Net I Over Average Sigma (I)	Redundancy	Number Reflections (All)	Number Reflections (Observed)	Observed Criterion Sigma (F)	Observed Criterion Sigma (I)	B (Isotropic) From Wilson Plot
1	1.3	81.65	98.4	0.053	13.2	4.1	109999	109999	-3	-3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	Cut-off Sigma (F)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB entry 1tm3	1.3	81.65	-3	-3	109999	104506	5493	98.36	0.16856	0.16856	0.16777	0.18335	inherited from 1tm3	14.128

Temperature Factor Modeling
Anisotropic B[1][1]	Anisotropic B[1][2]	Anisotropic B[1][3]	Anisotropic B[2][2]	Anisotropic B[2][3]	Anisotropic B[3][3]
0.2	0.1		0.2		-0.3

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	5.866
r_scangle_it	4.304
r_scbond_it	2.652
r_angle_refined_deg	1.915
r_mcangle_it	1.567
r_mcbond_it	0.931
r_symmetry_vdw_refined	0.43
r_nbd_refined	0.217
r_xyhbond_nbd_refined	0.165
r_symmetry_hbond_refined	0.161

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	5.866
r_scangle_it	4.304
r_scbond_it	2.652
r_angle_refined_deg	1.915
r_mcangle_it	1.567
r_mcbond_it	0.931
r_symmetry_vdw_refined	0.43
r_nbd_refined	0.217
r_xyhbond_nbd_refined	0.165
r_symmetry_hbond_refined	0.161
r_chiral_restr	0.119
r_metal_ion_refined	0.054
r_bond_refined_d	0.019
r_gen_planes_refined	0.008

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2566
Nucleic Acid Atoms
Solvent Atoms	449
Heterogen Atoms	67

Software

Software
Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
CCP4	data scaling
TRUNCATE	data scaling
EPMR	phasing

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.