1J8A

CRYSTAL STRUCTURE OF BENZAMIDINE INHIBITED BOVINE PANCREATIC TRYPSIN AT 105K TO 1.21A RESOLUTION FROM LABORATORY SOURCE WITH HIGH NUMBER OF WATERS MODELLED

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	5PTP	PDB ENTRY 5PTP

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.4	293.15	PEG 6000, ammonium sulfate, tris-HCl, benzamidine, calcium chloride, pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 293.15K

Crystal Properties
Matthews coefficient	Solvent content
2.25	45.42

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 54.275	α = 90
b = 58.568	β = 90
c = 66.141	γ = 90

Symmetry
Space Group	P 21 21 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	105	ENRAF-NONIUS	ENRAF-NONIUS		2000-06-09	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	ENRAF-NONIUS FR590

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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	1.2	19.9	97.4	0.061	13.2	10.5	64859	64859			11.6

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.2	1.24	77.1		0.429	1.5	2.1	6239

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	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 5PTP	1.21	19.9	64546	64546	3273	99.4	0.161	0.161	0.16	0.178	RANDOM	9.5

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]
-8.1		0.674		0.138

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_deg	25.877
c_scangle_it	1.908
c_angle_deg	1.574
c_scbond_it	1.453
c_mcangle_it	1.077
c_improper_angle_deg	1.023
c_mcbond_it	0.753
c_bond_d	0.00839

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1629
Nucleic Acid Atoms
Solvent Atoms	385
Heterogen Atoms	45

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing
CNS	refinement

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.