3FP7

Anionic trypsin variant S195A in complex with bovine pancreatic trypsin inhibitor (BPTI) cleaved at the scissile bond (LYS15-ALA16) determined to the 1.46 A resolution limit

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3TGI	PDB ENTRY 3TGI

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		8	295	0.2M lithium sulfate, 0.1M tris, 34% (w/v) PEG 4000, pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
2.45	49.88

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 91.969	α = 90
b = 91.969	β = 90
c = 61.001	γ = 120

Symmetry
Space Group	P 32 2 1

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	Nonius Kappa CCD	OSMIC CONFOCAL MAX-FLUX (GREEN)	2007-12-03	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	ENRAF-NONIUS FR591

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	1.46	30	99.8	0.051	22.1	14.9		51853		-3	17.7

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.46	1.51	98.4		0.205	6.7	4.5

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 (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 3TGI	1.46	30	51811	51811	4131	99.8	0.175	0.175	0.186	RANDOM, BUT IDENTICAL TO THOSE IDENTIFIED FOR PDB ENTRY 3FP6	12.1

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]

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	26
c_scangle_it	1.87
c_angle_deg	1.38
c_mcangle_it	1.38
c_scbond_it	1.3
c_improper_angle_d	1.18
c_mcbond_it	0.085
c_bond_d	0.0049
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d_na
c_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2245
Nucleic Acid Atoms
Solvent Atoms	371
Heterogen Atoms	58

Software

Software
Software Name	Purpose
SBC-Collect	data collection
CNS	refinement
HKL-2000	data reduction
HKL-2000	data scaling
CNS	phasing