3BYB

Crystal structure of Textilinin-1, a Kunitz-type serine protease inhibitor from the Australian Common Brown snake venom

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	290	0.1M HEPES, 2% (v/v) PEG 400, 2.0M ammonium sulfate , pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 290K

Crystal Properties
Matthews coefficient	Solvent content
2.41	49.03

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 99.918	α = 90
b = 99.918	β = 90
c = 77.712	γ = 90

Symmetry
Space Group	I 4 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	IMAGE PLATE	RIGAKU RAXIS IV++	Confocal X-ray optics Osmic mirrors	2005-09-19	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU FR-E+ SUPERBRIGHT	1.54178

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	1.63	50	99.6	0.075	16.9	9.06	24779	24694		3

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)
	1.63	1.69	98.8		0.36		8.7

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	1.63	22.41	23435	23435	1259	99.66	0.19265	0.19124	0.21799	RANDOM	20.333

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]
					-0.01

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.63
r_dihedral_angle_4_deg	19.33
r_dihedral_angle_3_deg	12.596
r_dihedral_angle_1_deg	6.331
r_scangle_it	3.487
r_scbond_it	2.128
r_mcangle_it	1.366
r_angle_refined_deg	1.243
r_mcbond_it	0.832
r_symmetry_hbond_refined	0.331

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.63
r_dihedral_angle_4_deg	19.33
r_dihedral_angle_3_deg	12.596
r_dihedral_angle_1_deg	6.331
r_scangle_it	3.487
r_scbond_it	2.128
r_mcangle_it	1.366
r_angle_refined_deg	1.243
r_mcbond_it	0.832
r_symmetry_hbond_refined	0.331
r_nbtor_refined	0.311
r_symmetry_vdw_refined	0.271
r_nbd_refined	0.193
r_xyhbond_nbd_refined	0.143
r_chiral_restr	0.095
r_bond_refined_d	0.01
r_gen_planes_refined	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1379
Nucleic Acid Atoms
Solvent Atoms	233
Heterogen Atoms	17

Software

Software
Software Name	Purpose
REFMAC	refinement
CrystalClear	data collection
HKL-2000	data reduction
HKL-2000	data scaling
PHASER	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 R01GM133198.