4WBC

2.13 A STRUCTURE OF A KUNITZ-TYPE WINGED BEAN CHYMOTRYPSIN INHIBITOR PROTEIN

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		5.4		PROTEIN WAS CRYSTALLIZED BY HANGING DROP VAPOUR DIFFUSION FROM 25% AMM. SULPHATE IN TRIS-HCL, 10MM NA ACETATE, 400 MM NACL AT PH 5.4 AGAINST 25% AMM. SULPHATE,60MM NA ACETATE AT 4 DEG. C. CRYSTALS WERE THEN TRANSFERED TO 25% GLYCEROL (CRYOPROTECTANT) IN 25% AMM. SULPHATE, 10MM NA ACETATE BUFFER AT PH 5.4, BEFORE FLASH COOLING.

Crystal Properties
Matthews coefficient	Solvent content
2.69	54

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 60.84	α = 90
b = 60.84	β = 90
c = 207.91	γ = 120

Symmetry
Space Group	P 61 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	90	IMAGE PLATE	MARRESEARCH	DOUBLE FOCUSSING MIRRORS	1997-05-19	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU200

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	2.138	15	96.3	0.069	13			12963			30.5

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	2.13	2.18	64.5		0.236

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	OTHER	THROUGHOUT	2.138	9	11100		93.6	0.199	0.257	RANDOM	32.7

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
p_transverse_tor	37.6
p_staggered_tor	18.2
p_scangle_it	6.28
p_mcangle_it	5.33
p_planar_tor	4.5
p_scbond_it	4.47
p_mcbond_it	3.93
p_multtor_nbd	0.258
p_singtor_nbd	0.19
p_xyhbond_nbd	0.167
p_chiral_restr	0.123
p_planar_d	0.031
p_angle_d	0.027
p_plane_restr	0.02
p_bond_d	0.011
p_angle_deg
p_hb_or_metal_coord
p_xhyhbond_nbd
p_orthonormal_tor
p_special_tor

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1401
Nucleic Acid Atoms
Solvent Atoms	176
Heterogen Atoms	25

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
REFMAC	refinement