1LDT

COMPLEX OF LEECH-DERIVED TRYPTASE INHIBITOR WITH PORCINE TRYPSIN

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	Other		PORCINE TRYPSIN MODEL FROM TRYPSIN:MUNG BEAN INHIBITOR (LIN ET AL., EUR. J. BIOCHEM. 212, 549-555 (1993)

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		8		10% PEG 6000, 2.3M PHOSPHATE, PH 8.0

Crystal Properties
Matthews coefficient	Solvent content
2.33	47.28

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 63.4	α = 90
b = 63.4	β = 90
c = 131.2	γ = 90

Symmetry
Space Group	P 43 21 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	287	IMAGE PLATE	MARRESEARCH	MIRRORS	1995-01-13	M

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

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	1.9	20	98.6	0.082	0.082	9	6.5		21466		2

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.9	2	87.6		0.2	0.2	4	3.2

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	PORCINE TRYPSIN MODEL FROM TRYPSIN:MUNG BEAN INHIBITOR (LIN ET AL., EUR. J. BIOCHEM. 212, 549-555 (1993)	1.9	6	21466		98.2	0.197	0.197

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
x_dihedral_angle_d	24.6
x_angle_deg	1.81
x_improper_angle_d	1.31
x_bond_d	0.008
x_bond_d_na
x_bond_d_prot
x_angle_d
x_angle_d_na
x_angle_d_prot
x_angle_deg_na
x_angle_deg_prot
x_dihedral_angle_d_na
x_dihedral_angle_d_prot
x_improper_angle_d_na
x_improper_angle_d_prot
x_mcbond_it
x_mcangle_it
x_scbond_it
x_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1846
Nucleic Acid Atoms
Solvent Atoms	149
Heterogen Atoms	1

Software

Software
Software Name	Purpose
MOSFLM	data reduction
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing