Experiment: 1G39

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	Other		peptide model with selenomethionine substituted at position 12, solved by MAD

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8.5	277	PEG 4000, Tris-HCl, lithium sulphate, pH 8.5, VAPOR DIFFUSION, HANGING DROP, temperature 277.0K

Crystal Properties
Matthews coefficient	Solvent content
2.3	46.59

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 40.61	α = 90
b = 37.33	β = 90.04
c = 41.16	γ = 90

Symmetry
Space Group	P 1 21 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	200	CCD	ADSC QUANTUM 4	Double crystal	2000-02-24	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-2	1.00	SSRL	BL9-2

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	1.22	20.6	99.8	0.051	24.6	5.3	19878	36802	2	2	16.5

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)
	1.22	1.28	100		0.11	2.2	3.9	1952

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	peptide model with selenomethionine substituted at position 12, solved by MAD	1.22	20.6	19878	36802	2208	99.8	0.2552	0.2552	0.256	0.278	RANDOM	22.7

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]
-4.545			1.132		3.413

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	15.76
c_scangle_it	7.16
c_scbond_it	5.49
c_mcangle_it	4.06
c_mcbond_it	3.37
c_angle_deg	1.7
c_improper_angle_d	0.93
c_bond_d	0.013

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	906
Nucleic Acid Atoms
Solvent Atoms	169
Heterogen Atoms

Software

Software
Software Name	Purpose
CNS	refinement
MOSFLM	data reduction
CCP4	data scaling
CNS	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.