Experiment: 1A8T

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1A7T

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.6		PROTEIN WAS CRYSTALLIZED FROM 28% PEG 4000, 100 MM SODIUM CHLORIDE, 100 MM SODIUM CACODYLATE BUFFER, PH 6.6

Crystal Properties
Matthews coefficient	Solvent content
2.43	49.5

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 71.36	α = 90
b = 170.23	β = 90
c = 40.66	γ = 90

Symmetry
Space Group	P 21 21 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	293	AREA DETECTOR	SIEMENS		1997-02-18	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RUH2R

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	2.55	100	75	0.077	0.077	12.1	1.93		12599		1	19.89

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)
	2.55	2.71	53.8		0.125	0.125	2.4	1.65

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	EX POST FACTO	1A7T	2.55	10	1	12328	1233	75	0.181		0.18	0.319	RANDOM	8.7

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	25.6
p_staggered_tor	24.7
p_planar_tor	2.4
p_mcangle_it	1.049
p_scangle_it	0.91
p_mcbond_it	0.595
p_scbond_it	0.523
p_multtor_nbd	0.333
p_xyhbond_nbd	0.301
p_singtor_nbd	0.261

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3514
Nucleic Acid Atoms
Solvent Atoms	183
Heterogen Atoms	38

Software

Software
Software Name	Purpose
MERLOT	phasing
PROLSQ	refinement
XENGEN	data reduction
XENGEN	data scaling

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 R01GM157729.