Experiment: 1QK4

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1QK3	PDB ENTRY 1QK3, SUBUNIT A, WITHOUT LOOPS, WATERS, OR GMP

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		8.5	277	30% PEG 4000, 100 MM TRIS (PH 8.5), 200 MM LI2SO4, 0.25 % BETA-OCTYLGLUCOPYRANOSIDE 1 MM IMP, 277 K

Crystal Properties
Matthews coefficient	Solvent content
2.21	45

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 84.537	α = 90
b = 102.445	β = 90
c = 108.825	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	100	IMAGE PLATE	MARRESEARCH	PT-COATED MIRROR	1997-06-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL7-1		SSRL	BL7-1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	12.5	99.6	0.076	10.7	4.1		74791			19.863

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.9	1.97	100		0.383	3.5	4

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1QK3, SUBUNIT A, WITHOUT LOOPS, WATERS, OR GMP	1.9	12.5	70933	3778	99.6	0.189	0.19	0.238	0.24	RANDOM	22.81

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_scangle_it	3.56
p_mcangle_it	2.777
p_scbond_it	2.266
p_mcbond_it	1.9
p_chiral_restr	0.142
p_planar_d	0.038
p_angle_d	0.033
p_bond_d	0.014
p_plane_restr	0.0118
p_angle_deg

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	7079
Nucleic Acid Atoms
Solvent Atoms	485
Heterogen Atoms	92

Software

Software
Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
AMoRE	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 R01GM157729.