1KG4

Crystal structure of the K142A mutant of E. coli MutY (core fragment)

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	288	Lithium sulfate, HEPES, Sodium chloride, Magnesium sulfate, pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 288K

Crystal Properties
Matthews coefficient	Solvent content
1.79	49.72

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 83.03	α = 90
b = 50.06	β = 122.6
c = 69.88	γ = 90

Symmetry
Space Group	C 1 2 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	CCD	ADSC QUANTUM 4		2000-04-13	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X26C	1.100	NSLS	X26C

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	1.6	20	96.7	0.047	17.7	4.5	30985	30985			9.8

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	1.6	1.63	70.9		0.229		3	1143

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-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	difference fourier	FREE R	1KG2	1.6	20	30985	30985	1548	96.7	0.149	0.197	RANDOM	13.1

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]

Coordinate Error
Structure Solution Method	Refinement High Resolution	Refinement Low Resolution
8		2119

RMS Deviations
Key	Refinement Restraint Deviation
s_similar_adp_cmpnt	0.057
s_non_zero_chiral_vol	0.052
s_zero_chiral_vol	0.041
s_angle_d	0.024
s_from_restr_planes	0.0219
s_anti_bump_dis_restr	0.016
s_bond_d	0.01
s_rigid_bond_adp_cmpnt	0.004
s_similar_dist
s_approx_iso_adps

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1748
Nucleic Acid Atoms
Solvent Atoms	333
Heterogen Atoms	25

Software

Software
Software Name	Purpose
SHELXL-97	refinement
SCALEPACK	data scaling
CNS	refinement
DENZO	data reduction
CNS	phasing

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.