3A6S

Crystal structure of the MutT protein

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	288	1.4M POTASSIUM SODIUM TARTRATE, 87mM HEPES, pH 7.50, VAPOR DIFFUSION, HANGING DROP, temperature 288K

Crystal Properties
Matthews coefficient	Solvent content
2.24	45.04

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 33.902	α = 90
b = 71.608	β = 99.03
c = 55.797	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	100	CCD	MARRESEARCH		1999-10-28	M	SINGLE WAVELENGTH
2	1	x-ray	100	CCD	ADSC QUANTUM 4		2001-10-20	M	MAD
3	1	x-ray	100	CCD	OXFORD PX210		2001-06-19	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SPRING-8 BEAMLINE BL41XU	0.7080	SPring-8	BL41XU
2	SYNCHROTRON	PHOTON FACTORY BEAMLINE BL-18B	0.9791, 0.9793, 0.9500	Photon Factory	BL-18B
3	SYNCHROTRON	SPRING-8 BEAMLINE BL44XU	0.9795, 0.9797, 0.9500	SPring-8	BL44XU

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
1,2,3	1.8	20	99.7	0.031	15.8	3.5		24217			13.4

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)
	1.8	1.9	99.7		0.094	7.9	3.5

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD	THROUGHOUT	1.8	19.81	24213	2399	99.1	0.204	0.204	0.231	RANDOM	21.7

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]
0.45		0.67	2.15		-2.6

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	24.5
c_scangle_it	3.4
c_mcangle_it	2.52
c_scbond_it	2.2
c_mcbond_it	1.56
c_angle_deg	1.2
c_improper_angle_d	0.86
c_bond_d	0.005
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d_na
c_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2025
Nucleic Acid Atoms
Solvent Atoms	190
Heterogen Atoms	11

Software

Software
Software Name	Purpose
ADSC	data collection
SOLVE	phasing
CNS	refinement
MOSFLM	data reduction
SCALA	data scaling