Experiment: 3MAT

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2MAT

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.1		CRYSTALS OF THE CO(II)-SUBSTITUTED ENZYME WERE GROWN AT ROOM TEMPERATURE BY VAPOR DIFFUSION IN 20-30 UL SITTING DROPS AFTER MIXING THE PROTEIN, 12 MG/ML SOLUTION IN STORAGE BUFFER(25 MM HEPES PH 6.8, 25 MM K2SO4, 100 MM NACL, 1 MM COCL2, 15 MM METHIONINE),CONTAINING 48.8 MM N-OCTANOYL SUCROSE, 1:1 WITH WELL SOLUTIONS (24-26% PEG4000, 0.1M HEPES PH7.0-7.2,FRESH 2 MM COCL2). CRYSTALS WERE OBTAINED OF THE INHIBITOR COMPLEX BY INCUBATING THE PROTEIN AS ABOVE AT ROOM TEMPERATURE FOR 5 MIN WITH A 20-FOLD MOLAR EXCESS OF THE INHIBITOR DISSOLVED IN DMSO. THE FINAL INHIBITOR:ENZYME RATIO WAS 10:1 (1% DMSO) AFTER MIXING THE PREFORMED COMPLEX WITH WELL SOLUTION (0.1M MES PH 6.1,

Crystal Properties
Matthews coefficient	Solvent content
2.14	42

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 39.297	α = 90
b = 65.155	β = 106.12
c = 51.371	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	298	IMAGE PLATE	RIGAKU RAXIS IV		1998-05-21	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU200

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	2.1	37.8	94	0.076	20.5	3.3		13762			17.4

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	2.1	2.18	92.9		0.255	4.9

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	2MAT	2	37.8	13762	13762		100	0.156

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
t_dihedral_angle_d	17.4
t_it	4.6
t_angle_deg	2.3
t_nbd	0.014
t_bond_d	0.013
t_gen_planes	0.013
t_trig_c_planes	0.008
t_incorr_chiral_ct
t_pseud_angle

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2031
Nucleic Acid Atoms
Solvent Atoms	91
Heterogen Atoms	3

Software

Software
Software Name	Purpose
AMoRE	phasing
TNT	refinement
DENZO	data reduction
SCALEPACK	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.