Experiment: 4MAT

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		7		Crystals of the HIS79ALA mutant were obtained by mixing the apoenzyme retaining the C-terminal HISs-tag (6.7 mg/ml, 20 mM DTT, 25 mM HEPES pH 6.8, 25 mM K2SO4, 100 mM NaCl) with an equal volume of well solution (22-27 % PEG 3400, 0.1 M HEPES pH 7.0, 200 mM NaCl). Diffraction quality crystals were obtained after macroseeding into 20 uL hanging drops.

Crystal Properties
Matthews coefficient	Solvent content
2.38	47.9

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 38.648	α = 90
b = 68.298	β = 105.98
c = 55.449	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	103	IMAGE PLATE	RIGAKU RAXIS IV		1997-10-10	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	28.8	85.2	4.7	22.4	3		16062			16.2

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)
	2	2.07	70.8		21	4.4

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	28.8	16062	16062		100	0.184

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	17.1
t_it	4.9
t_angle_deg	2.38
t_nbd	0.016
t_bond_d	0.012
t_gen_planes	0.012
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	2052
Nucleic Acid Atoms
Solvent Atoms	155
Heterogen Atoms	1

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.