Experiment: 1B8F

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	Other		HISTIDASE IN SPACE GROUP P21 (NOT DEPOSITED)

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		8.1		CRYSTALLIZED FROM 2.0 M (NH4)2SO4, 1 % GLYCEROL, 2 % PEG 400, 0.1 M HEPES AT pH 8.1. 20 % (V/V) GLYCEROL WERE USED AS CRYOPROTECTANT

Crystal Properties
Matthews coefficient	Solvent content
2.8	56

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 79.267	α = 90
b = 116.788	β = 90
c = 129.532	γ = 90

Symmetry
Space Group	I 2 2 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	AREA DETECTOR	SIEMENS		1998-02-15	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	39	83	8.2	7.9	2.9		28972			15.8

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	2.1	2.21	66		18.2	3	1.6

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-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	HISTIDASE IN SPACE GROUP P21 (NOT DEPOSITED)	2.1	39	28972	28972	1485	83	0.197	0.187	0.19	0.263	22.9

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_transverse_tor	37.4
p_staggered_tor	19.5
p_planar_tor	8.3
p_scangle_it	2.3
p_mcangle_it	2.05
p_scbond_it	1.61
p_special_tor	1.5
p_mcbond_it	1.39
p_multtor_nbd	0.265
p_singtor_nbd	0.18

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3762
Nucleic Acid Atoms
Solvent Atoms	210
Heterogen Atoms	11

Software

Software
Software Name	Purpose
AMoRE	phasing
REFMAC	refinement
XDS	data reduction
CCP4	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.