1CC1

CRYSTAL STRUCTURE OF A REDUCED, ACTIVE FORM OF THE NI-FE-SE HYDROGENASE FROM DESULFOMICROBIUM BACULATUM

X-RAY DIFFRACTION

Starting Model(s)

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

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.2		pH 6.2

Crystal Properties
Matthews coefficient	Solvent content
2	38.4

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 110.39	α = 90
b = 63.7	β = 90
c = 99.58	γ = 90

Symmetry
Space Group	P 21 21 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	110	CCD		MIRRORS	1996-10-21	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE BM02		ESRF	BM02

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	2.15	20	93	0.083		5.6		36050			23.2

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)
1	2.15	2.18	48.8		0.202

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work (Depositor)	R-Free (Depositor)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 2FRV	2.15	8	2	34362	1684	90.1	0.194	0.248	RANDOM	25.7

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]
0.881			0.956		-1.837

RMS Deviations
Key	Refinement Restraint Deviation
x_dihedral_angle_d	24.4
x_scangle_it	4.63
x_mcangle_it	3.14
x_scbond_it	2
x_angle_deg	1.84
x_improper_angle_d	1.65
x_mcbond_it	1.32
x_bond_d	0.011
x_bond_d_na
x_bond_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5861
Nucleic Acid Atoms
Solvent Atoms	319
Heterogen Atoms	34

Software

Software
Software Name	Purpose
XDS	data scaling
CCP4	data reduction
AMoRE	phasing
X-PLOR	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.