1G5P

NITROGENASE IRON PROTEIN FROM AZOTOBACTER VINELANDII


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 1NIP 

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1LIQUID DIFFUSION829825-30% PEG 4000, 140-200 mM NA2MOO4, 100 mM TRIS-CL, PH 8.0; PROTEIN WAS IN 20% GLYCEROL, 50 mM TRIS-CL, PH 8.0, 450 mM NACL, AND 2 mM NA2S2O4 , LIQUID DIFFUSION, temperature 298K
Crystal Properties
Matthews coefficientSolvent content
2.448.73

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 73.12α = 90
b = 90.53β = 90
c = 91.12γ = 90
Symmetry
Space GroupP 21 21 21

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray113IMAGE PLATEMARRESEARCH1995-03-01MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONSSRL BEAMLINE BL7-11.08SSRLBL7-1

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (Observed)R Sym I (Observed)Net I Over Average Sigma (I)RedundancyNumber Reflections (All)Number Reflections (Observed)Observed Criterion Sigma (F)Observed Criterion Sigma (I)B (Isotropic) From Wilson Plot
12.135092.90.0850.0856.9429060
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)R-Sym I (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
2.22.2894.90.3090.3092.43.8

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUT1NIP2.2502918017370.2230.29RANDOM
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
KeyRefinement Restraint Deviation
o_angle_deg1.7
o_bond_d0.012
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms4348
Nucleic Acid Atoms
Solvent Atoms351
Heterogen Atoms8

Software

Software
Software NamePurpose
AMoREphasing
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling