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- PDB-1fp6: THE NITROGENASE FE PROTEIN FROM AZOTOBACTER VINELANDII COMPLEXED ... -

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Basic information

Entry
Database: PDB / ID: 1fp6
TitleTHE NITROGENASE FE PROTEIN FROM AZOTOBACTER VINELANDII COMPLEXED WITH MGADP
ComponentsNITROGENASE IRON PROTEIN
KeywordsOXIDOREDUCTASE / Nitrogenase / nitrogen fixation / nuclotide / MgADP / Fe protein / Av2
Function / homology
Function and homology information


nitrogenase / nitrogenase activity / nitrogen fixation / 4 iron, 4 sulfur cluster binding / ATP binding / metal ion binding
Similarity search - Function
Nitrogenase iron protein NifH / NifH/frxC family / NifH/chlL conserved site / 4Fe-4S iron sulfur cluster binding proteins, NifH/frxC family / NifH/frxC family signature 2. / NifH/frxC family signature 1. / NIFH_FRXC family profile. / P-loop containing nucleotide triphosphate hydrolases / Rossmann fold / P-loop containing nucleoside triphosphate hydrolase ...Nitrogenase iron protein NifH / NifH/frxC family / NifH/chlL conserved site / 4Fe-4S iron sulfur cluster binding proteins, NifH/frxC family / NifH/frxC family signature 2. / NifH/frxC family signature 1. / NIFH_FRXC family profile. / P-loop containing nucleotide triphosphate hydrolases / Rossmann fold / P-loop containing nucleoside triphosphate hydrolase / 3-Layer(aba) Sandwich / Alpha Beta
Similarity search - Domain/homology
ADENOSINE-5'-DIPHOSPHATE / IRON/SULFUR CLUSTER / Nitrogenase iron protein 1
Similarity search - Component
Biological speciesAzotobacter vinelandii (bacteria)
MethodX-RAY DIFFRACTION / SYNCHROTRON / Resolution: 2.15 Å
AuthorsJang, S.B. / Seefeldt, L.C. / Peters, J.W.
CitationJournal: Biochemistry / Year: 2000
Title: Insights into nucleotide signal transduction in nitrogenase: structure of an iron protein with MgADP bound.
Authors: Jang, S.B. / Seefeldt, L.C. / Peters, J.W.
History
DepositionAug 30, 2000Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jan 17, 2001Provider: repository / Type: Initial release
Revision 1.1Apr 27, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3Feb 7, 2024Group: Data collection / Database references / Derived calculations
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_struct_conn_angle / struct_conn / struct_site
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _pdbx_struct_conn_angle.ptnr1_auth_asym_id / _pdbx_struct_conn_angle.ptnr1_auth_comp_id / _pdbx_struct_conn_angle.ptnr1_auth_seq_id / _pdbx_struct_conn_angle.ptnr1_label_asym_id / _pdbx_struct_conn_angle.ptnr1_label_atom_id / _pdbx_struct_conn_angle.ptnr1_label_comp_id / _pdbx_struct_conn_angle.ptnr1_label_seq_id / _pdbx_struct_conn_angle.ptnr2_auth_asym_id / _pdbx_struct_conn_angle.ptnr2_auth_comp_id / _pdbx_struct_conn_angle.ptnr2_auth_seq_id / _pdbx_struct_conn_angle.ptnr2_label_asym_id / _pdbx_struct_conn_angle.ptnr2_label_atom_id / _pdbx_struct_conn_angle.ptnr2_label_comp_id / _pdbx_struct_conn_angle.ptnr3_auth_asym_id / _pdbx_struct_conn_angle.ptnr3_auth_comp_id / _pdbx_struct_conn_angle.ptnr3_auth_seq_id / _pdbx_struct_conn_angle.ptnr3_label_asym_id / _pdbx_struct_conn_angle.ptnr3_label_atom_id / _pdbx_struct_conn_angle.ptnr3_label_comp_id / _pdbx_struct_conn_angle.value / _struct_conn.pdbx_dist_value / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr1_label_seq_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_comp_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_atom_id / _struct_conn.ptnr2_label_comp_id / _struct_conn.ptnr2_label_seq_id / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: NITROGENASE IRON PROTEIN
B: NITROGENASE IRON PROTEIN
C: NITROGENASE IRON PROTEIN
D: NITROGENASE IRON PROTEIN
hetero molecules


Theoretical massNumber of molelcules
Total (without water)128,17714
Polymers125,6684
Non-polymers2,50910
Water21,4381190
1
A: NITROGENASE IRON PROTEIN
B: NITROGENASE IRON PROTEIN
hetero molecules


Theoretical massNumber of molelcules
Total (without water)64,0897
Polymers62,8342
Non-polymers1,2555
Water362
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area6640 Å2
ΔGint-79 kcal/mol
Surface area21150 Å2
MethodPISA
2
C: NITROGENASE IRON PROTEIN
D: NITROGENASE IRON PROTEIN
hetero molecules


Theoretical massNumber of molelcules
Total (without water)64,0897
Polymers62,8342
Non-polymers1,2555
Water362
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area6590 Å2
ΔGint-83 kcal/mol
Surface area20550 Å2
MethodPISA
Unit cell
Length a, b, c (Å)93.25, 119.53, 120.94
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number19
Cell settingorthorhombic
Space group name H-MP212121
Detailshomodimer complexed with two molecules of MgADP

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Components

#1: Protein
NITROGENASE IRON PROTEIN / E.C.1.18.6.1 / NITROGENASE COMPONENT II / NITROGENASE REDUCTASE / NIFH / AV2


Mass: 31417.045 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Azotobacter vinelandii (bacteria) / Production host: Escherichia coli (E. coli) / References: UniProt: P00459, nitrogenase
#2: Chemical
ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Mg
#3: Chemical ChemComp-SF4 / IRON/SULFUR CLUSTER


Mass: 351.640 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Fe4S4
#4: Chemical
ChemComp-ADP / ADENOSINE-5'-DIPHOSPHATE


Mass: 427.201 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C10H15N5O10P2 / Comment: ADP, energy-carrying molecule*YM
#5: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 1190 / Source method: isolated from a natural source / Formula: H2O

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Experimental details

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Experiment

ExperimentMethod: X-RAY DIFFRACTION / Number of used crystals: 1

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Sample preparation

CrystalDensity Matthews: 2.68 Å3/Da / Density % sol: 54.12 %
Crystal growTemperature: 298 K / Method: liquid diffusion / pH: 8.5
Details: PEG 4000, 0.1M Tris HCl, Sodium Acetate, Glycerol, pH 8.5, LIQUID DIFFUSION, temperature 298K
Crystal grow
*PLUS
Method: batch method
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDChemical formula
130 %PEG400011
20.1 MTris-HCl11
30.2 Msodium acetate11
418 %glycerol11
510 mM11MgADP

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: SSRL / Beamline: BL9-1 / Wavelength: 0.97
DetectorType: MARRESEARCH / Detector: IMAGE PLATE / Date: Feb 24, 2000
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.97 Å / Relative weight: 1
ReflectionResolution: 2.15→30 Å / Num. all: 65315 / Num. obs: 65315 / % possible obs: 88.8 % / Redundancy: 3.2 % / Rmerge(I) obs: 0.064 / Net I/σ(I): 7.7
Reflection shellResolution: 2.15→2.2 Å / Redundancy: 2.9 % / Rmerge(I) obs: 0.279 / Num. unique all: 3603 / % possible all: 69.4
Reflection
*PLUS
Num. measured all: 210392
Reflection shell
*PLUS
% possible obs: 69.4 % / Mean I/σ(I) obs: 2.6

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Processing

Software
NameVersionClassification
MOSFLMdata reduction
SCALAdata scaling
AMoREphasing
X-PLOR3.851refinement
CCP4(SCALA)data scaling
RefinementResolution: 2.15→30 Å / Cross valid method: THROUGHOUT / σ(F): 1 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflectionSelection details
Rfree0.268 3299 5 %random
Rwork0.2 ---
obs0.2 65265 88.8 %-
all-65315 --
Refinement stepCycle: LAST / Resolution: 2.15→30 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms8686 0 128 1190 10004
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONx_bond_d0.009
X-RAY DIFFRACTIONx_angle_deg2.39
Software
*PLUS
Name: X-PLOR / Version: 3.851 / Classification: refinement
Refinement
*PLUS
σ(F): 1 / % reflection Rfree: 5 % / Rfactor obs: 0.2 / Rfactor Rwork: 0.2
Solvent computation
*PLUS
Displacement parameters
*PLUS

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