Structure of PDB 1g20 Chain A

Receptor sequence
>1g20A (length=476) Species: 354 (Azotobacter vinelandii) [Search protein sequence]
SREEVESLIQEVLEVYPEKARKDRNKHLAVNDPAVTQSKKCIISNKKSQP
GLMTIRGCAYAGSKGVVWGPIKDMIHISHGPVGCGQYSRAGRRNYYIGTT
GVNAFVTMNFTSDFQEKDIVFGGDKKLAKLIDEVETLFPLNKGISVQSEC
PIGLIGDDIESVSKVKGAELSKTIVPVRCEGFRGVSQSLGHHIANDAVRD
WVLGKRDEDTTFASTPYDVAIIGDYNIGGDAWSSRILLEEMGLRCVAQWS
GDGSISEIELTPKVKLNLVHCYRSMNYISRHMEEKYGIPWMEYNFFGPTK
TIESLRAIAAKFDESIQKKCEEVIAKYKPEWEAVVAKYRPRLEGKRVMLY
IGGLRPRHVIGAYEDLGMEVVGTGYEFAHNDDYDRTMKEMGDSTLLYDDV
TGYEFEEFVKRIKPDLIGSGIKEKFIFQKMGIPFREMHSWDYSGPYHGFD
GFAIFARDMDMTLNNPCWKKLQAPWE
3D structure
PDB1g20 MgATP-Bound and nucleotide-free structures of a nitrogenase protein complex between the Leu 127 Delta-Fe-protein and the MoFe-protein.
ChainA
Resolution2.2 Å
3D
structure
Catalytic site residues are labeled in the structure
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Enzymatic activity
Catalytic site (original residue number in PDB) C62 A65 R96 H195
Catalytic site (residue number reindexed from 1) C58 A61 R92 H191
Enzyme Commision number 1.18.6.1: nitrogenase.
Interaction with ligand
Site
#		 Ligand Ligand
chain		 Binding residues on receptor
(original residue number in PDB)		 Binding residues on receptor
(residue number reindexed from 1)		 Binding affinity
BS01 CFM A V70 R96 H195 Y229 C275 S278 G356 G357 L358 R359 F381 H442 V66 R92 H191 Y225 C271 S274 G352 G353 L354 R355 F377 H438
BS02 CLF A C62 Y64 P85 G87 C88 C154 G185 C58 Y60 P81 G83 C84 C150 G181
Gene Ontology
Molecular Function
GO:0005524 ATP binding
GO:0016163 nitrogenase activity
GO:0016491 oxidoreductase activity
GO:0046872 metal ion binding
GO:0051536 iron-sulfur cluster binding
Biological Process
GO:0009399 nitrogen fixation
Cellular Component
GO:0016612 molybdenum-iron nitrogenase complex

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Molecular Function
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Biological Process
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Cellular Component
External links
PDB RCSB:1g20, PDBe:1g20, PDBj:1g20
PDBsum1g20
PubMed11170380
UniProtP07328|NIFD_AZOVI Nitrogenase molybdenum-iron protein alpha chain (Gene Name=nifD)

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