Structure of PDB 5cx1 Chain P

Receptor sequence

>5cx1P (length=522) Species: 354 (Azotobacter vinelandii)

SQQVDKIKASYPLFLDQDYKDMLAKKRDGFEEKYPQDKIDEVFQWTTTKE
YQELNFQREALTVNPAKACQPLGAVLCALGFEKTMPYVHGSQGCVAYFRS
YFNRHFREPVSCVSDSMTEDAAVFGGQQNMKDGLQNCKATYKPDMIAVST
TCMAEVIGDDLNAFINNSKKEGFIPDEFPVPFAHTPSFVGSHVTGWDNMF
EGIARYFTLKSMDDKVVGSNKKINIVPGFETYLGNFRVIKRMLSEMGVGY
SLLSDPEEVLDTPADGQFRMYAGGTTQEEMKDAPNALNTVLLQPWHLEKT
KKFVEGTWKHEVPKLNIPMGLDWTDEFLMKVSEISGQPIPASLTKERGRL
VDMMTDSHTWLHGKRFALWGDPDFVMGLVKFLLELGCEPVHILCHNGNER
WKKAVDAILAASPYGKNATVYIGKDLWHLRSLVFTDKPDFMIGNSYGKFI
QRDTLHKGKEFEVPLIRIGFPIFDRHHLHRSTTLGYEGAMQILTTLVNSI
LERLDEETRGMQATDYNHDLVR

3D structure

• PDB: 5cx1 Evidence for Functionally Relevant Encounter Complexes in Nitrogenase Catalysis.
• Chain: P
• Resolution: 1.7476 Å

Enzymatic activity

• Catalytic site (original residue number in PDB): C153 V157
• Catalytic site (residue number reindexed from 1): C152 V156
• 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	CA	P	R108 E109	R107 E108
BS02	CLF	P	C70 S92 G94 C95 Y98 T152 C153 S188	C69 S91 G93 C94 Y97 T151 C152 S187
BS03	CA	P	D353 D357	D352 D356

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

External links

• PDB: RCSB:5cx1, PDBe:5cx1, PDBj:5cx1
• PDBsum: 5cx1
• PubMed: 26360912
• UniProt: P07329|NIFK_AZOVI Nitrogenase molybdenum-iron protein beta chain (Gene Name=nifK)