HMM Summary Page: TIGR01286

Functionnitrogenase molybdenum-iron protein beta chain
Gene SymbolnifK
Trusted Cutoff427.30
Domain Trusted Cutoff427.30
Noise Cutoff414.50
Domain Noise Cutoff414.50
Isology Typeequivalog
EC Number1.18.6.1
HMM Length516
Mainrole CategoryCentral intermediary metabolism
Subrole CategoryNitrogen fixation
Gene Ontology TermGO:0009399: nitrogen fixation biological_process
GO:0016163: nitrogenase activity molecular_function
GO:0016612: molybdenum-iron nitrogenase complex cellular_component
AuthorHaft DH
Entry DateJun 25 2001 3:17PM
Last ModifiedFeb 14 2011 3:27PM
CommentThis HMM represents the majority of known sequences of the nitrogenase molybdenum-iron protein beta subunit. A distinct clade in a phylogenetic tree contains molybdenum-iron, vanadium-iron, and iron-iron forms of nitrogenase beta subunit and is excluded from this model. Nitrogenase, also called dinitrogenase, is responsible for nitrogen fixation. Note: the trusted cutoff score has recently been lowered to include an additional family in which the beta subunit is shorter by about 50 amino acids at the N-terminus. In species with the shorter form of the beta subunit, the alpha subunit has a novel insert of similar length.
Genome PropertyGenProp0633: nitrogenase, Mo-containing (HMM)