HMM Summary Page: TIGR01284

Functionnitrogenase alpha chain
Trusted Cutoff512.80
Domain Trusted Cutoff512.80
Noise Cutoff392.75
Domain Noise Cutoff392.75
Isology Typesubfamily
EC Number1.18.6.1
HMM Length457
Mainrole CategoryCentral intermediary metabolism
Subrole CategoryNitrogen fixation
AuthorHaft DH
Entry DateJun 22 2001 2:09PM
Last ModifiedFeb 14 2011 3:27PM
CommentThis model represents the alpha chains of various forms of the nitrogen-fixing enzyme nitrogenase: vanadium-iron, iron-iron, and molybdenum-iron. Most examples of NifD, the molybdenum-iron type nitrogenase alpha chain, are excluded from this model and described instead by equivalog model TIGR01282. It appears by phylogenetic and UPGMA trees that this model represents a distinct clade of NifD homologs, in which arose several molybdenum-independent forms.