Protein Family Models

This is the N-terminal tail of the respiratory nitrate reductase alpha chain. The nitrate reductase complex is a dimer of heterotrimers each consisting of an alpha, beta and gamma chain. The N-terminal tail of the alpha chain interacts with the beta chain and contributes to the stability of the heterotrimer [1]. [1]. 12910261. Insights into the respiratory electron transfer pathway from the structure of nitrate reductase A. Bertero MG, Rothery RA, Palak M, Hou C, Lim D, Blasco F, Weiner JH, Strynadka NC;. Nat Struct Biol. 2003;10:681-687. (from Pfam)

Date:

2024-10-16

This domain is found in various molybdopterin - containing oxidoreductases and tungsten formylmethanofuran dehydrogenase subunit d (FwdD) and molybdenum formylmethanofuran dehydrogenase subunit (FmdD); where the domain constitutes almost the entire subunit. The formylmethanofuran dehydrogenase catalyses the first step in methane formation from CO2 in methanogenic archaea and has a molybdopterin dinucleotide cofactor [1]. This domain corresponds to the C-terminal domain IV in dimethyl sulfoxide (DMSO)reductase which interacts with the 2-amino pyrimidone ring of both molybdopterin guanine dinucleotide molecules [2]. [1]. 9818358. The formylmethanofuran dehydrogenase isoenzymes in Methanobacterium wolfei and Methanobacterium thermoautotrophicum: induction of the molybdenum isoenzyme by molybdate and constitutive synthesis of the tungsten isoenzyme. Hochheimer A, Hedderich R, Thauer RK;. Arch Microbiol 1998;170:389-393. [2]. 8890912. Crystal structure of dimethyl sulfoxide reductase from Rhodobacter capsulatus at 1.88 A resolution. Schneider F, Lowe J, Huber R, Schindelin H, Kisker C, Knablein J;. J Mol Biol 1996;263:53-69. (from Pfam)

Date:

2024-10-16

Date:

2024-08-14

nitrate reductase subunit alpha (NarG) is part of the nitrate reductase complex, which uses nitrate as an electron acceptor during anaerobic growth. The complex contains the catalytic subunits alpha and beta, as well as two gamma subunits, which are responsible for membrane attachment.

Date:

2024-11-14

The Nitrate reductase enzyme complex allows bacteria to use nitrate as an electron acceptor during anaerobic growth. The enzyme complex consists of a tetramer that has an alpha, beta and 2 gamma subunits. The alpha and beta subunits have catalytic activity and the gamma subunits attach the enzyme to the membrane and is a b-type cytochrome that receives electrons from the quinone pool and transfers them to the beta subunit. This model is specific for the alpha subunit for nitrate reductase I (narG) and nitrate reductase II (narZ) for gram positive and gram negative bacteria.A few thermophiles and archaea also match the model The seed members used to make the model include Nitrate reductases from Pseudomonas fluorescens (GP:11344601), E.coli (SP:P09152) and B.subtilis (SP:P42175). All seed members are experimentally characterized. Some unpublished nitrate reductases, that are shorter sequences, and probably fragments fall in between the noise and trusted cutoffs. Pfam models PF00384 (Molybdopterin oxidoreductase) and PF01568(Molydopterin dinucleotide binding domain) will also match the nitrate reductase, alpha subunit.

Date:

2024-06-24