UniProt functional annotation for Q5SKZ7

UniProt code: Q5SKZ7.

Organism: Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579).
Taxonomy: Bacteria; Deinococcus-Thermus; Deinococci; Thermales; Thermaceae; Thermus.
 
Function: NDH-1 shuttles electrons from NADH, via FMN and iron- sulfur (Fe-S) centers, to quinones in the respiratory chain. The immediate electron acceptor for the enzyme in this species is menaquinone. Couples the redox reaction to proton translocation (for every two electrons transferred, four hydrogen ions are translocated across the cytoplasmic membrane), and thus conserves the redox energy in a proton gradient required for the synthesis of ATP. The Nqo15 subunit has probably a role in complex stabilization, and may be also involved in the storage of iron for iron-sulfur cluster regeneration in the complex. {ECO:0000269|PubMed:16469879, ECO:0000269|PubMed:16584177}.
 
Catalytic activity: NADH + a quinone = NAD(+) + a quinol.
Subunit: NDH-1 is composed of 15 different subunits, Nqo1 to Nqo15. The complex has a L-shaped structure, with the hydrophobic arm (subunits Nqo7, Nqo8 and Nqo10 to Nqo14) embedded in the membrane and the hydrophilic peripheral arm (subunits Nqo1 to Nqo6, Nqo9 and Nqo15) protruding into the bacterial cytoplasm. The hydrophilic domain contains all the redox centers. Nqo15 is bound to the side of the complex near the N-terminus of Nqo3, where it interacts with subunits Nqo3, Nqo2, Nqo1, Nqo9 and Nqo4. {ECO:0000269|PubMed:16469879, ECO:0000269|PubMed:16584177}.
Subcellular location: Cell membrane {ECO:0000305|PubMed:16469879}; Peripheral membrane protein {ECO:0000305|PubMed:16469879}; Cytoplasmic side {ECO:0000305|PubMed:16469879}.
Domain: Has a similar fold to the mitochondrial iron chaperone frataxin. {ECO:0000305|PubMed:16469879}.
Similarity: Belongs to the complex I Nqo15 family. {ECO:0000305}.

Annotations taken from UniProtKB at the EBI.