nqo9

NADH-quinone oxidoreductase subunit 9

230 amino acids

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 believed to be 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.

Belongs to the complex I 23 kDa subunit family.

27.12 kDa

MPGKPVNLASPNERKLNFWERLYLPAVVQGLAYTWRKMRSPRYTFQYPDELWYPPDSYRGRPVLVEENGRPRCVACGLCARACPPLAISMQAKEVDDVKEREPAWFEINMLRCIYCGYCEEVCPEEAIVMSKEYDLTFQSRDEAIFGLEKLLVPAERLKDRLEWLDRYKDPQYGQHWEFRKENNLHSLKDRPFLKWLLEEEGMEELKSTHLRPEEPVAAERSWGGVRAEG

nqo9

NADH-quinone oxidoreductase subunit 9

182 amino acids

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 role of the Nqo9 subunit appears to provide a 'connecting chain' of two clusters between cluster N5 and the terminal cluster N2, and to stabilize the structure of the complex by interacting with other subunits.

Belongs to the complex I 23 kDa subunit family.

20.08 kDa

MTLKALAQSLGITLKYLFSKPVTVPYPDAPVALKPRFHGRHVLTRHPNGLEKCIGCSLCAAACPAYAIYVEPAENDPENPVSAGERYAKVYEINMLRCIFCGLCEEACPTGAIVLGYDFEMADYEYSDLVYGKEDMLVDVVGTKPQRREAKRTGKPVKVGYVVPYVRPELEGFKAPTEGGKR

nqo9

NADH-quinone oxidoreductase subunit 9

163 amino acids

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 believed to be ubiquinone. 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.

Belongs to the complex I 23 kDa subunit family.

18.96 kDa

MAFDFARATKYFLMWDFIKGFGLGMRYFVSPKPTLNYPHEKGPLSPRFRGEHALRRYPNGEERCIACKLCEAVCPAQAITIDAERREDGSRRTTRYDIDMTKCIYCGFCQEACPVDAIVEGPNFEYATETREELFYDKQKLLANGERWEAEIARNLQLDAPYR