About Products Protein Database Contact

nqo4

Gene
nqo4
Protein
NADH-quinone oxidoreductase subunit 4
Organism
Paracoccus denitrificans
Length
412 amino acids
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 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.
Similarity
Belongs to the complex I 49 kDa subunit family.
Mass
46.674 kDa
Sequence
MDGDIRKNSLDDGSMDALTGEQSIRNFNINFGPQHPAAHGLLRMVLELDGEIVERADPHIGLLHRGTEKLMESRTYLQNLPYLDRLDYVAPMNQEHAWCLAIERLTGTVIPRRASLIRVLYSEIGRILNHLMGVTTGAMDVGALTPPLWGFEAREELMIFYERACGARLHAAYFRPGGVHQDLPPDLLDDIEEWCERFPKLVDDLDTLLTENRIFKQRLVDIGIVTEADALDWGYTGVMVRGSGLAWDLRRSQPYECYDEFDFQIPVGRNGDCYDRYLCRMAEMRESCKIMQQAVQKLRAEPAGDVLARGKLTPPRRAEMKRDMESLIHHFKLYTEGFKVPAGEVYAAVEGPKGEFGVYLVADGTNKPWRAKLRAPGFAHLQSIDWMSRGHMLADVPAIIATLDIVFGEVDR

Gene
nqo4
Protein
NADH-quinone oxidoreductase subunit 4
Organism
Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579)
Length
409 amino acids
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 Nqo4 subunit may contain the quinone-binding site.
Similarity
Belongs to the complex I 49 kDa subunit family.
Mass
46.371 kDa
Sequence
MREEFLEEIPLDAPPEEAKELRTEVMTLNVGPQHPSTHGVLRLMVTLSGEEVLEVVPHIGYLHTGFEKTMEHRTYLQNITYTPRMDYLHSFAHDLAYALAVEKLLGAVVPPRAETIRVILNELSRLASHLVFLGTGLLDLGALTPFFYAFRERETILDLFEWVTGQRFHHNYIRIGGVKEDLPEEFVPELKKLLEVLPHRIDEYEALFAESPIFYERARGVGVIPPEVAIDLGLTGGSLRASGVNYDVRKAYPYSGYETYTFDVPLGERGDVFDRMLVRIREMRESVKIIKQALERLEPGPVRDPNPQITPPPRHLLETSMEAVIYHFKHYTEGFHPPKGEVYVPTESARGELGYYIVSDGGSMPYRVKVRAPSFVNLQSLPYACKGEQVPDMVAIIASLDPVMGDVDR