Protein
NAD(P)H-quinone oxidoreductase chain 4 3
Organism
Synechococcus sp. (strain ATCC 27264 / PCC 7002 / PR-6)
Function
NDH-1 shuttles electrons from NAD(P)H, 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 plastoquinone. 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 subunit 4 family.
Sequence
MAPDFPWLTAIIALPALSTLLIPLLPDKEGKTVRWYALIVGLVDFALMCFAFWQHFDPQATEFQLAESYRWLPSLGIQWSVAVDGISAPLVLLAGFVTTLAMFSAWQVNQRPRLFYALMLLLYSAQIGVFVAKDLFLFFLMWEIELIPVYLLVCIWGGKRRRYAAMKFLLYTAAASIFILVAALALSLNLPGGPNFDLGAIAQQDYPLGLQMWLYAGLLVSFGVKLAIFPLHTWLPDAHGEASSPVSMLLAGVLLKMGGYGLMRFNMELLPDAHVRFAPLLVILGVVNIVYGAFSSFGQTNMKRRLAYSSVSHMGFVLIGIASFTDLGINGAMLQMLSHGLIASVLFFLAGVTYDRTKTMVLAEVGGLGQVMPKVFAMFTVGALASLALPGMSGFVGELSVFVGLASSDTYSATFRTITVFLAAVGVILTPIYLLSMLREMFYTREMDLSCDLGQPTNVAIAGNAPVCFGNDCVLPSNAIYEDARPREIFIATCFTVLIIGVGLYPKLLMQMYDAKTQTLNTSVRQAQAIAKQPSEPIAALQAPELTMPH