cd01714: ETF_beta (this model, PSSM-Id:238847 is obsolete and has been replaced by 467487)
The electron transfer flavoprotein (ETF) serves as a specific electron acceptor for various mitochondrial dehydrogenases. ETF transfers electrons to the main respiratory chain via ETF-ubiquinone oxidoreductase. ETF is an heterodimer that consists of an alpha and a beta subunit which binds one molecule of FAD per dimer . A similar system also exists in some bacteria. The homologous pair of proteins (FixA/FixB) are essential for nitrogen fixation. The beta subunit protein is distantly related to and forms a heterodimer with the alpha subunit.
Jiyao W et al.(2023). "The conserved domain database in 2023.",