Cytochrome Biogenesis

Cytochrome c-type biogenesis protein CcmH precursor (ccmH )

function					may be required in biogenesis of c-type cytochrome, possible subunit of heme lyase
interaction
regulation
MW					39089 Da; 350 aa

c-type cytochrome biogenesis protein CycY precursor (cycY )

function					divalent cation tolerance
interaction
regulation
MW					12331 Da; 112 aa

Cytochrome c-type biogenesis protein NrfF precursor (nrfF )

function					may be required for biogenesis of c-type cytochrome, possible subunit of a heme lyase
interaction
regulation
MW					14523 Da; 127 aa

Cytochromes

Soluble cytochrome b₅₆₂ precursor (cybC )

function					Electron-transport protein of unknown function. Its midpoint redox potential is about +180 mV.
interaction
regulation
structure					PDB
MW					14061 Da; 128 aa

Cytochrome c-type protein NapB precursor (napB )

function					small subunit of the periplasmic nitrate reductase (NAP), may have role in anaerobic metabolism and essential for nitrate assimilation interactions heterodimer with NapA, NapAB receives electrons from membrane anchored tetrahem NapC-protein
interaction					binds two heme groups per molecule
cofactors
regulation					expressed at high levels only during aerobic growth
					heterodimer of catalytic subunit and a cytochrome c<
MW					16296 Da; 156 aa

Cytochrome c₅₅₂precursor (nrfA )

function					terminal reductase of the formate-dependent pathway for nitrite reduction to ammonia interactions
interaction					binds five heme groups per molecule
regulation					induction in presence of nitrite, subject to glucose and nitrate repression
structure					PDB
MW					53703 Da; 478 aa

Cytochrome c-type protein NrfB precursor (nrfB )

function					terminal reductase of the formate-dependent pathway for nitrite reduction to ammonia
interaction					binds five heme groups per molecule
regulation
MW					20714 Da; 188 aa