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ecce/ periplasmic proteins/ electron transport
Proteins Involved in Cytochrome Biogenesis
Cytochromes



Cytochrome Biogenesis

Cytochrome c-type biogenesis protein CcmH precursor (ccmH )
functionmay be required in biogenesis of c-type cytochrome, possible subunit of heme lyase
interaction 
regulation 
MW39089 Da; 350 aa


c-type cytochrome biogenesis protein CycY precursor (cycY )
functiondivalent cation tolerance
interaction 
regulation 
MW12331 Da; 112 aa


Cytochrome c-type biogenesis protein NrfF precursor (nrfF )
functionmay be required for biogenesis of c-type cytochrome, possible subunit of a heme lyase
interaction 
regulation 
MW14523 Da; 127 aa


Cytochromes

Soluble cytochrome b562 precursor (cybC )
functionElectron-transport protein of unknown function. Its midpoint redox potential is about +180 mV.
interaction 
regulation 
structurePDB
MW14061 Da; 128 aa


Cytochrome c-type protein NapB precursor (napB )
functionsmall 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
interactionbinds two heme groups per molecule
cofactors 
regulationexpressed at high levels only during aerobic growth
 heterodimer of catalytic subunit and a cytochrome c<
MW16296 Da; 156 aa


Cytochrome c552precursor (nrfA )
functionterminal reductase of the formate-dependent pathway for nitrite reduction to ammonia interactions
interactionbinds five heme groups per molecule
regulationinduction in presence of nitrite, subject to glucose and nitrate repression
structurePDB
MW53703 Da; 478 aa


Cytochrome c-type protein NrfB precursor (nrfB )
functionterminal reductase of the formate-dependent pathway for nitrite reduction to ammonia
interactionbinds five heme groups per molecule
regulation 
MW20714 Da; 188 aa