The cytochrome c8 involved in the nitrite reduction pathway acts also as electron donor to the photosynthetic reaction center in Rubrivivax gelatinosus

►The third cytochrome c8 was found in R. gelatinosus. ►The gene for cytochrome c8 is in the nitrite reductase gene cluster as nirM. ►NirM could donate electron to RC in R. gelatinosus. ►NirM was overexpressed in deletion mutant of soluble electron donors.