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CYTOCHROME c 548 IN NOSTOC SP. (CYANOPHYCEAE): AN ELECTRON ACCEPTOR FROM REDUCED NADP IN THE DARK 1
Author(s) -
Pulich Warren
Publication year - 1977
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/j.1529-8817.1977.tb02884.x
Subject(s) - cytochrome , biology , cytochrome c , ferredoxin , cytochrome b6f complex , cytochrome b , nostoc , cytochrome f , electron acceptor , electron transport chain , reductase , cytochrome p450 reductase , cyanobacteria , biochemistry , coenzyme q – cytochrome c reductase , photochemistry , photosynthesis , enzyme , photosystem i , bacteria , chemistry , gene , apoptosis , photosystem ii , genetics , mitochondrial dna
A c‐type, carbon monoxide‐binding cytochrome was isolated and studied from an endophytic Nostoc sp. Enzymatic transfer of electrons from NADPH to this cytochrome was demonstrated in cell‐free preparations under dark, anaerobic conditions, probably mediated by NADPH‐cytochrome reductase or ferredoxin‐NADP reductase present in the extracts. This cytochrome, with an α‐peak at 548 nm, had physicochemical properties similar to the low potential c‐type cytochrome, cytochrome c 549 , previously described by other workers from Anacystis nidulans. The participation of such c‐cytochromes in dark electron transport, possibly respiratory, of bluegreen algae is strongly indicated.