Role of Na/sub 2/S in anoxygenic photosynthesis and H/sub 2/ production in the cyanobacterium Nostoc Muscorum

Journal Article · Fri Sep 28 04:00:00 EDT 1984 · Biochem. Biophys. Res. Commun.; (United States)

DOI:https://doi.org/10.1016/S0006-291X(84)80251-X· OSTI ID:5956684

Fry, I; Robinson, A E; Spath, S; Packer, L

Na/sub 2/S is known to support anoxygenic photosynthesis in some strains of cyanobacteria and to stimulate H/sub 2/ production in N/sub 2/ fixing filaments of Nostoc muscorum. We have shown electron transfer between Na/sub 2/S and Photosystem I to be dependent on cytochrome b/sub 559/ which was detected only in vegetative cells. An electron mediator was required to support Na/sub 2/S driven nitrogenase activity in isolated heterocysts. Na/sub 2/S was also found to deplete the ATP pool, probably by inhibiting electron transfer from Photosystem I. 14 references, 4 figures.

• Research Organization: Lawrence Berkeley Lab., CA
• OSTI ID: 5956684
• Journal Information: Biochem. Biophys. Res. Commun.; (United States), Journal Name: Biochem. Biophys. Res. Commun.; (United States) Vol. 123:3; ISSN BBRCA
• Country of Publication: United States
• Language: English

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59 BASIC BIOLOGICAL SCIENCES
ALKALI METAL COMPOUNDS
ATP
BIOCHEMICAL REACTION KINETICS
BIOLOGICAL EFFECTS
BIOSYNTHESIS
CHALCOGENIDES
CHEMICAL REACTIONS
CYANOBACTERIA
CYTOCHROMES
ELECTRON TRANSFER
ENZYME ACTIVITY
ENZYMES
HYDROGEN PRODUCTION
KINETICS
MICROORGANISMS
NITRO-GROUP DEHYDROGENASES
NITROGENASE
NUCLEOTIDES
ORGANIC COMPOUNDS
OXIDOREDUCTASES
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PHOTOSYNTHETIC REACTION CENTERS
PIGMENTS
REACTION KINETICS
SODIUM COMPOUNDS
SODIUM SULFIDES
SULFIDES
SULFUR COMPOUNDS
SYNTHESIS