A New Oxygen Sensitivity and Its Potential Application in Photosynthetic H2 Production View Full Text


Ontology type: schema:Chapter     


Chapter Info

DATE

2003

AUTHORS

James W. Lee , Elias Greenbaum

ABSTRACT

We have discovered a new competitive pathway for O2 sensitivity in algal H2 production that is distinct from the O2 sensitivity of hydrogenase per se. This O2 sensitivity is apparently linked to the photosynthetic H2 production pathway that is coupled to proton translocation across the thylakoid membrane. Addition of the proton uncoupler carbonyl cyanide-p-trifluoro-methoxy-phenylhydrazone eliminates this mode of O2 inhibition on H2 photoevolution. This newly discovered inhibition is most likely owing to background O2 that apparently serves as a terminal electron acceptor in competition with the H2 production pathway for photosynthetically generated electrons from water splitting. This O2-sensitive H2 production electron transport pathway was inhibited by 3[3,4-dichlorophenyl]1,1-dimethylurea. Our experiments demonstrated that this new pathway is more sensitive to O2 than the traditionally known O2 sensitivity of hydrogenase. This discovery provides new insight into the mechanism of O2 inactivation of hydrogenase and may contribute to the development of a more-efficient and robust system for photosynthetic H2 production. More... »

PAGES

303-313

References to SciGraph publications

  • 1997-03. Oxygen sensitivity of algal H2- production in APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
  • 1995-09. Temperature effect on production of hydrogen and oxygen byChlamydomonas cold strain CCMP1619 and wild-type 137c in APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
  • Book

    TITLE

    Biotechnology for Fuels and Chemicals

    ISBN

    978-1-4612-6592-4
    978-1-4612-0057-4

    Author Affiliations

    Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1007/978-1-4612-0057-4_25

    DOI

    http://dx.doi.org/10.1007/978-1-4612-0057-4_25

    DIMENSIONS

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