Temperature-sensitive PSII and promiscuous PSI as a possible solution for sustainable photosynthetic hydrogen production

Yuval Mazor, Hila Toporik, Nathan Nelson

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Sustainable hydrogen production in cyanobacteria becomes feasible as a result of our recent studies of the structure of photosystem I encoding operon in a marine phage. We demonstrated that the fused PsaJF subunit from the phage, substituted for the two separate subunits in Synechocystis, enabled the mutated PSI to accept electrons from additional electron donors such as respiratory cytochromes. In this way, a type of photorespiration was created in which the cell consumes organic material through respiratory processes and PSI serves as a terminal electron acceptor, substituting for cytochrome oxidase. We designed a hydrogen-producing bioreactor in which this type of photorespiration could utilize the organic material of the cell as an electron source for H2 production. We propose, in parallel, to engineer cyanobacterial and/or algal strains with a temperature-sensitive PSII and enhanced respiration rates to achieve efficient and sustainable hydrogen production. This article is part of a Special Issue entitled: Photosynthesis Research for Sustainability: from Natural to Artificial.

Original languageEnglish (US)
Pages (from-to)1122-1126
Number of pages5
JournalBiochimica et Biophysica Acta - Bioenergetics
Volume1817
Issue number8
DOIs
StatePublished - Aug 1 2012
Externally publishedYes

Keywords

  • Bioreactor
  • Cyanobacterium
  • Electron transfer
  • Hydrogen production
  • Micro-alga
  • Photosynthetic reaction center

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Cell Biology

Fingerprint Dive into the research topics of 'Temperature-sensitive PSII and promiscuous PSI as a possible solution for sustainable photosynthetic hydrogen production'. Together they form a unique fingerprint.

  • Cite this