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Gene Review

psaC  -  photosystem I iron-sulfur center

Chlamydomonas reinhardtii

 
 
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High impact information on psaC

  • The downregulation of translation occurs at some early stage since it arises from the interaction between unassembled PsaA and PsaC polypeptides and 5' untranslated regions of psaA and psaC mRNAs, respectively [1].
  • The small chloroplast open reading frame ORF43 (ycf7) of the green unicellular alga Chlamydomonas reinhardtii is cotranscribed with the psaC gene and ORF58 [2].
  • Using a particle gun, wild type C. reinhardtii cells have been transformed with a plasmid carrying the psaC gene disrupted by an aadA gene cassette designed to express spectinomycin/streptomycin resistance in the chloroplast [3].
  • We conclude that the iron sulfur binding protein encoded by the psaC gene is an essential component, both for photochemical activity and for stable assembly of PSI [3].
  • Targetted gene disruption mutants of loci required for photosynthesis, tscA and psaC, were thus obtained [4].
 

Biological context of psaC

  • We find no instance of a strain that can perform photosynthesis in the absence of photosystem I. The F8 strain harbored a small amount of photosystem I, and it could fix CO2 and grow slowly, but it lost these abilities after deletion of either psaA or psaC; these activities could be restored to the F8-psaADelta mutant by reintroduction of psaA [5].
 

Analytical, diagnostic and therapeutic context of psaC

  • Southern blot analysis of total cell DNA of the transformants shows that the wild type psaC gene has been replaced by the interrupted psaC gene through homologous recombination [3].

References

 
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