The psbC start codon in Synechocystis sp. PCC 6803

Shelly D. Carpenter, Jeroen Charite, Beth Eggers, Willem Vermaas

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


The translation start codon for psbC, the gene encoding CP43, a chlorophyll-binding protein of photosystem II, has been identified for the cyanobacterium Synechosystis sp. PCC 6803 using site-directed mutagenesis. An AUG codon, about 50 bases upstream from the end of psbD-I had previously been assumed to be the translation start site of psbC. However, the fact that the AUG codon is not present in psbC from several other organisms, whereas a GUG codon 14 bases upstream from the end of psbD-I is strictly conserved suggests that CP43 translation starts at the latter codon. Mutation of GUG, but not of AUG, led to a loss of CP43 and photoautotrophic growth, indicating that the GUG codon is the sole initiation site for translation of the CP43 protein in Synechocystis sp. PCC 6803.

Original languageEnglish (US)
Pages (from-to)135-137
Number of pages3
JournalFEBS Letters
Issue number1
StatePublished - Jan 15 1990


  • CP43
  • Cyanobacterium
  • Gene, psbC
  • Photosystem II
  • Translation initiation

ASJC Scopus subject areas

  • Biophysics
  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Genetics
  • Cell Biology


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