Identification of an oxygenic reaction center psbadc operon in the cyanobacterium gloeobacter violaceus PCC 7421

Tuan A. Nguyen, Jasmina Brescic, David J. Vinyard, Thenappan Chandrasekar, G Charles Dismukes

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Gloeobacter violaceus, the earliest diverging oxyphotobacterium (cyanobacterium) on the 16S ribosomal RNA tree, has five copies of the photosystem II psbA gene encoding the D1 reaction center protein subunit. These copies are widely distributed throughout the 4.6 Mbp genome with only one copy colocalizing with other PSII subunits, in marked contrast to all other psbA genes in all publicly available sequenced genomes. A clustering of two other psb genes around psbA3 (glr2322) is unique to Gloeobacter. We provide experimental proof for the transcription of a psbA3DC operon, encoding three of the five reaction center core subunits (D1, D2, and CP43). This is the first example of a transcribed gene cluster containing the D1/D2 or D1/D2/CP43 subunits of PSII in an oxygenic phototroph (prokaryotic or eukaryotic). Implications for the evolution of oxygenic photosynthesis are discussed.

Original languageEnglish
Pages (from-to)35-38
Number of pages4
JournalMolecular Biology and Evolution
Volume29
Issue number1
DOIs
Publication statusPublished - Jan 2012

Fingerprint

Gloeobacter violaceus
Cyanobacteria
operon
Operon
cyanobacterium
Gloeobacter
gene
Genome
16S Ribosomal RNA
Genes
Photosystem II Protein Complex
genome
genes
Protein Subunits
Photosynthesis
protein subunits
Multigene Family
multigene family
photosystem II
Cluster Analysis

Keywords

  • Gloeobacter violaceus
  • Photosystem II
  • Type 2 reaction center

ASJC Scopus subject areas

  • Genetics
  • Molecular Biology
  • Ecology, Evolution, Behavior and Systematics

Cite this

Identification of an oxygenic reaction center psbadc operon in the cyanobacterium gloeobacter violaceus PCC 7421. / Nguyen, Tuan A.; Brescic, Jasmina; Vinyard, David J.; Chandrasekar, Thenappan; Dismukes, G Charles.

In: Molecular Biology and Evolution, Vol. 29, No. 1, 01.2012, p. 35-38.

Research output: Contribution to journalArticle

Nguyen, Tuan A. ; Brescic, Jasmina ; Vinyard, David J. ; Chandrasekar, Thenappan ; Dismukes, G Charles. / Identification of an oxygenic reaction center psbadc operon in the cyanobacterium gloeobacter violaceus PCC 7421. In: Molecular Biology and Evolution. 2012 ; Vol. 29, No. 1. pp. 35-38.
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