Evidence for a stable association of Psb30 (Ycf12) with photosystem II core complex in the cyanobacterium Synechocystis sp. PCC 6803

Natsuko Inoue-Kashino, Takeshi Takahashi, Akiko Ban, Miwa Sugiura, Yuichiro Takahashi, Kazuhiko Satoh, Yasuhiro Kashino

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Ycf12 (Psb30) is a small hydrophobic subunit of photosystem II (PS II) complexes found in the cyanobacterium, Thermosynechococcus elongatus. However, earlier intense proteomic analysis on the PS II complexes from the cyanobacterium, Synechocystis 6803, could not detect Psb30. In this work, we generated a mutant of Synechocystis 6803 in which a hexa-histidine tag was fused to the C-terminus of Synechocystis Psb30. The mutant accumulated fully functional PS II complexes. Purification of Psb30 by metal affinity chromatography from thylakoid extracts resulted in co-purification of an oxygen-evolving PS II complex with normal subunit composition. This result indicates that Psb30 is expressed and stably associated with the PS II complex in Synechocystis. The histidine-tagged Psb30 in the purified PS II complex was not detected by staining or anti-polyhistidine antibodies. We also generated a mutant in which ycf12 was disrupted. The mutant grew photosynthetically and showed no significant phenotype under moderate growth conditions. Purified PS II complexes from the disruptant showed an oxygen-evolving activity comparable to wild type under low irradiance. However, it showed a remarkably lower activity than wild type under high irradiance. Thus Psb30 is required for the efficient function of PS II complexes, particularly under high irradiance conditions.

Original languageEnglish
Pages (from-to)323-335
Number of pages13
JournalPhotosynthesis Research
Volume98
Issue number1-3
DOIs
Publication statusPublished - Oct 2008

Fingerprint

Synechocystis sp. PCC 6803
Synechocystis
Photosystem II Protein Complex
Cyanobacteria
photosystem II
Association reactions
mutants
histidine
Histidine
Purification
Thermosynechococcus elongatus
Oxygen
oxygen
Affinity chromatography
Thylakoids
affinity chromatography
Affinity Chromatography
thylakoids
Proteomics
proteomics

Keywords

  • Low-molecular-weight polypeptide
  • Photosystem II
  • Psb30
  • PsbY
  • Synechocystis 6803
  • Ycf12

ASJC Scopus subject areas

  • Plant Science
  • Cell Biology
  • Biochemistry

Cite this

Evidence for a stable association of Psb30 (Ycf12) with photosystem II core complex in the cyanobacterium Synechocystis sp. PCC 6803. / Inoue-Kashino, Natsuko; Takahashi, Takeshi; Ban, Akiko; Sugiura, Miwa; Takahashi, Yuichiro; Satoh, Kazuhiko; Kashino, Yasuhiro.

In: Photosynthesis Research, Vol. 98, No. 1-3, 10.2008, p. 323-335.

Research output: Contribution to journalArticle

Inoue-Kashino, Natsuko ; Takahashi, Takeshi ; Ban, Akiko ; Sugiura, Miwa ; Takahashi, Yuichiro ; Satoh, Kazuhiko ; Kashino, Yasuhiro. / Evidence for a stable association of Psb30 (Ycf12) with photosystem II core complex in the cyanobacterium Synechocystis sp. PCC 6803. In: Photosynthesis Research. 2008 ; Vol. 98, No. 1-3. pp. 323-335.
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