Differences in the interactions between the subunits of photosystem II dependent on D1 protein variants in the thermophilic cyanobacterium Thermosynechococcus elongatus.

The Journal of Biological Chemistry
Miwa SugiuraAlain Boussac

Abstract

The main cofactors involved in the oxygen evolution activity of Photosystem II (PSII) are located in two proteins, D1 (PsbA) and D2 (PsbD). In Thermosynechococcus elongatus, a thermophilic cyanobacterium, the D1 protein is encoded by either the psbA(1) or the psbA(3) gene, the expression of which is dependent on environmental conditions. It has been shown that the energetic properties of the PsbA1-PSII and those of the PsbA3-PSII differ significantly (Sugiura, M., Kato, Y., Takahashi, R., Suzuki, H., Watanabe, T., Noguchi, T., Rappaport, F., and Boussac, A. (2010) Biochim. Biophys. Acta 1797, 1491-1499). In this work the structural stability of PSII upon a PsbA1/PsbA3 exchange was investigated. Two deletion mutants lacking another PSII subunit, PsbJ, were constructed in strains expressing either PsbA1 or PsbA3. The PsbJ subunit is a 4-kDa transmembrane polypeptide that is surrounded by D1 (i.e. PsbA1), PsbK, and cytochrome b(559) (Cyt b(559)) in existing three-dimensional models. It is shown that the structural properties of the PsbA3/ΔPsbJ-PSII are not significantly affected. The polypeptide contents, the Cyt b(559) properties, and the proportion of PSII dimer were similar to those found for PsbA3-PSII. In contrast, in PsbA1/Δ...Continue Reading

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Citations

Mar 1, 2012·The Journal of Biological Chemistry·Miwa SugiuraAlain Boussac
Dec 29, 2012·The Journal of Biological Chemistry·David J VinyardG Charles Dismukes
Jan 7, 2014·Biochimica Et Biophysica Acta·Miwa Sugiura, Alain Boussac
Nov 26, 2015·Biochimica Et Biophysica Acta·Steffen HeinzMarc Nowaczyk
Mar 6, 2012·Biochimica Et Biophysica Acta·Marc M NowaczykMatthias Rögner
Jun 1, 2016·Frontiers in Plant Science·Daniel A WeiszHimadri B Pakrasi
May 20, 2020·The ISME Journal·Christen L GrettenbergerAnne D Jungblut

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