Gene Symbol: PSBO2
Description: photosystem II subunit O-2
Alias: MSP-2, OEC33, OXYGEN EVOLVING COMPLEX SUBUNIT 33 KDA, PHOTOSYSTEM II SUBUNIT O-2, PSBO, PSBO-2, photosystem II subunit O-2, photosystem II subunit O-2
Species: thale cress
Products:     PSBO2

Top Publications

  1. Murakami R, Ifuku K, Takabayashi A, Shikanai T, Endo T, Sato F. Functional dissection of two Arabidopsis PsbO proteins: PsbO1 and PsbO2. FEBS J. 2005;272:2165-75 pubmed
    ..Arabidopsis thaliana has two psbO genes that express two PsbO proteins; PsbO1 and PsbO2. We reported previously that a mutant plant that lacked PsbO1 (psbo1) showed considerable growth retardation ..
  2. Yi X, McChargue M, Laborde S, Frankel L, Bricker T. The manganese-stabilizing protein is required for photosystem II assembly/stability and photoautotrophy in higher plants. J Biol Chem. 2005;280:16170-4 pubmed
    ..genes that encode the manganese-stabilizing protein of photosystem II in Arabidopsis thaliana, MSP-1 (encoded by psbO-1, At5g66570), and MSP-2 (encoded by psbO-2, At3g50820)...
  3. Lundin B, Hansson M, Schoefs B, Vener A, Spetea C. The Arabidopsis PsbO2 protein regulates dephosphorylation and turnover of the photosystem II reaction centre D1 protein. Plant J. 2007;49:528-39 pubmed
    ..Two T-DNA insertion mutant lines deficient in either the PsbO1 or the PsbO2 protein were retarded in growth in comparison with the wild type, while differing from each other phenotypically...
  4. Lundin B, Nurmi M, Rojas Stuetz M, Aro E, Adamska I, Spetea C. Towards understanding the functional difference between the two PsbO isoforms in Arabidopsis thaliana--insights from phenotypic analyses of psbo knockout mutants. Photosynth Res. 2008;98:405-14 pubmed publisher
    ..photosystem II (PSII) complex is represented by two isoforms in Arabidopsis thaliana, namely PsbO1 and PsbO2. Recent analyses of psbo1 and psbo2 knockout mutants have brought insights into their roles in photosynthesis and ..
  5. Xu Y, Wang B, Zhu Y. Identification of proteins expressed at extremely low level in Arabidopsis leaves. Biochem Biophys Res Commun. 2007;358:808-12 pubmed
    ..Our results suggest that polyU or similar media may be combined with 2-DE techniques to identify cellular proteins with extremely low transcription levels to fulfill specific research needs. ..
  6. Allahverdiyeva Y, Mamedov F, Holmstrom M, Nurmi M, Lundin B, Styring S, et al. Comparison of the electron transport properties of the psbo1 and psbo2 mutants of Arabidopsis thaliana. Biochim Biophys Acta. 2009;1787:1230-7 pubmed publisher
    ..Arabidopsis) revealed two psbO genes (At5g66570 and At3g50820) which encode two distinct PsbO isoforms: PsbO1 and PsbO2, respectively...
  7. Karamoko M, Cline S, Redding K, Ruiz N, Hamel P. Lumen Thiol Oxidoreductase1, a disulfide bond-forming catalyst, is required for the assembly of photosystem II in Arabidopsis. Plant Cell. 2011;23:4462-75 pubmed publisher
    ..In a yeast two-hybrid assay, the thioredoxin-like domain of LTO1 interacts with PsbO, a lumenal PSII subunit known to be disulfide bonded, and a recombinant form of the molecule can introduce a ..
  8. Dwyer S, Chow W, Yamori W, Evans J, Kaines S, Badger M, et al. Antisense reductions in the PsbO protein of photosystem II leads to decreased quantum yield but similar maximal photosynthetic rates. J Exp Bot. 2012;63:4781-95 pubmed publisher
    ..25 and 60% of wild-type (WT) total PsbO protein content, with the PsbO1 isoform being more strongly reduced than PsbO2. These changes coincided with a decrease in functional PSII content...
  9. Murakami R, Ifuku K, Takabayashi A, Shikanai T, Endo T, Sato F. Characterization of an Arabidopsis thaliana mutant with impaired psbO, one of two genes encoding extrinsic 33-kDa proteins in photosystem II. FEBS Lett. 2002;523:138-42 pubmed
    ..Arabidopsis thaliana mutant with a defect in one of the genes for the 33-kDa proteins, psbO, and an intact gene (psbO2)...

More Information


  1. Hall M, Mata Cabana A, Akerlund H, Florencio F, Schröder W, Lindahl M, et al. Thioredoxin targets of the plant chloroplast lumen and their implications for plastid function. Proteomics. 2010;10:987-1001 pubmed publisher
    ..We show that the redox state of thiols is decisive for degradation of the extrinsic PsbO1 and PsbO2 subunits of photosystem II...