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Gene Review

PSBO1  -  PS II oxygen-evolving complex 1

Arabidopsis thaliana

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High impact information on PSBO-1

  • The native OEE1 precursor was imported into isolated chloroplasts, processed and localized in the thylakoid lumen [1].
  • Replacement of the OEE1 transit peptide with the transit peptide of the small subunit of ribulose-1,5-bisphosphate carboxylase, a stromal protein, resulted in redirection of mature OEE1 into the stromal compartment of the chloroplast [1].
  • Recently, competition studies showed that there are two pathways for protein transport into the thylakoid lumen and that plastocyanin and OE33 are on the same pathway (Cline, K., Henry, R., Li, C., and Yuan, J. (1993) EMBO J. 12, 4105-4114) [2].
  • The integration of chlorophyll a/b-binding (LHCP) polypeptides and the translocation of the 33-kD oxygen-evolving enhancer protein (OEE33) have been previously shown to occur in chloroplast extracts containing stroma, thylakoids, ATP, and MgCl2 [3].
  • A streptomycin-resistance gene was fused to a cDNA construct that encodes an unstable mutant of the OE33 protein [4].

Biological context of PSBO-1

  • The cDNA clones and antibodies prepared against OEE1 were used as probes to examine the expression of the oee1 gene with respect to regulation by light, organ specificity, and ripening stage of tomato fruit [5].
  • We have identified and isolated cDNA clones of the 33 kDa protein of the oxygen-evolving complex (OEE1) from Lycopersicon esculentum (tomato) and Arabidopsis thaliana and determined their nucleotide sequences [5].
  • Therefore we concluded that both the lower expression level and the inferior functionality of PsbO2 are responsible for the phenotype observed in psbo1 [6].

Other interactions of PSBO-1

  • The MSP1 and MSP2 promoters were used to successfully complement and restore the male transmission of the gametophytic two-in-one (tio) mutant that is cytokinesis-defective at first microspore division [7].


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