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Gene Review

psbB  -  photosystem II P680 chlorophyll A apoprotein

Arabidopsis thaliana

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High impact information on psbB

  • In atmak3-1, the synthesis of the plastome-encoded photosystem II core proteins D1 and CP47 is affected, resulting in a decrease in the abundance of thylakoid multiprotein complexes [1].
  • In vivo protein labeling, in vitro phosphorylation, and immunoblot experiments revealed that the psbB gene product (CP47) and an 8-kD phosphoprotein, the psbH gene product (PsbH), are absent in mutant plants [2].
  • Immunological analysis of the photosystem II protein complement indicated that significant losses of the CP47, CP43, and D1 proteins occurred upon the loss of the manganese-stabilizing proteins [3].
  • Here we describe the identification of the HCF107 gene that is involved in the 5'-end processing/stability and/or translation of the psbH gene and in the translation of the psbB gene [4].
  • Expression of the genes of plastidial psbB operon (psbB-psbT-psbH-petB-petD) involves multiple processing events and formation of several mono-, di- and multi-cistronic transcripts which are further regulated by differential stability and expression [4].

Other interactions of psbB

  • Thus, by specific transcription initiation at the psbN gene promoter, SIG3-PEP holoenzyme could also influence the expression of the psbB operon by producing psbT antisense RNA [5].

Analytical, diagnostic and therapeutic context of psbB

  • (3) The ratio of the light-harvesting complex II apoproteins (LHCP) to 47-kDa chlorophyll a protein (CP47), which was estimated by the results of immunoblotting, increased by 40% [6].


  1. Cytoplasmic N-terminal protein acetylation is required for efficient photosynthesis in Arabidopsis. Pesaresi, P., Gardner, N.A., Masiero, S., Dietzmann, A., Eichacker, L., Wickner, R., Salamini, F., Leister, D. Plant Cell (2003) [Pubmed]
  2. The nucleus-encoded HCF107 gene of Arabidopsis provides a link between intercistronic RNA processing and the accumulation of translation-competent psbH transcripts in chloroplasts. Felder, S., Meierhoff, K., Sane, A.P., Meurer, J., Driemel, C., Plücken, H., Klaff, P., Stein, B., Bechtold, N., Westhoff, P. Plant Cell (2001) [Pubmed]
  3. The manganese-stabilizing protein is required for photosystem II assembly/stability and photoautotrophy in higher plants. Yi, X., McChargue, M., Laborde, S., Frankel, L.K., Bricker, T.M. J. Biol. Chem. (2005) [Pubmed]
  4. The nuclear gene HCF107 encodes a membrane-associated R-TPR (RNA tetratricopeptide repeat)-containing protein involved in expression of the plastidial psbH gene in Arabidopsis. Sane, A.P., Stein, B., Westhoff, P. Plant J. (2005) [Pubmed]
  5. Nucleus-encoded plastid sigma factor SIG3 transcribes specifically the psbN gene in plastids. Zghidi, W., Merendino, L., Cottet, A., Mache, R., Lerbs-Mache, S. Nucleic Acids Res. (2007) [Pubmed]
  6. Overexpression of chlorophyllide a oxygenase (CAO) enlarges the antenna size of photosystem II in Arabidopsis thaliana. Tanaka, R., Koshino, Y., Sawa, S., Ishiguro, S., Okada, K., Tanaka, A. Plant J. (2001) [Pubmed]
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