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Published on May 15, 2009; 10.1104/pp.109.136812

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Received February 10, 2009
Accepted May 11, 2009

LPA66 Is Required for Editing psbF Chloroplast Transcripts in Arabidopsis

Wenhe Cai , Daili Ji , Lianwei Peng , Jinkui Guo , Jinfang Ma , Meijuan Zou , Congming Lu , and Lixin Zhang *

Photosynthesis Research Center, Key Laboratory of Photosynthesis and Environmental Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; School of Life Sciences, Lanzhou University, Lanzhou 73000, China

* Corresponding author; email: zhanglixin{at}ibcas.ac.cn.

To gain insight into the molecular mechanism of RNA editing, we have characterized the low psii accumulation66 (lpa66) Arabidopsis thaliana mutant, which displays a high chlorophyll fluorescence phenotype. Its perturbed chlorophyll fluorescence is reflected in reduced levels of PSII proteins. In vivo protein labeling showed that synthesis rates of the PSII reaction center protein D1/D2 were lower, and turnover rates of PSII core proteins higher, than in wild-type counterparts. The assembly of newly synthesized proteins into PSII occurs in the lpa66 mutant, but with reduced efficiency compared with the wild type. LPA66 encodes a chloroplast protein of the pentatricopeptide repeat family. In lpa66 mutants, editing of psbF that converts serine to phenylalanine is specifically impaired. Thus, LPA66 is specifically required for editing the psbF transcripts in Arabidopsis thaliana and the amino acid alternation due to lack of editing strongly affects the efficiency of the assembly of PSII complexes.




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 Plant Cell PhysiolHome page
K. Yura, S. Sulaiman, Y. Hatta, M. Shionyu, and M. Go
RESOPS: A Database for Analyzing the Correspondence of RNA Editing Sites to Protein Three-Dimensional Structures
Plant Cell Physiol., November 1, 2009; 50(11): 1865 - 1873.
[Abstract] [Full Text] [PDF]


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