Premium
Low unsaturation level of thylakoid membrane lipids limits turnover of the D1 protein of photosystem II at high irradiance
Author(s) -
Eira Kanervo,
EvaMari Aro,
Norio Murata
Publication year - 1995
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(95)00404-w
Subject(s) - thylakoid , photoinhibition , photosystem ii , photosystem , biochemistry , degree of unsaturation , photosystem i , chemistry , membrane , photosynthesis , synechocystis , photosynthetic reaction centre , membrane protein , biophysics , mutant , chloroplast , biology , chromatography , gene
Turnover of the D1 protein of photosystem II (PSII) was studied in mutants of Synechocystis sp. PCC 6803 defective in the desaturation of thylakoid membrane lipids. The lack of polyunsaturated fatty acids from membranes made PSII extremely susceptible to photoinhibition and caused a significant reduction in the D1 protein content of the thylakoid membranes at high irradiances. These results may be attributed to an impaired function in the protein synthesis machinery, most probably at the translational or posttranslational level.