title: Sll1466, a glycosyl transferase homolog involved in global cellular regulation and high-light tolerance of Synechocystis PCC6803.
abstract: In Synechocystis sp. PCC 6803, the loop domain (aa 1-70) of the phycobilisome core-membrane linker, L(CM), was found to interact with the glycosyl transferase homolog, Sll1466. Growth of a Sll1466 knock-out mutant was slightly faster in low light, but strongly inhibited in high light; the phenotype is discussed in relation to the regulation of light energy transfer to photosystem II. At the molecular level, the mutant shows the following changes compared to the wild type: (1) a smaller size and higher mobility of phycobilisomes on the thylakoid membrane, and (2) a changed lipid composition of the thylakoid membrane, especially decreased amounts of digalactosyl diacylglycerol. These results indicate a profound regulatory role for Sll1466 in regulating photosynthetic energy transfer.
authors.affiliation: College of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, PR China. wx19830411@yahoo.cn
authors.forename: Xing
authors.initials: X
authors.lastname: Wang
authors.forename: Liang-Liang
authors.initials: LL
authors.lastname: Dong
authors.forename: Chun-Xi
authors.initials: CX
authors.lastname: Zhang
authors.forename: Kuan-Zheng
authors.initials: KZ
authors.lastname: Zhu
authors.forename: Jing-Quan
authors.initials: JQ
authors.lastname: Zhao
authors.forename: Kai-Hong
authors.initials: KH
authors.lastname: Zhao
authors.forename: Ming
authors.initials: M
authors.lastname: Zhou
mesh_terms: D016695:Glycosyltransferases / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D008027:Light; D009154:Mutation; D010788:Photosynthesis; D011836:Radiation Tolerance; D046939:Synechocystis / Q000201:enzymology* / Q000235:genetics / Q000528:radiation effects*
chemical_list: D016695:Glycosyltransferases