title: Proteomic analysis of membrane proteins from a radioresistant and moderate thermophilic bacterium Deinococcus geothermalis.
abstract: Deinococcus geothermalis is a radioresistant and moderate thermophilic bacterium. Little was known about the membrane or membrane associated proteins of this bacterium. This study established the membrane subproteome profile of D. geothermalis, using 1-D PAGE and LC-MS/MS analysis following Triton X-114 detergent extraction. A total of 552 proteins from the membrane preparations were identified from two independent trials. In the total identified proteins, 117 were membrane subproteomic proteins, and 89 of them were described for the first time in D. geothermalis including fimbrial pilin (Dgeo_2038), cytochrome bd ubiquinol oxidase (Dgeo_2705) and multi-sensor (Dgeo_2096). The major membrane subproteomic proteins were distributed into 18 functional groups including nutrient transport and metabolism, energy production and conversion, cell wall/membrane biogenesis and a poorly characterized subclass. The identifications of Deinococcus-specific proteins, such as cell surface receptor IPT/TIG (Dgeo_1119) and four hypothetical proteins, demonstrated the special protein composition and functions in the cell membrane of Deinococcus. The results provide a basis for quantitative proteomic analysis, which will facilitate the understanding of the adaptation of this organism to different environmental stresses and the development of strategies for bioremediation of environmental waste.
authors: Key Laboratory for Nuclear-Agricultural Sciences of Chinese Ministry of Agriculture and Zhejiang Province, Institute of Nuclear-Agricultural Sciences, Zhejiang University, 310029 Hangzhou, China. yjhua@zju.edu.cn.
authors: Bing
authors: B
authors: Tian
authors: Hu
authors: H
authors: Wang
authors: Xiaoqiong
authors: X
authors: Ma
authors: Yaping
authors: Y
authors: Hu
authors: Zongtao
authors: Z
authors: Sun
authors: Shaochuan
authors: S
authors: Shen
authors: Fei
authors: F
authors: Wang
authors: Yuejin
authors: Y
authors: Hua
mesh_terms: D002853:Chromatography, Liquid; D034301:Deinococcus / Q000378:metabolism* / Q000528:radiation effects; D004591:Electrophoresis, Polyacrylamide Gel; D008565:Membrane Proteins / Q000378:metabolism*; D040901:Proteomics; D053719:Tandem Mass Spectrometry
chemical_list: D008565:Membrane Proteins