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Imaging bacteriorhodopsin-like molecules of claret-membranes from Tibet halobacteria xz515 by atomic force microscope 被引量:2
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作者 TANG Lin SUN Qing’an +7 位作者 LI Qingguo HUANG Yibo WEI Qingqing ZHANG Yi HU Jun ZHANG Zhihong LI Minqian YANG Fujia 《Chinese Science Bulletin》 SCIE EI CAS 2001年第22期1897-1900,共4页
Halobacteria H.sp.xz 515 was isolated from a salt lake in Tibet. Although proton release-and-uptake across claret membrane is in reverse order compared to bacteri-orhodopsin in purple membrane from Halobacterium Sali-... Halobacteria H.sp.xz 515 was isolated from a salt lake in Tibet. Although proton release-and-uptake across claret membrane is in reverse order compared to bacteri-orhodopsin in purple membrane from Halobacterium Sali-narum, and its efficiency of proton pump is much lower, AFM image shows that the molecules are still arranged in a two-dimensional hexagonal lattice of trimers. Primary structure of C- to G-helix of the archaerhodopsin shows that it has only 56% homology with bacteriorhodopsin. But the interactive amino acid residues at the interface between B-and D-helixes are conserved. These amino acid residues are believed to play a significant role in the stability of protein oligomers. 展开更多
关键词 atomic force MICROSCOPE archaerhodopsin bacteri- orhodopsin HEXAGONAL lattice halobacteria.
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