海洋科学2016，Vol.40Issue(7)：1-7,7.DOI:10.11759/hykx20151103001
Magnetospira sp. QH-2 MamK蛋白的结构和系统进化分析
Insight into the structure and evolution of the actin-like pro-tein MamK in Magnetospira sp. QH-2
摘要
Abstract
Magnetospira sp. QH-2 is a marine magnetotactic spirillum, isolated from the intertidal zone of the Yel-low Sea, China. The trait that its magnetosome chains display a relatively large size distribution is predicted to be related to the function of the mamK-encoded protein, namely, MamK. We find that mamK gene codes for 1086bp and MamK, which belong to the NBD_sugar-kinase_HSP70_actin superfamily, are composed of 361 amino acids and do not contain any trans-membrane domain. Based on the differences of the phylogenetic trees, we determine that the acquisition of magnetosome island and bacteria evolution are possibly two independent processes. While the morphology feature of magnetotactic spirillum both in fresh water and marine is similar, its phylogenetic status is different to some extent, which may indicate its adaptive evolutions.关键词
MamK/系统进化/16S rRNA基因/磁小体岛/结构Key words
MamK/phylogenesis/16S rRNA gene/Magnetosome Island/structure分类
生物科学引用本文复制引用
滕兆洁,肖天,张文燕,刘佳,董逸,陈一然,潘红苗,杜海舰,王明玲,徐丛..Magnetospira sp. QH-2 MamK蛋白的结构和系统进化分析[J].海洋科学,2016,40(7):1-7,7.基金项目
国家自然科学基金(41206150,41276170,41330962)@@@@National Natural Science Foundation of China, No.41206150,41276170,41330962 （41206150,41276170,41330962）
