A PORIN-TYPE PROTEIN IS THE MAIN CONSTITUENT OF THE CELL-ENVELOPE OF THE ANCESTRAL EUBACTERIUM THERMOTOGA-MARITIMA

被引：55

作者：

RACHEL, R

ENGEL, AM

HUBER, R

STETTER, KO

BAUMEISTER, W

机构：

[1] MAX PLANCK INST BIOCHEM,W-8033 MARTINSRIED,GERMANY

[2] UNIV REGENSBURG,INST BIOCHEM GENET & MIKROBIOL,W-8400 REGENSBURG,GERMANY

来源：

FEBS LETTERS | 1990年 / 262卷 / 01期

关键词：

(Thermotoga maritima); Bacterial outer membrane; Electron microscopy; Evolution; Porin; Two-dimensional protein crystal;

D O I：

10.1016/0014-5793(90)80155-C

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Thermotoga maritima is an extremely thermophilic eubacterium and represents the deepest known branch and the most slowly evolving line within this kingdom. This bacterium possesses a sheath-like envelope which forms characteristic balloons (the 'toga') around the cell poles. We have shown by electron microscopy in conjunction with image processing and by biochemical analyses that this sheath is essentially an outer membrane. Its predominant 42 kDa protein, which is regularly arrayed in vivo, has all the characteristics of the trimeric porins known from the phylogenetically very distant proteobacteria. This was an unexpected finding, which has some interesting evolutionary implications. © 1990.

引用

页码：64 / 68

页数：5

共 27 条

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