EVIDENCE THAT EUKARYOTES AND EOCYTE PROKARYOTES ARE IMMEDIATE RELATIVES

被引：277

作者：

RIVERA, MC ^{[1
]}

LAKE, JA ^{[1
]}

机构：

[1] UNIV CALIF LOS ANGELES,DEPT BIOL,LOS ANGELES,CA 90024

来源：

SCIENCE | 1992年 / 257卷 / 5066期

关键词：

D O I：

10.1126/science.1621096

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The phylogenetic origin of eukaryotes has been unclear because eukaryotic nuclear genes have diverged substantially from prokaryotic ones. The genes coding for elongation factor EF-1-alpha were compared among various organisms. The EF-1-alpha sequences of eukaryotes contained an 11-amino acid segment that was also found in eocytes (extremely thermophilic, sulfur-metabolizing bacteria) but that was absent in all other bacteria. The related (paralogous) genes encoding elongation factor EF-2 and initiation factor IF-2 also lacked the 11-amino acid insert. These data imply that the eocytes are the closest surviving relatives (sister taxon) of the eukaryotes.

引用

页码：74 / 76

页数：3

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