UTILIZATION OF COFACTORS EXPANDS METABOLISM IN A NEW RNA WORLD

被引:14
作者
CONNELL, GJ
CHRISTIAN, EL
机构
[1] The Department of Molecular, Cellular, and Devlopmental Biology, University of Colorado at Boulder
来源
ORIGINS OF LIFE AND EVOLUTION OF THE BIOSPHERE | 1993年 / 23卷 / 5-6期
关键词
D O I
10.1007/BF01582079
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
RNA has been hypothesized to have preceded proteins as the major catalysts of the biosphere, yet there are only a very limited number of chemical reactions that are known to be catalyzed by modern RNA. Cofactors are used by the majority of protein enzymes to supply additional functional groups to the active site. RNA should also be able to utilize some of these same cofactors to extend its own catalytic potential. We describe here how it could be possible to use selection - amplification from a population of random RNA to obtain a coenzyme A mediated RNA transacylase. Exploitation of some of the sulphur chemistry mediated by coenzyme A could have significantly expanded a prebiotic RNA directed metabolism.
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页码:291 / 297
页数:7
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