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Imaginary Ribozymes.
ACS Chemical Biology ( IF 3.5 ) Pub Date : 2020-07-20 , DOI: 10.1021/acschembio.0c00214
Ronald R Breaker 1
Affiliation  

Biocatalysis is dominated by protein enzymes, and only a few classes of ribozymes are known to contribute to the task of promoting biochemical transformations. The RNA World theory encompasses the notion that earlier forms of life made use of a much greater diversity of ribozymes and other functional RNAs to guide complex metabolic states long before proteins had emerged in evolution. In recent years, the discoveries of various classes of ribozymes, riboswitches, and other noncoding RNAs in bacteria have provided additional support for the hypothesis that RNA molecules indeed have the catalytic competence to promote diverse chemical reactions without the aid of protein enzymes. Herein, some of the most striking observations made from examinations of natural riboswitches that bind small ligands are highlighted and used as a basis to imagine the characteristics and functions of long-extinct ribozymes from the RNA World.

中文翻译:

 想象中的核酶。


生物催化以蛋白质酶为主,已知只有少数几类核酶有助于促进生化转化。 RNA世界理论包含这样一种观念,即早在蛋白质在进化中出现之前,早期的生命形式就利用了更加多样化的核酶和其他功能性RNA来指导复杂的代谢状态。近年来,细菌中各类核酶、核糖开关和其他非编码 RNA 的发现为以下假设提供了额外的支持:RNA 分子确实具有催化能力,无需蛋白酶的帮助即可促进多种化学反应。在此,重点介绍了对结合小配体的天然核糖开关进行检查时得出的一些最引人注目的观察结果,并将其用作想象 RNA 世界中早已灭绝的核酶的特征和功能的基础。
更新日期:2020-08-21
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