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Selective forces for the origin of spliceosomes
Názov Selective forces for the origin of spliceosomes Aut.údaje Matej Vesteg, Zuzana Šándorová, Juraj Krajčovič Autor Vesteg Matej 1982- (60%)
Spoluautori Šándorová Zuzana (20%)
Krajčovič Juraj (20%)
Zdroj.dok. Journal of Molecular Evolution. Vol. 74, no. 3-4 (2012), pp. 226-231. - New York : Springer, 2012 Kľúč.slová biochémia - biochemistry molekulárna biológia - molekulová biológia - molecular biology evolučná biológia - evolutionary biology Jazyk dok. angličtina Krajina Spojené štáty Systematika 577 Anotácia It has been proposed that eukaryotic spliceosomes evolved from bacterial group II introns via constructive neutral changes. However, a more likely interpretation is that spliceosomes and group II introns share a common undefined RNA ancestor—a proto-spliceosome. Although, the constructive neutral evolution may have probably played some roles in the development of complexity including the evolution of modern spliceosomes, in fact, the origin, losses and the retention of spliceosomes can be explained straight-forwardly mainly by positive and negative selection: (1) proto-spliceosomes evolved in the RNA world as a mechanism to excise functional RNAs from an RNA genome and to join noncoding information (ancestral to exons) possibly designed to be degraded. (2) The complexity of proto-spliceosomes increased with the invention of protein synthesis in the RNP world and theywere adopted for (a) the addition of translation signal to RNAs via trans-splicing, and for (b) the exon-shuffling such as to join together exons coding separate protein domains, to translate themas a single unit and thus to facilitate the molecular interaction of protein domains needed to be assembled to functional catalytic complexes. (3) Finally, the spliceosomes were adopted for cis-splicing of (mainly) non-coding information (contemporary introns) to yield translatable mRNAs. (4) Spliceosome-negative organisms (i.e., prokaryotes) have been selected in the DNA–protein world to save a lot of energy. (5) Spliceosome-positive organisms (i.e., eukaryotes) have been selected, because they have been completely spliceosome-dependent Kategória publikačnej činnosti ADC Číslo archívnej kópie 42335 Kategória ohlasu VOSSEBERG, Julian - SNEL, Berend. Domestication of self-splicing introns during eukaryogenesis : the rise of the complex spliceosomal machinery. In Biology direct. ISSN 1745-6150, 2017, vol. 12, no. 30.
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