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10.1016/j.tibs.2015.09.001

http://scihub22266oqcxt.onion/10.1016/j.tibs.2015.09.001
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C4630146!4630146!26481500
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suck abstract from ncbi

pmid26481500      Trends+Biochem+Sci 2015 ; 40 (11): 648-61
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  • Chemistry and biology of self-cleaving ribozymes #MMPMID26481500
  • Jimenez RM; Polanco JA; Lupták A
  • Trends Biochem Sci 2015[Nov]; 40 (11): 648-61 PMID26481500show ga
  • Self-cleaving ribozymes were discovered thirty years ago, but their biological distribution and catalytic mechanisms are only beginning to be defined. Each ribozyme family is defined by a distinct structure with unique active sites accelerating the same transesterification reaction across the families. Biochemical studies show that general acid-base catalysis is the most common mechanism of self-cleavage, but metal ions and metabolites can be employed as cofactors. Ribozymes have been discovered in highly diverse genomic contexts throughout nature, from viroids to vertebrates. Their biological roles include self-scission during rolling-circle replication of RNA genomes, co-transcriptional processing of retrotransposons, and metabolite-dependent gene expression regulation in bacteria. Other examples, including highly conserved mammalian ribozymes, suggest that many new biological roles are yet to be discovered.
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