RNA Ribozyme which cleaves substrate RNA without formation of a convalent bond

作者: Arthur J. Zaug , Thomas R. Cech , Michael D. Been

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摘要: RNA enzymes or ribozymes can act as endoribonucleases, catalyzing the cleavage of molecules with a sequence specificity greater than that known ribonucleases and approaching DNA restriction endonucleases, thus serving specific endoribonucleases. An example is shortened form self-splicing ribosomal intervening Tetrahymena (L-19 IVS RNA). Site-specific mutagenesis enzyme active site L-19 alters substrate in predictable manner, allowing set sequence-specific endoribonucleases to be synthesized. Varying conditions allow ribozyme polymerase (nucleotidyltransferase), dephosphorylase (acid phosphatase phosphotransferase) endoribonuclease.

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