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Extraordinary rates of transition metal ion-mediated ribozyme catalysis

In pre-steady-state, fast-quench kinetic analysis, the tertiary-stabilized hammerhead ribozyme “RzB” cleaves its substrate RNA with maximal measured k (obs) values of ∼3000 min(−1) in 1 mM Mn(2+) and ∼780 min(−1) in 1 mM Mg(2+) at 37°C (pH 7.4). Apparent pKa for the catalytic general base is ∼7.8–8....

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Autors principals: Roychowdhury-Saha, Manami, Burke, Donald H.
Format: Artigo
Idioma:Inglês
Publicat: Cold Spring Harbor Laboratory Press 2006
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Accés en línia:https://ncbi.nlm.nih.gov/pmc/articles/PMC1581984/
https://ncbi.nlm.nih.gov/pubmed/16912216
https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1261/rna.128906
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