کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7693978 1496470 2017 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structure-based mechanistic insights into catalysis by small self-cleaving ribozymes
ترجمه فارسی عنوان
بر اساس ساختار مبتنی بر مکانیسم بینش به کاتالیز با ریبوزم کوچک خود شکاف
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
چکیده انگلیسی
Small self-cleaving ribozymes are widely distributed in nature and are essential for rolling-circle-based replication of satellite and pathogenic RNAs. Earlier structure-function studies on the hammerhead, hairpin, glmS, hepatitis delta virus and Varkud satellite ribozymes have provided insights into their overall architecture, their catalytic active site organization, and the role of nearby nucleobases and hydrated divalent cations in facilitating general acid-base and electrostatic-mediated catalysis. This review focuses on recent structure-function research on active site alignments and catalytic mechanisms of the Rzb hammerhead ribozyme, as well as newly-identified pistol, twister and twister-sister ribozymes. In contrast to an agreed upon mechanistic understanding of self-cleavage by Rzb hammerhead and pistol ribozymes, there exists a divergence of views as to the cleavage site alignments and catalytic mechanisms adopted by twister and twister-sister ribozymes. One approach to resolving this conundrum would be to extend the structural studies from currently available pre-catalytic conformations to their transition state mimic vanadate counterparts for both ribozymes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Current Opinion in Chemical Biology - Volume 41, December 2017, Pages 71-83
نویسندگان
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