相关实验视频

Updated: Jun 7, 2025

Residue-Specific Exchange of Proline by Proline Analogs in Fluorescent Proteins: How "Molecular Surgery" of the Backbone Affects Folding and Stability
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Residue-Specific Exchange of Proline by Proline Analogs in Fluorescent Proteins: How "Molecular Surgery" of the Backbone Affects Folding and Stability

Published on: February 3, 2022

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有效地抑制过早终结的代与氨酸通过工程化基因化学pyrrolysinetRNAs的有效抑制

Aya Awawdeh1, Alejandro Tapia2,3, Sarah A Alshawi4

  • 1Department of Molecular Biology and Biophysics, University of Connecticut School of Medicine, 263 Farmington Avenue, Farmington, CT 06030, USA.

Nucleic acids research
|November 18, 2024
PubMed
概括

研究人员使用pyrrolysine tRNA支架开发了一种新的抑制器转移RNAs (sup-tRNAs) 类. 这些新型的sup-tRNAs有效地从具有过早终止编码子的基因中恢复蛋白质合成,为遗传疾病提供治疗潜力.

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Base complementarity between the three base pairs of mRNA codon and the tRNA anticodon is not a failsafe mechanism. Inaccuracies can range from a single mismatch to no correct base pairing at all. The free energy difference between the correct and nearly correct base pairs can be as small as 3 kcal/ mol. With complementarity being the only proofreading step, the estimated error frequency would be one wrong amino acid in every 100 amino acids incorporated. However, error frequencies observed in...
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One of the unique features of tRNA is the presence of modified bases. In some tRNAs, modified bases account for nearly 20% of the total bases in the molecule. Altogether, these unusual bases protect the tRNA from enzymatic degradation by RNases.
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