Quantitative Understanding of SHAPE Mechanism from RNA Structure and Dynamics Analysis

Travis Hurst, Xiaojun Xu, Peinan Zhao, Shi Jie Chen

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

The selective 2′-hydroxyl acylation analyzed by primer extension (SHAPE) method probes RNA local structural and dynamic information at single nucleotide resolution. To gain quantitative insights into the relationship between nucleotide flexibility, RNA 3D structure, and SHAPE reactivity, we develop a 3D Structure-SHAPE Relationship model (3DSSR) to rebuild SHAPE profiles from 3D structures. The model starts from RNA structures and combines nucleotide interaction strength and conformational propensity, ligand (SHAPE reagent) accessibility, and base-pairing pattern through a composite function to quantify the correlation between SHAPE reactivity and nucleotide conformational stability. The 3DSSR model shows the relationship between SHAPE reactivity and RNA structure and energetics. Comparisons between the 3DSSR-predicted SHAPE profile and the experimental SHAPE data show correlation, suggesting that the extracted analytical function may have captured the key factors that determine the SHAPE reactivity profile. Furthermore, the theory offers an effective method to sieve RNA 3D models and exclude models that are incompatible with experimental SHAPE data.

Original languageEnglish
Pages (from-to)4771-4783
Number of pages13
JournalJournal of Physical Chemistry B
Volume122
Issue number18
DOIs
StatePublished - May 10 2018
Externally publishedYes

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