Chemical Shift Prediction of RNA Imino Groups: Application Toward Characterizing RNA Excited States

Overview

Journal Nat Commun

Specialty Biology

Date 2021 Mar 12

PMID 33707433

Citations 15

Authors

Yanjiao Wang

Ge Han

Xiuying Jiang

Tairan Yuwen

Yi Xue

Affiliations

Soon will be listed here.

Abstract

NH groups in proteins or nucleic acids are the most challenging target for chemical shift prediction. Here we show that the RNA base pair triplet motif dictates imino chemical shifts in its central base pair. A lookup table is established that links each type of base pair triplet to experimental chemical shifts of the central base pair, and can be used to predict imino chemical shifts of RNAs to remarkable accuracy. Strikingly, the semiempirical method can well interpret the variations of chemical shifts for different base pair triplets, and is even applicable to non-canonical motifs. This finding opens an avenue for predicting chemical shifts of more complicated RNA motifs. Furthermore, we combine the imino chemical shift prediction with NMR relaxation dispersion experiments targeting both N and H of the imino group, and verify a previously characterized excited state of P5abc subdomain including an earlier speculated non-native G•G mismatch.

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