SNAP output for PDB entry 4u8t [SNAP web server]

PDB-id

4u8t; SNAP-derived features in text and JSON formats; DNAproDB

Class

RNA binding protein-RNA

Method

X-ray (2.7 Å)

Summary

Crystal structure of yth domain of zygosaccharomyces rouxii mrb1 protein in complex with n6-methyladenosine RNA

Reference

Luo S, Tong L (2014): "Molecular basis for the recognition of methylated adenines in RNA by the eukaryotic YTH domain." Proc.Natl.Acad.Sci.USA, 111, 13834-13839. doi: 10.1073/pnas.1412742111.

Abstract

Methylation of the N6 position of selected internal adenines (m(6)A) in mRNAs and noncoding RNAs is widespread in eukaryotes, and the YTH domain in a collection of proteins recognizes this modification. We report the crystal structure of the splicing factor YT521-B homology (YTH) domain of Zygosaccharomyces rouxii MRB1 in complex with a heptaribonucleotide with an m(6)A residue in the center. The m(6)A modification is recognized by an aromatic cage, being sandwiched between a Trp and Tyr residue and with the methyl group pointed toward another Trp residue. Mutations of YTH domain residues in the RNA binding site can abolish the formation of the complex, confirming the structural observations. These residues are conserved in the human YTH proteins that also bind m(6)A RNA, suggesting a conserved mode of recognition. Overall, our structural and biochemical studies have defined the molecular basis for how the YTH domain functions as a reader of methylated adenines.