Download MendeleyMolecular basis for the specific and multivariant recognitions of RNA substrates by human hnRNP A2/B1.
Wu, B.X., Su, S.C., Patil, D.P., Liu, H., Gan, J.H., Jaffrey, S.R., Ma, J.B.(2018) Nat Commun 9: 420-420
- PubMed: 29379020
- DOI: https://doi.org/10.1038/s41467-017-02770-z
- Primary Citation of Related Structures:
5HO4, 5WWE, 5WWF, 5WWG - PubMed Abstract:
Human hnRNP A2/B1 is an RNA-binding protein that plays important roles in many biological processes, including maturation, transport, and metabolism of mRNA, and gene regulation of long noncoding RNAs. hnRNP A2/B1 was reported to control the microRNAs sorting to exosomes and promote primary microRNA processing as a potential m 6 A "reader." hnRNP A2/B1 contains two RNA recognition motifs that provide sequence-specific recognition of RNA substrates. Here, we determine crystal structures of tandem RRM domains of hnRNP A2/B1 in complex with various RNA substrates, elucidating specific recognitions of AGG and UAG motifs by RRM1 and RRM2 domains, respectively. Further structural and biochemical results demonstrate multivariant binding modes for sequence-diversified RNA substrates, supporting a RNA matchmaker mechanism in hnRNP A2/B1 function. Moreover, our studies in combination with bioinformatic analysis suggest that hnRNP A2/B1 may mediate effects of m 6 A through a "m 6 A switch" mechanism, instead of acting as a direct "reader" of m 6 A modification.
Organizational Affiliation:
State Key Laboratory of Genetic Engineering, Collaborative Innovation Centre of Genetics and Development, Department of Biochemistry, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, 200438, China.
