Structure-function studies of FMRP RGG peptide recognition of an RNA duplex-quadruplex junction.
Structure-function studies of FMRP RGG peptide recognition of an RNA duplex-quadruplex junction.
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RNA 双链体-四链体连接的 FMRP RGG 肽识别的结构功能研究。
DOI:
10.1038/nsmb.2064
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发表时间:
2011-06-05
影响因子:
16.8
通讯作者:
Patel, Dinshaw J.
中科院分区:
文献类型:
--
作者:
Anh Tuan Phan;Kuryavyi, Vitaly;Darnell, Jennifer C.;Serganov, Alexander;Majumdar, Ananya;Ilin, Serge;Raslin, Tanya;Polonskaia, Anna;Chen, Cynthia;Clain, David;Darnell, Robert B.;Patel, Dinshaw J.
We have determined the solution structure of the complex between an arginine-glycine-rich RGG peptide from the fragile X mental retardation protein (FMRP) and an in vitro-selected guanine-rich sc1 RNA. The bound RNA forms a novel G-quadruplex separated from the flanking duplex stem by a mixed junctional tetrad. The RGG peptide is positioned along the major groove of the RNA duplex, with the G-quadruplex forcing a sharp turn of R10GGGGR15 at the duplex-quadruplex junction. Arginines R10 and R15 form cross-strand specificity-determining intermolecular hydrogen-bonds with the major-groove edges of guanines of adjacent Watson-Crick G•C pairs. Filter binding assays on RNA and peptide mutations identify and validate contributions of peptide-RNA intermolecular contacts and shape complementarity to molecular recognition. These findings on FMRP RGG domain recognition by a combination of G-quadruplex and surrounding RNA sequences have implications for recognition of other genomic G-rich RNAs.
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