YB-1 binds to CAUC motifs and stimulates exon inclusion by enhancing the recruitment of U2AF to weak polypyrimidine tracts.
YB-1 binds to CAUC motifs and stimulates exon inclusion by enhancing the recruitment of U2AF to weak polypyrimidine tracts.
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YB-1 与 CAUC 基序结合,并通过增强 U2AF 向弱聚嘧啶束的募集来刺激外显子包含
DOI:
10.1093/nar/gks579
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发表时间:
2012-09-01
影响因子:
14.9
通讯作者:
Hui J
中科院分区:
文献类型:
--
作者:
Wei WJ;Mu SR;Heiner M;Fu X;Cao LJ;Gong XF;Bindereif A;Hui J
The human Y box-binding protein-1 (YB-1) is a deoxyribonucleic acid (DNA)/ribonucleic acid (RNA)-binding protein with pleiotropic functions. Besides its roles in the regulation of transcription and translation, several recent studies indicate that YB-1 is a spliceosome-associated protein and is involved in alternative splicing, but the underlying mechanism has remained elusive. Here, we define both CAUC and CACC as high-affinity binding motifs for YB-1 by systematic evolution of ligands by exponential enrichment (SELEX) and demonstrate that these newly defined motifs function as splicing enhancers. Interestingly, on the endogenous CD44 gene, YB-1 appears to mediate a network interaction to activate exon v5 inclusion via multiple CAUC motifs in both the alternative exon and its upstream polypyrimidine tract. We provide evidence that YB-1 activates splicing by facilitating the recruitment of U2AF65 to weak polypyrimidine tracts through direct protein–protein interactions. Together, these findings suggest a vital role of YB-1 in activating a subset of weak 3′ splice sites in mammalian cells.
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影响因子:
64.5
作者:
Cooper TA;Wan L;Dreyfuss G
通讯作者:
Dreyfuss G
影响因子:
64.8
作者:
通讯作者:
--
影响因子:
5.3
作者:
Deckert, Jochen;Hartmuth, Maus;Luehrmann, Reinhard
通讯作者:
Luehrmann, Reinhard
影响因子:
4.5
作者:
Amir-Ahmady, B;Boutz, PL;Black, DL
通讯作者:
Black, DL
影响因子:
4.5
作者:
Hui, JY;Reither, G;Bindereif, A
通讯作者:
Bindereif, A