Structural basis of branch site recognition by the human spliceosome.
Structural basis of branch site recognition by the human spliceosome.
复制标题
人类剪接体识别分支位点的结构基础。
DOI:
10.1126/science.abm4245
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发表时间:
2022-01-07
期刊:
影响因子:
--
通讯作者:
Galej WP
中科院分区:
文献类型:
--
作者:
Tholen J;Razew M;Weis F;Galej WP
Recognition of the intron branch site (BS) by the U2 snRNP is a critical event during spliceosome assembly. In mammals, BS sequences are poorly conserved and unambiguous intron recognition cannot be achieved solely via a base-pairing mechanism. We isolated human 17S U2 snRNP and reconstituted in vitro its ATP-dependent remodelling and binding to the pre-mRNA substrate. We determined a series of high-resolution (2.0-2.2 Å) structures providing snapshots of the BS selection process. The substrate-bound U2 snRNP shows that SF3B6 stabilises the BS:U2 snRNA duplex, which could aid binding of introns with poor sequence complementarity. ATP-dependent remodelling uncoupled from substrate binding captures U2 snRNA in a conformation that competes with BS recognition, providing a selection mechanism based on branch helix stability.
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影响因子:
14.8
作者:
Koch B;Nijmeijer B;Kueblbeck M;Cai Y;Walther N;Ellenberg J
通讯作者:
Ellenberg J
影响因子:
14.9
作者:
Carrocci TJ;Zoerner DM;Paulson JC;Hoskins AA
通讯作者:
Hoskins AA
影响因子:
48
作者:
Kastner, Berthold;Fischer, Niels;Stark, Holger
通讯作者:
Stark, Holger
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
影响因子:
4.8
作者:
Loerch, Sarah;Leach, Justin R.;Kielkopf, Clara L.
通讯作者:
Kielkopf, Clara L.