Structural evidence for consecutive Hel308-like modules in the spliceosomal ATPase Brr2.
Structural evidence for consecutive Hel308-like modules in the spliceosomal ATPase Brr2.
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剪接ATPase BRR2中连续的HEL308类模块的结构证据。
DOI:
10.1038/nsmb.1625
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发表时间:
2009-07
影响因子:
16.8
通讯作者:
中科院分区:
文献类型:
--
作者:
Brr2 is a DExD/H-box helicase responsible for U4/U6 unwinding during spliceosomal activation. Brr2 contains two helicase-like domains, each of which is followed by a Sec63 domain with unknown function. We determined the crystal structure of the second Sec63 domain, which unexpectedly resembles domains 4 and 5 of DNA helicase Hel308. This, together with sequence similarities between Brr2’s helicase-like domains and domains 1–3 of Hel308, led us to hypothesize that Brr2 contains two consecutive Hel308-like modules (Hel308-I and II). Our structural model and mutagenesis data suggest that Brr2 shares a similar helicase mechanism with Hel308. We demonstrate that Hel308-II interacts with Prp8 and Snu114 in vitro and in vivo. We further find that the C-terminal region of Prp8 (Prp8-CTR) facilitates the binding of the Brr2/Prp8-CTR complex to U4/U6. Our results have important implications for the mechanism and regulation of Brr2’s activity.
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影响因子:
16.8
作者:
Haecker, Irina;Sander, Bjoern;Luehrmann, Reinhard
通讯作者:
Luehrmann, Reinhard
影响因子:
16.8
作者:
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Hopfner, Karl-Peter
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通讯作者:
Rossi, JJ
影响因子:
14.9
作者:
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通讯作者:
CORPET, F
影响因子:
4.5
作者:
Liu, Sunbin;Rauhut, Reinhard;Luehrmann, Reinhard
通讯作者:
Luehrmann, Reinhard