Crystal structure of the β-finger domain of Prp8 reveals analogy to ribosomal proteins
Crystal structure of the β-finger domain of Prp8 reveals analogy to ribosomal proteins
复制标题
Prp8 β-指结构域的晶体结构揭示了与核糖体蛋白的相似性
DOI:
10.1073/pnas.0805960105
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发表时间:
2008
期刊:
影响因子:
--
通讯作者:
R. Zhao
中科院分区:
文献类型:
--
作者:
Kui Yang;Lingdi Zhang;Tao Xu;A. Héroux;R. Zhao
Prp8 stands out among hundreds of splicing factors as a key regulator of spliceosome activation and a potential cofactor of the splicing reaction. We present here the crystal structure of a 274-residue domain (residues 1,822–2,095) near the C terminus of Saccharomyces cerevisiae Prp8. The most striking feature of this domain is a β-hairpin finger protruding out of the protein (hence, this domain will be referred to as the β-finger domain), resembling many globular ribosomal proteins with protruding extensions. Mutations throughout the β-finger change the conformational equilibrium between the first and the second catalytic step. Mutations at the base of the β-finger affect U4/U6 unwinding-mediated spliceosome activation. Prp8 may insert its β-finger into the first-step complex (U2/U5/U6/pre-mRNA) or U4/U6.U5 tri-snRNP and stabilize these complexes. Mutations on the β-finger likely alter these interactions, leading to the observed mutant phenotypes. Our results suggest a possible mechanism of how Prp8 regulates spliceosome activation. These results also demonstrate an analogy between a spliceosomal protein and ribosomal proteins that insert extensions into folded rRNAs and stabilize the ribosome.
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影响因子:
3.9
作者:
Brewer,JM;Carreira,LA;Irwin,RM;Elliott,JI
通讯作者:
Elliott,JI
DOI:
10.1017/s1355838299981785
发表时间:
1999
期刊:
RNA (New York, N.Y.)
影响因子:
--
作者:
Reyes,JL;Gustafson,EH;Luo,HR;Moore,MJ;Konarska,MM
通讯作者:
Konarska,MM
影响因子:
56.9
作者:
YANG, W;HENDRICKSON, WA;SATOW, Y
通讯作者:
SATOW, Y
DOI:
--
发表时间:
1995
期刊:
RNA (New York, N.Y.)
影响因子:
--
作者:
Umen,JG;Guthrie,C
通讯作者:
Guthrie,C
影响因子:
4.5
作者:
Lardelli, Rea M.;Thompson, James X.;Stevens, Scott W.
通讯作者:
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