共 24 条
Mutuallv exclusive splicing of the insect Dscam Pre-mRNA directed by competing intronic RNA secondary structures
被引:193
作者:

Graveley, BR
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机构:
Univ Connecticut, Ctr Hlth, Dept Genet & Dev Biol, Farmington, CT 06030 USA Univ Connecticut, Ctr Hlth, Dept Genet & Dev Biol, Farmington, CT 06030 USA
机构:
[1] Univ Connecticut, Ctr Hlth, Dept Genet & Dev Biol, Farmington, CT 06030 USA
来源:
关键词:
D O I:
10.1016/j.cell.2005.07.028
中图分类号:
Q5 [生物化学];
Q7 [分子生物学];
学科分类号:
071010 ;
081704 ;
摘要:
Drosophila Dscam encodes 38,016 distinct axon guidance receptors through the mutually exclusive alternative splicing of 95 variable exons. Importantly, known mechanisms that ensure the mutually exclusive splicing of pairs of exons cannot explain this phenomenon in Dscam. I have identified two classes of conserved elements in the Dscam exon 6 cluster, which contains 48 alternative exons-the docking site, located in the intron downstream of constitutive exon 5, and the selector sequences, which are located upstream of each exon 6 variant. Strikingly, each selector sequence is complementary to a portion of the docking site, and this pairing juxtaposes one, and only one, alternative exon to the upstream constitutive exon. The mutually exclusive nature of the docking site:selector sequence interactions suggests that the formation of these competing RNA structures is a central component of the mechanism guaranteeing that only one exon 6 variant is included in each Dscam mRNA.
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页码:65 / 73
页数:9
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