کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5589768 | 1569817 | 2017 | 32 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Activation of the intronic cryptic 5â² splice site depends on its distance to the upstream cassette exon
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
ژنتیک
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چکیده انگلیسی
Splice site selection is a key step that determines the mRNA isoforms generated from a single transcript. The large diversity in splice site sequences emphasizes the plasticity of splice site recognition and selection. In this report, a cell-based reporter system using a SMN1/2 cassette exon was applied to study the roles governing the activation of a cryptic 5â²SS from the intron 4 of the CT/CGRP gene. We found that the cryptic site was activated when placed within 124Â nt downstream the cassette exon, and the level of activation was negatively correlated with its distance from the exon. In addition, activation was not affected by PTB but was eliminated by an insertion extending the exon length. Activated cryptic 5â²SSs in intron or exon could override the original alternative 5â²SS, obeying the U1 base-pairing rule. These results suggest that the exon length itself could represent a factor in determining the splice site selection.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Gene - Volume 619, 1 July 2017, Pages 30-36
Journal: Gene - Volume 619, 1 July 2017, Pages 30-36
نویسندگان
Wei Liu, Xia Li, Shengjie Liao, Kefeng Dou, Yi Zhang,