| Functional analysis of an intron 3' splice site in Caenorhabditis elegans. | |
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MedLine Citation:
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PMID: 8634918 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Caenorhabditis elegans introns typically lack both branch point and polypyrimidine tract consensus sequences utilized in other organisms for intron recognition. However, most introns have an unusually long, highly conserved consensus, UUUCAG/R, at the 3' splice site. This site can be recognized even when the -1G is changed to A. To determine how the 3' splice site is defined, we tested mutations in the sequence UUUCAA/A at the 3' splice site of the first intron of a test gene in vivo. Replacement of individual U's with A's or C's compromised splicing. When the sequence UUUCAA/AAG was tested, splicing occurred following both the -1A and the +3G, indicating that both UUUC and the AG contain 3' splice site information. When the sequence UUUCAA/AAA was tested, all splicing occurred following the -1A, suggesting that the UUUC contains sufficient information in the absence of an AG to specify the location of the splice site. In support of this idea, when point mutations were introduced into the UUUC, unspliced RNAs accumulated. Surprisingly, RNAs containing the mutant intron often contained the second, nonmutated intron as well, suggesting that interference with splicing of one intron can interfere with splicing of a second intron in the same pre-mRNA. The majority of these unspliced RNAs were degraded by the system responsible for degradation of transcripts containing nonsense mutations (smg), even though the intron contained no nonsense codon. |
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Authors:
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H Zhang; T Blumenthal |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: RNA (New York, N.Y.) Volume: 2 ISSN: 1355-8382 ISO Abbreviation: RNA Publication Date: 1996 Apr |
Date Detail:
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Created Date: 1996-07-09 Completed Date: 1996-07-09 Revised Date: 2008-11-20 |
Medline Journal Info:
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Nlm Unique ID: 9509184 Medline TA: RNA Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 380-8 Citation Subset: IM |
Affiliation:
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Department of Biology, Indiana University, Bloomington 47405, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Base Sequence Caenorhabditis elegans / genetics* Introns* Molecular Sequence Data Mutation RNA Precursors / genetics RNA Splicing* RNA, Messenger / genetics |
| Grant Support | |
ID/Acronym/Agency:
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GM42432/GM/NIGMS NIH HHS |
| Chemical | |
Reg. No./Substance:
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0/RNA Precursors; 0/RNA, Messenger |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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