Linked Life Data

12490161

Source:http://linkedlifedata.com/resource/pubmed/id/12490161

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-3
pubmed:dateCreated
2002-12-19
pubmed:abstractText
A fundamental question of mRNA metabolism concerns the spatial organization of the steps involved in generating mature transcripts and their relationship to SC-35 domains, nuclear compartments enriched in mRNA metabolic factors and poly A+ RNA. Because poly A+ RNA in SC-35 domains remains after transcription inhibition, a prevailing view has been that most or all SC-35 domains do not contain protein-encoding mRNAs but stable RNAs with nuclear functions and thus that these compartments do not have direct roles in mRNA synthesis or transport. However, the transcription, splicing, and transport of transcripts from a specific gene have been shown to occur in association with two of these 15-30 nuclear compartments. Here we show that virtually all SC-35 domains can contain specific mRNAs and that these persist in SC-35 domains after treatment with three different transcription-inhibitory drugs. This suggests perturbation of an mRNA transport step that normally occurs in SC-35 domains and is post-transcriptional but still dependent on ongoing transcription. Finally, even after several hours of transcription arrest, these transcripts do not disperse from SC-35 domains, indicating that they are structurally constrained within them. Our findings importantly suggest a spatially direct role for all SC-35 domains in the coupled steps of mRNA metabolism and transport.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
1047-8477
pubmed:author
pubmed:issnType
Print
pubmed:volume
140
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
131-9
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:articleTitle
Evidence that all SC-35 domains contain mRNAs and that transcripts can be structurally constrained within these domains.
pubmed:affiliation
Department of Cell Biology, University of Massachusetts Medical School, 55 Lake Avenue North (S3-138), Worcester, MA 01655-0002, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.