Linked Life Data

16723505

Source:http://linkedlifedata.com/resource/pubmed/id/16723505

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2006-8-24
pubmed:abstractText
Spermatogeniccells elaborate a highly specialized differentiation program that is mediated in part by germ cell-enriched transcription factors. This includes a novel member of the sterol response element-binding factor family, SREBF2_v1/SREBP2gc. Somatic SREBFs are predominantly synthesized as precursor proteins and are critical regulators of cholesterol and fatty acid synthesis. In contrast, SREBF2_v1 bypasses the precursor pathway and has been directly implicated in spermatogenic cell-specific gene expression. During spermatogenesis, SREBF2 precursor transcripts predominate in premeiotic stages, while SREBF2_v1 is highly upregulated specifically in pachytene spermatocytes and round spermatids. In the present study, we demonstrate thatSrebf2_v1mRNAs are present in the testis of several mammalian species, including humans. The basis for the stage-dependent transition in SREBF2 isoforms was also investigated. A 3' rapid amplification of cDNA ends (RACE)-PCR analysis of the rat and human revealed thatSrebf2_v1transcripts are generated by alternative pre-mRNA cleavage/polyadenylation. This involves the use of an intronic, A(A/U)UAAA-independent poly(A) signal within intron 7 of theSrebf2gene. Developmentally regulated competition between germ cell factors that control RNA splicing and pre-mRNA cleavage/polyadenylation may underlie this process. These results define an important role for alternative polyadenylation in male germ cell gene expression and development by controlling a stage-dependent switch in transcription factor structure and function during spermatogenesis. TheSrebf2gene thus provides a useful model to explore the role of alternative polyadenylation in regulating stage-dependent functions of important protein regulators in spermatogenic cells.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0006-3363
pubmed:author
pubmed:issnType
Print
pubmed:volume
75
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
318-23
pubmed:dateRevised
2007-12-3
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
A developmental switch in transcription factor isoforms during spermatogenesis controlled by alternative messenger RNA 3'-end formation.
pubmed:affiliation
Department of Molecular and Cellular Physiology, University of Massachusetts Medical School, Worcester, Massachusetts 01655, USA.
pubmed:publicationType
Journal Article, In Vitro, Research Support, N.I.H., Extramural