Linked Life Data

10521659

Source:http://linkedlifedata.com/resource/pubmed/id/10521659

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1999-11-8
pubmed:databankReference
pubmed:abstractText
The T-cell protein tyrosine phosphatase (TC PTP) is expressed ubiquitously at all stages of mammalian development. However, mRNA levels fluctuate in a cell-cycle-dependent manner, reaching peak levels in late G1, and rapidly decreasing in S phase. Furthermore, TC PTP being present in higher amounts in lymphoid tissues, we have recently shown that it is essential for proper maintenance of both the bone marrow micro-environment and B- and T-cell functions. In order to better understand the elements controlling the expression pattern of this gene, we have isolated and characterized approx. 4kb of the murine TC PTP promoter. DNA sequencing of the proximal 5' region revealed the absence of both TATAA and CAAT boxes. Primer extension analysis and S1 nuclease mapping techniques identified multiple transcription initiation sites. Functional promoter activity was determined using transfection experiments of promoter deletion constructs fused to a CAT reporter construct. Our results indicate that the minimal promoter sequence required for functional expression is contained within the first 147bp of the TC PTP promoter. In addition, consistent with the cell-cycle-dependent expression of TC PTP, we localized a domain between 492 and 1976bp from the transcription initiation site through which repression occurs. In conclusion, although initiator-driven transcription allows for ubiquitous expression of TC PTP, we define general transcription motifs present within the promoter that may mediate specific modulations of the TC PTP gene.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0378-1119
pubmed:author
pubmed:issnType
Print
pubmed:day
17
pubmed:volume
237
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
351-60
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed-meshheading:10521659-3T3 Cells, pubmed-meshheading:10521659-Animals, pubmed-meshheading:10521659-Base Sequence, pubmed-meshheading:10521659-Binding Sites, pubmed-meshheading:10521659-Cell Cycle, pubmed-meshheading:10521659-Cell Line, pubmed-meshheading:10521659-Chloramphenicol O-Acetyltransferase, pubmed-meshheading:10521659-Cloning, Molecular, pubmed-meshheading:10521659-DNA, pubmed-meshheading:10521659-Female, pubmed-meshheading:10521659-Humans, pubmed-meshheading:10521659-Mice, pubmed-meshheading:10521659-Mice, Inbred Strains, pubmed-meshheading:10521659-Molecular Sequence Data, pubmed-meshheading:10521659-Promoter Regions, Genetic, pubmed-meshheading:10521659-Protein Tyrosine Phosphatase, Non-Receptor Type 2, pubmed-meshheading:10521659-Protein Tyrosine Phosphatases, pubmed-meshheading:10521659-Recombinant Fusion Proteins, pubmed-meshheading:10521659-Sequence Analysis, DNA, pubmed-meshheading:10521659-Transcription, Genetic, pubmed-meshheading:10521659-Transcription Factors, pubmed-meshheading:10521659-Tumor Cells, Cultured
pubmed:year
1999
pubmed:articleTitle
Promoter analysis of the murine T-cell protein tyrosine phosphatase gene.
pubmed:affiliation
Department of Biochemistry, McIntyre Medical Sciences Building McGill University, Montreal, Quebec, Canada.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't