Linked Life Data

8095499

Source:http://linkedlifedata.com/resource/pubmed/id/8095499

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
8
pubmed:dateCreated
1993-4-15
pubmed:abstractText
Basal transcription of the human multidrug resistance (mdr1) promoter was studied by chloramphenicol acetyltransferase (CAT) reporter fusion gene analysis in two parental and doxorubicin-resistant human tumor cell lines. Deletion of mdr1 DNA sequences to -89 relative to the start of transcription (at +1) had little effect on expression. Deletion of nucleotide sequences from -89 to -70, however, resulted in a 5-10-fold reduction in mdrCAT expression. DNase I footprint analysis demonstrated that the region from -85 to -70 was protected from nuclease digestion using nuclear extracts from these cell lines. The sequence between -82 and -73 is perfectly homologous with the 10-base pair Y-box consensus sequence found in the promoters of all major histocompatibility complex class-II (MHC II) genes. The Y-box sequence in MHC II genes is required for accurate and efficient transcription and contains the sequence CCAAT in the reverse orientation (Dorn, A., Durand, B., Marfing, C., Le Meur, M., Benoist, C., and Mathis, D. (1987) Proc. Natl. Acad. Sci. U.S.A. 84, 6249-6253). Mutations in the reverse CCAAT sequence of the Y-box consensus substantially reduced expression of an mdrCAT vector and eliminated nucleoprotein binding in an electrophoretic mobility shift assay. These results suggest that proteins which bind to the putative Y-box consensus sequence are critical for basal transcriptional regulation of the human mdr1 gene.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0021-9258
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
268
pubmed:geneSymbol
mdr1
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
5856-60
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
1993
pubmed:articleTitle
A Y-box consensus sequence is required for basal expression of the human multidrug resistance (mdr1) gene.
pubmed:affiliation
Medicine Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892.
pubmed:publicationType
Journal Article