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An Inr-containing sequence flanking the TATA box of the human c-sis (PDGF-B) proto-oncogene promoter functions in cis as a co-activator for its intronic enhancer
Vise andre og tillknytning
1995 (engelsk)Inngår i: Oncogene, ISSN 0950-9232, E-ISSN 1476-5594, Vol. 11, nr 9, s. 1873-1884Artikkel i tidsskrift (Annet vitenskapelig) Published
Abstract [en]

High-level activity of the human PDGF-B promoter in choriocarcinoma cell lines depends upon an atypical, intronic enhancer-like element which does not function with heterologous promoters tested. An extensive series of mutant PDGF-B promoter-driven constructs identified a sequence flanking the TATA box which is required specifically for enhancer-mediated transcription in human choriocarcinoma cell lines. This element, which we here term an enhancer-dependent cis co-activator (EDC) contains an Inr (initiator) consensus sequence upstream of the TATA box which is required, but not sufficient for its function. Requirement for the EDC is cell type-specific, since it was dispensable for enhancer-mediated transcription in a human breast cancer cell line. Although it lies within the region defined, the TATA box itself is not required for EDC function, or for basal promoter function which may derive from a second Inr-like sequence situated at the transcriptional start site. These observations indicate that interactions between some promoter and enhancer elements may be more complex than that generally described for 'classical' enhancer systems and may suggest an additional function for the initiator motif.

sted, utgiver, år, opplag, sider
1995. Vol. 11, nr 9, s. 1873-1884
Emneord [en]
PDGF-B, C-SIS, INR, Enhancer Promotor Interactions, Growth Factor, Cell Lines, Transcription Initiation, Regulatory Elements, Messenger RNAS, 1st Intron, Gene, Expression, Region, Identification
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Identifikatorer
URN: urn:nbn:se:uu:diva-85215PubMedID: 7478617OAI: oai:DiVA.org:uu-85215DiVA, id: diva2:113123
Merknad
Addresses: FRANKLIN GC, UPPSALA UNIV, DEPT ANIM DEV & GENET, NORBYVAGEN 18A, S-75236 UPPSALA, SWEDEN.Tilgjengelig fra: 2007-02-12 Laget: 2007-02-12 Sist oppdatert: 2017-12-14bibliografisk kontrollert

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Ullerås, ErikOhlsson, Rolf

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