Transcription factors RFX1/EF-C and ATF-1 associate with the adenovirus E1A-responsive element of the human proliferating cell nuclear antigen promoter

Labrie, C., Lee, B. H., Mathews, M. B. (September 1995) Transcription factors RFX1/EF-C and ATF-1 associate with the adenovirus E1A-responsive element of the human proliferating cell nuclear antigen promoter. Nucleic Acids Res, 23 (18). pp. 3732-41. ISSN 0305-1048 (Print)

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URL: http://www.ncbi.nlm.nih.gov/pubmed/7479004
DOI: 10.1093/nar/23.18.3732

Abstract

The proliferating cell nuclear antigen (PCNA) is an adenovirus E1A-inducible factor that is intimately linked to the processes of DNA replication and cell cycle regulation. Previously, we defined a novel cis-acting element, the PCNA E1A-responsive element (PERE), that confers induction by the E1A 243R oncoprotein upon the human PCNA promoter. To better understand the regulation of PCNA expression by E1A 243R, we have identified cellular transcription factors that associate with the PERE. In electrophoretic mobility shift assays, the PERE formed three major complexes (P1, P2 and P3) with proteins in nuclear extracts from HeLa or 293 cells. Formation of complexes P2 and P3, which correlates with PCNA promoter activity in vivo, requires the activating transcription factor (ATF) binding site found within the PERE [Labrie et al. (1993) Mol. Cell. Biol., 13, 1697-1707]. Antibody interference experiments and mobility shift assays performed with in vitro-synthesized protein indicated that the transcription factor ATF-1 is a major component of these complexes. Similar assays demonstrated that the hepatitis B virus enhancer-associated protein RFX1 constitutes a major component of the P1 complex. In addition, we examined the binding of proteins to the minimal E1A-responsive promoter to identify other factors important for transcription from the PCNA promoter. Mobility shift assays revealed that a fragment encompassing the region from -87 to +62 relative to the transcription initiation site forms at least five complexes, EH1-EH5, with HeLa cell nuclear extracts. The transcription factor YY1 associates with the initiator element of the PCNA promoter. The identification of these transcription factors will allow their roles in the activation of PCNA by E1A to be evaluated.

Item Type: Paper
Uncontrolled Keywords: Activating Transcription Factor 1 Adenovirus E1A Proteins/ physiology Base Sequence Cell Line, Transformed Cell-Free System DNA/metabolism DNA-Binding Proteins/genetics/ metabolism Erythroid-Specific DNA-Binding Factors Hela Cells Humans Models, Genetic Molecular Sequence Data Proliferating Cell Nuclear Antigen/ genetics Promoter Regions (Genetics)/ genetics Protein Biosynthesis Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S. Transcription Factors/genetics/ metabolism YY1 Transcription Factor
Subjects: organism description > virus > adenovirus
organism description > animal > mammal > primates > hominids > human
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification > protein types > transcription factor
CSHL Authors:
Communities: CSHL labs
Depositing User: Jessica Koos
Date: 25 September 1995
Date Deposited: 08 Aug 2014 20:49
Last Modified: 08 Nov 2017 15:57
PMCID: PMC307273
Related URLs:
URI: http://repository.cshl.edu/id/eprint/30611

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