Biomaterial Database

Accumulation of p300 mediates transcriptional repression of simian virus 40 enhancer in undifferentiated F9 embryonal carcinoma cells. 1998

M Ota, and K Eto, and Y Ninomiya, and M Ikeda

Department of Developmental Biology, Graduate School of Dentistry, Tokyo Medical and Dental University, Japan.

The SV40 enhancer is repressed in embryonal carcinoma (EC) cells, and it is also repressed by the adenovirus E1A oncoprotein. Repression by E1A is mediated by the binding of E1A to the p300 transcriptional coactivator. Thus, we examined the role of p300 in the repression of the SV40 enhancer activity in EC cells. We demonstrated that high levels of p300 protein are accumulated in undifferentiated EC cells and that the levels decline dramatically upon differentiation because of the changes of protein stability. Furthermore, we showed that overexpression of p300 does not stimulate the SV40 enhancer activity in undifferentiated F9 cells. However, the activity of a p300 mutant deficient for E1A binding can be restored by the presence of excess E1A. In addition, low-level expression of E1A causes derepression of the enhancer activity in F9 cells. These results indicate that the accumulation of p300 protein participates in repression of the SV40 enhancer activity in undifferentiated F9 cells.

UI	MeSH Term	Description	Entries
D009687	Nuclear Proteins	Proteins found in the nucleus of a cell. Do not confuse with NUCLEOPROTEINS which are proteins conjugated with nucleic acids, that are not necessarily present in the nucleus.	Nucleolar Protein,Nucleolar Proteins,Nuclear Protein,Protein, Nuclear,Protein, Nucleolar,Proteins, Nuclear,Proteins, Nucleolar
D011485	Protein Binding	The process in which substances, either endogenous or exogenous, bind to proteins, peptides, enzymes, protein precursors, or allied compounds. Specific protein-binding measures are often used as assays in diagnostic assessments.	Plasma Protein Binding Capacity,Binding, Protein
D012097	Repressor Proteins	Proteins which maintain the transcriptional quiescence of specific GENES or OPERONS. Classical repressor proteins are DNA-binding proteins that are normally bound to the OPERATOR REGION of an operon, or the ENHANCER SEQUENCES of a gene until a signal occurs that causes their release.	Repressor Molecules,Transcriptional Silencing Factors,Proteins, Repressor,Silencing Factors, Transcriptional
D002454	Cell Differentiation	Progressive restriction of the developmental potential and increasing specialization of function that leads to the formation of specialized cells, tissues, and organs.	Differentiation, Cell,Cell Differentiations,Differentiations, Cell
D004268	DNA-Binding Proteins	Proteins which bind to DNA. The family includes proteins which bind to both double- and single-stranded DNA and also includes specific DNA binding proteins in serum which can be used as markers for malignant diseases.	DNA Helix Destabilizing Proteins,DNA-Binding Protein,Single-Stranded DNA Binding Proteins,DNA Binding Protein,DNA Single-Stranded Binding Protein,SS DNA BP,Single-Stranded DNA-Binding Protein,Binding Protein, DNA,DNA Binding Proteins,DNA Single Stranded Binding Protein,DNA-Binding Protein, Single-Stranded,Protein, DNA-Binding,Single Stranded DNA Binding Protein,Single Stranded DNA Binding Proteins
D004742	Enhancer Elements, Genetic	Cis-acting DNA sequences which can increase transcription of genes. Enhancers can usually function in either orientation and at various distances from a promoter.	Enhancer Elements,Enhancer Sequences,Element, Enhancer,Element, Genetic Enhancer,Elements, Enhancer,Elements, Genetic Enhancer,Enhancer Element,Enhancer Element, Genetic,Enhancer Sequence,Genetic Enhancer Element,Genetic Enhancer Elements,Sequence, Enhancer,Sequences, Enhancer
D005786	Gene Expression Regulation	Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control (induction or repression) of gene action at the level of transcription or translation.	Gene Action Regulation,Regulation of Gene Expression,Expression Regulation, Gene,Regulation, Gene Action,Regulation, Gene Expression
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D013539	Simian virus 40	A species of POLYOMAVIRUS originally isolated from Rhesus monkey kidney tissue. It produces malignancy in human and newborn hamster kidney cell cultures.	SV40 Virus,Vacuolating Agent,Polyomavirus macacae,SV 40 Virus,SV 40 Viruses,SV40 Viruses,Vacuolating Agents
D014157	Transcription Factors	Endogenous substances, usually proteins, which are effective in the initiation, stimulation, or termination of the genetic transcription process.	Transcription Factor,Factor, Transcription,Factors, Transcription