The transcriptional co-activator proteins p300 and CBP stimulate adenovirus E1A conserved region 1 transactivation independent of a direct interaction.
p300 and CBP are two related transcriptional co-activator proteins required by many cellular transcription factors for activity. The adenovirus E1A protein binds p300 and CBP through its amino-terminus and conserved region (CR) 1. Fusing CR1 to a heterologous DNA-binding domain creates a potent transcriptional activator, suggesting that CR1 might activate transcription by recruiting p300/CBP to the promoter. We show that both p300 and CBP enhances CR1-dependent transactivation. However, this enhancement occurs independently of a direct interaction with E1A and does not correlate with the CR1 activator function.
Mannervik
M
M
Department of Medical Immunology and Microbiology, BMC, Uppsala University, Sweden.
Akusjärvi
G
G
D017500:Adenovirus E1A Proteins / Q000378:metabolism*; D050882:CREB-Binding Protein; D015500:Chloramphenicol O-Acetyltransferase / Q000235:genetics / Q000378:metabolism; D004926:Escherichia coli / Q000235:genetics; D015870:Gene Expression; D017930:Genes, Reporter; D006367:HeLa Cells; D006801:Humans; D009154:Mutation; D009687:Nuclear Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D011485:Protein Binding; D011993:Recombinant Fusion Proteins / Q000302:isolation & purification / Q000378:metabolism; D015534:Trans-Activators; D014157:Transcription Factors / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D014158:Transcription, Genetic; D015533:Transcriptional Activation / Q000502:physiology*; D014162:Transfection
D017500:Adenovirus E1A Proteins; D009687:Nuclear Proteins; D011993:Recombinant Fusion Proteins; D015534:Trans-Activators; D014157:Transcription Factors; D015500:Chloramphenicol O-Acetyltransferase; D050882:CREB-Binding Protein; C494363:CREBBP protein, human