title: The adenovirus E1A binding protein BS69 is a corepressor of transcription through recruitment of N-CoR.
abstract: BS69 was first identified as a protein that interacts directly with the transactivation domain (conserved region 3) of the 289R adenovirus type 5 E1A protein. We show here that BS69 is a potent repressor of transcription. BS69 mediates repression, at least in part, through interaction with the co-repressor N-CoR. BS69 interacts with N-CoR through a MYND domain in its carboxyl terminus. A recently cloned splice variant of BS69, designated BRAM1, is also capable of interacting with N-CoR and E1A, but unlike BS69, is not able to repress transcription, indicating that N-CoR interaction is necessary but not sufficient for BS69 repression. Expression of E1A inhibits repression mediated by BS69. Our data suggest that BS69 participates in transcriptional repressor complexes and that E1A can modulate these complexes through interaction with BS69.
authors.affiliation: Division of Molecular Carcinogenesis and Center for Biomedical Genetics, The Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX Amsterdam, The Netherlands.
authors.forename: H
authors.initials: H
authors.lastname: Masselink
authors.forename: R
authors.initials: R
authors.lastname: Bernards
mesh_terms: D017500:Adenovirus E1A Proteins / Q000235:genetics / Q000378:metabolism*; D020816:Amino Acid Motifs; D000595:Amino Acid Sequence; D001483:Base Sequence; D002352:Carrier Proteins / Q000235:genetics* / Q000378:metabolism*; D018797:Cell Cycle Proteins; D002879:Chromosomes, Human, Pair 10; D056970:Co-Repressor Proteins; D004268:DNA-Binding Proteins; D005786:Gene Expression Regulation; D006801:Humans; D008969:Molecular Sequence Data; D009687:Nuclear Proteins / Q000235:genetics* / Q000378:metabolism; D056971:Nuclear Receptor Co-Repressor 1; D011994:Recombinant Proteins / Q000235:genetics / Q000378:metabolism; D012097:Repressor Proteins / Q000235:genetics* / Q000378:metabolism; D014158:Transcription, Genetic
chemical_list: D017500:Adenovirus E1A Proteins; D002352:Carrier Proteins; D018797:Cell Cycle Proteins; D056970:Co-Repressor Proteins; D004268:DNA-Binding Proteins; C539127:NCOR1 protein, human; D009687:Nuclear Proteins; D056971:Nuclear Receptor Co-Repressor 1; D011994:Recombinant Proteins; D012097:Repressor Proteins; C094763:ZMYND11 protein, human