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J. Virol., 10 1997, 7978-7983, Vol 71, No. 10
JM Mazzarelli, G Mengus, I Davidson and RP Ricciardi
The CR3 activation domain of the human adenovirus E1A protein stimulates
transcription by forming protein-protein interactions with DNA
sequence-specific binding factors and components of the TFIID complex.
Here, we demonstrate that CR3 can complex with the extreme C- terminal 105
amino acids of the human TATA box binding-factor- associated protein,
hTAF(II)135. Furthermore, the C-terminal region of hTAF(II)135 can block
transcriptional stimulation from an E1A-inducible promoter in vivo. This
ability of the C terminus of hTAF(II)135 to bind CR3 and to inhibit
E1A-inducible activation is highly specific. These results demonstrate for
the first time that a discrete fragment of a mammalian TBP-associated
factor which targets a specific activator can impair the stimulation of
transcription.
Copyright © 1997, American Society for Microbiology
The transactivation domain of adenovirus E1A interacts with the C terminus of human TAF(II)135
Department of Microbiology, School of Dental Medicine, University of Pennsylvania, Philadelphia 19104, USA.
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