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Different binding site requirements for binding and activation for the bipartite enhancer factor EF-1A.

Abstract：

:The human transcription factor EF-1A binds to the purine-rich E1A core enhancer sequence in the adenovirus E1A and E4 and polyomavirus enhancer regions. The consensus binding site for EF-1A resembles that of members of the ets domain protein family. EF-1A activation of transcription requires a dimeric binding site. Analysis of binding sites containing point mutations revealed that EF-1A binding is determined by the core nucleotides of the binding site, while transcriptional activation is determined both by the core and some peripheral nucleotides that do not affect binding. We have purified EF-1A and analyzed its two constituent subunits, EF-1A alpha and EF-1A beta. EF-1A alpha (MW approximately 60kD) makes the primary DNA contacts. EF-1A beta (MW approximately 50 kD) forms a heteromultimeric complex with EF-1A alpha both in solution and on a dimeric binding site. Binding of both EF-1A subunits is necessary, but not sufficient, for transcriptional activation. We present immunochemical and functional evidence that EF-1A alpha is related to the murine ets-related protein GABP alpha and that EF-1A beta is related to the murine protein GABP beta.

journal_name

Nucleic Acids Res

journal_title

Nucleic acids research

authors

Bolwig GM,Bruder JT,Hearing P

doi

10.1093/nar/20.24.6555

keywords:

subject

Has Abstract

pub_date

1992-12-25 00:00:00

pages

6555-64

issue

24

eissn

0305-1048

issn

1362-4962

journal_volume

20

pub_type

杂志文章

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