Crossref journal-article
Wiley
Journal of Cellular Biochemistry (311)
Abstract

AbstractTranscription factor AP‐1 mediates induction of a set of genes in response to the phorbol ester tumor promoter TPA. Recently, AP‐I preparations from HeLa cells were shown to contain a product of the c‐JUN protooncogene (Jun/AP‐l) which forms a tight complex with the Fos protein. In this paper, we examine the role of the Fos protein in the DNA‐binding activity of the AP‐I complex. We show that the DNA‐binding activity of bacterially expressed trpE‐Jun fusion proteins is increased many‐fold upon their interaction with Fos (or a Fos‐relaied antigen) expressed from a baculovirus vector. The site of Fos interaction is within the DNA‐binding domain of Jun/AP‐l, and anti‐Fos antibodies interfere with the binding of affinity purified AP‐1 to DNA. These results suggest that, by associating with Jun/AP‐l, Fos is responsible for the formation of a multimeric protein complex that has greater affinity for the target sequence than does Jun/AP‐l alone.

Authors 5
  1. Elizabeth A. Allegretto (first)
  2. Tod Smeal (additional)
  3. Peter Angel (additional)
  4. Bruce M. Spiegelman (additional)
  5. Michael Karin (additional)
Dates
Type When
Created 20 years, 8 months ago (Dec. 30, 2004, 10:25 a.m.)
Deposited 1 year, 10 months ago (Oct. 22, 2023, 3:41 p.m.)
Indexed 1 year, 2 months ago (June 17, 2024, 2:38 p.m.)
Issued 35 years, 5 months ago (April 1, 1990)
Published 35 years, 5 months ago (April 1, 1990)
Published Online 21 years, 6 months ago (Feb. 19, 2004)
Published Print 35 years, 5 months ago (April 1, 1990)
Funders 0

None

@article{Allegretto_1990, title={DNA‐binding activity of jun is increased through its interaction with Fos}, volume={42}, ISSN={1097-4644}, url={http://dx.doi.org/10.1002/jcb.240420403}, DOI={10.1002/jcb.240420403}, number={4}, journal={Journal of Cellular Biochemistry}, publisher={Wiley}, author={Allegretto, Elizabeth A. and Smeal, Tod and Angel, Peter and Spiegelman, Bruce M. and Karin, Michael}, year={1990}, month=apr, pages={193–206} }