Negative regulation of CD4 gene expression by a HES-1-c-Myb complex.

Journal Article

Expression of the CD4 gene is tightly controlled throughout thymopoiesis. The downregulation of CD4 gene expression in CD4(-) CD8(-) and CD4(-) CD8(+) T lymphocytes is controlled by a transcriptional silencer located in the first intron of the CD4 locus. Here, we determine that the c-Myb transcription factor binds to a functional site in the CD4 silencer. As c-Myb is also required for CD4 promoter function, these data indicate that depending on the context, c-Myb plays both positive and negative roles in the control of CD4 gene expression. Interestingly, a second CD4 silencer-binding factor, HES-1, binds to c-Myb in vivo and induces it to become a transcriptional repressor. We propose that the recruitment of HES-1 and c-Myb to the silencer leads to the formation of a multifactor complex that induces silencer function and repression of CD4 gene expression.

Full Text

Duke Authors

Cited Authors

  • Allen, RD; Kim, HK; Sarafova, SD; Siu, G

Published Date

  • May 2001

Published In

Volume / Issue

  • 21 / 9

Start / End Page

  • 3071 - 3082

PubMed ID

  • 11287612

International Standard Serial Number (ISSN)

  • 0270-7306

Digital Object Identifier (DOI)

  • 10.1128/MCB.21.9.3071-3082.2001

Language

  • eng

Conference Location

  • United States