Differential modulation of Myb family genes by Ets-2.

Abstract:

:The myb family of genes encodes highly homologous nuclear transcription factors that play distinct roles in the development of breast, germ cells and hematoid organs. While the mechanisms associated with the regulation of these genes remain unknown, the transactivation of c-Myb was previously shown to be upregulated by transcriptional cooperation with Ets-2. The present study examines the transactivation potential of the myb gene family in cooperation with Ets-2. A-Myb and c-Myb showed similar transcriptional cooperation with Ets-2, but not with Ets-1. Interestingly, B-Myb showed no cooperative activity with Ets-2 or Ets-1. Additionally, deletion mutants of A-Myb or c-Myb, where the C-terminal negative regulatory domain was deleted, did not abrogate their ability to cooperate with Ets-2. However, the deletion mutant of B-Myb, where the C-terminal positive regulatory domain was deleted, restored its ability to cooperate with Ets-2. Furthermore, studies using a series of 'domain-swapped' mutants between c-Myb and B-Myb revealed that the C-terminus of B-Myb, which is responsible for the protein's transactivation potential, blocks transcriptional cooperation with Ets-2. These results suggest that the myb gene family can be differentially modulated by Ets-2, and that the C-terminus is the domain that regulates this activity.

journal_name

Oncogene

journal_title

Oncogene

authors

Kang AD,Park G,Kim YH,Oh IH

doi

10.1038/sj.onc.1207537

subject

Has Abstract

pub_date

2004-05-20 00:00:00

pages

4177-81

issue

23

eissn

0950-9232

issn

1476-5594

pii

1207537

journal_volume

23

pub_type

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