Activation of transcription by PU.1 requires both acidic and glutamine domains.
AUTOR(ES)
Klemsz, M J
RESUMO
The B-lymphocyte- and macrophage-specific transcription factor PU.1 is a member of the ets family of proteins. To understand how PU.1 functions as a transcription factor, we initiated a series of experiments to define its activation domain. Using deletion analysis, we showed that the activation domain of PU.1 is located in the amino-terminal half of the protein. Within this region, we identified three acidic subdomains and one glutamine-rich subdomain. The deletion of any of these subdomains resulted in a significant loss in the ability of PU.1 to transactivate in cotransfection studies. Amino acid substitution analysis showed that the activation of transcription by PU.1 requires acidic residues between amino acids 7 and 74 and a group of glutamine residues between amino acids 75 and 84. These data show that PU.1 contains two types of known activation domains and that both are required for maximal transactivation.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=231014Documentos Relacionados
- Synergistic enhancement of both initiation and elongation by acidic transcription activation domains.
- Normal Myeloid Development Requires Both the Glutamine-Rich Transactivation Domain and the PEST Region of Transcription Factor PU.1 but Not the Potent Acidic Transactivation Domain
- CD18 (beta 2 leukocyte integrin) promoter requires PU.1 transcription factor for myeloid activity.
- The Ets-related transcription factor PU.1 immortalizes erythroblasts.
- Transcriptional activation by TFIIB mutants that are severely impaired in interaction with promoter DNA and acidic activation domains.