Activation of mouse RAG-2 promoter by Myc-associated zinc finger protein.
Recombination activating gene-1 ( RAG-1) and RAG-2 are expressed specifically in lymphocytes undergoing the antigen receptor gene rearrangement during the lymphocyte development. Our previous study showed that the -41 to -17 nucleotides (nt) 5' -upstream region of mouse RAG-2 were pre-requisite for the core promoter activity and that Pax-5/c-Myb/LEF-1 protein-protein complex was responsible for its activity in immature B cells. In this study, we show that the -65/-42 sequence, the non-conserved sequence between human and mouse RAG-2 promoter, is necessary for the full promoter activity for mouse RAG-2. Electrophoresis mobility shift assay revealed that Myc-associated zinc finger protein (MAZ) as well as SP1/3 binds a GA box in this region. Using chromatin immunoprecipitation, we show that MAZ binds the RAG-2 promoter region in pre-B cells. Furthermore, we show that MAZ synergistically activates the murine RAG-2 promoter with Pax-5/c-Myb/LEF-1 complex. These results first demonstrate that MAZ participates in activation of mouse RAG-2 promoter.[1]References
- Activation of mouse RAG-2 promoter by Myc-associated zinc finger protein. Wu, C.X., Zhao, W.P., Kishi, H., Dokan, J., Jin, Z.X., Wei, X.C., Yokoyama, K.K., Muraguchi, A. Biochem. Biophys. Res. Commun. (2004) [Pubmed]
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