Identification of mouse Jun dimerization protein 2 as a novel repressor of ATF-2

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Abstract

A mouse cDNA that encodes a DNA-binding protein was identified by yeast two-hybrid screening, using activating transcription factor-2 (ATF-2) as the bait. The protein contained a bZIP (basic amino acid-leucine zipper region) domain and its amino acid sequence was almost identical to that of rat Jun dimerization protein 2 (JDP2). Mouse JDP2 interacted with ATF-2 both in vitro and in vivo via its bZIP domain. It was encoded by a single gene and various transcripts were expressed in all tested tissues of adult mice, as well as in embryos, albeit at different levels in various tissues. Furthermore, mouse JDP2 bound to the cAMP-response element (CRE) as a homodimer or as a heterodimer with ATF-2, and repressed CRE-dependent transcription that was mediated by ATF-2. JDP2 was identified as a novel repressor protein that affects ATF-2-mediated transcription. © 2001 Federation of European Biochemical Societies.

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Jin, C., Ugai, H., Song, J., Murata, T., Nili, F., Sun, K., … Yokoyama, K. K. (2001). Identification of mouse Jun dimerization protein 2 as a novel repressor of ATF-2. FEBS Letters, 489(1), 34–41. https://doi.org/10.1016/S0014-5793(00)02387-5

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