Molecular cloning and characterization of DEC2, a new member of basic helix-loop-helix proteins |
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Authors: | Fujimoto K Shen M Noshiro M Matsubara K Shingu S Honda K Yoshida E Suardita K Matsuda Y Kato Y |
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Affiliation: | Department of Biochemistry, Hiroshima University School of Dentistry, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan. |
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Abstract: | DEC1 is a basic helix-loop-helix (bHLH) protein related to Drosophila Hairy, Enhancer of split and HES, and involved in the control of proliferation and/or differentiation of chondrocytes, neurons, etc. We report here the identification and characterization of human, mouse and rat DEC2, a novel member of the DEC subfamily. DEC2 had high (97%) and moderate (52%) similarities in the bHLH region and the Orange domain with DEC1, respectively. However, DEC2, but not DEC1, had alanine and glycine-rich regions in the C-terminal half. Unlike Hairy, Enhancer of split and HES, DEC2 lacked the WRPW motif for interaction with the corepressor Groucho. The DEC2 gene was mapped to human chromosome 12p11.23-p12.1, mouse chromosome 6 G2-G3 and rat chromosome 4q43 distal-q4, where the conserved linkage homology has been identified among these species. Unlike DEC1, which was broadly expressed in many tissues, DEC2 showed a more restricted pattern of mRNA expression. The DEC subfamily proteins may play an important role in tissue development. |
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