Abstract
Mouse zinc finger CCHC domain containing 12 gene (ZCCHC12) has been identified as a transcriptional co-activator of bone morphogenetic protein (BMP) signaling, and human ZCCHC12 was reported to be related to non-syndromic X-linked mental retardation (NS-XLMR). However, the details of how human ZCCHC12 involve in the NS-XLMR still remain unclear. In this study, we identified a novel nuclear localization signal (NLS) in the middle of human ZCCHC12 protein which is responsible for the nuclear localization. Multiple-tissue northern blot analysis indicated that ZCCHC12 is highly expressed in human brain. Furthermore, in situ hybridization showed that ZCCHC12 is specifically expressed in neuroepithelium of forebrain, midbrain, and diencephalon regions of mouse E10.5 embryos. Luciferase reporter assays demonstrated that ZCCHC12 enhanced the transcriptional activities of activator protein 1 (AP-1) and cAMP response element binding protein (CREB) as a coactivator. In conclusion, we identified a new NLS in ZCCHC12 and figured out that ZCCHC12 functions as a transcriptional co-activator of AP-1 and CREB.
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