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Article Abstract
RGPR-p117 is a newly discovered transcription factor that specifically binds to the nuclear factor I consensus motif, TTGGC(N)CC, in the promoter region of the regucalcin gene. This gene plays a multifunctional role in cell regulation. The human RGPR-p117 gene comprises 26 exons totaling approximately 4.1 kilobases and is located on chromosome 1q25.2. RGPR-p117 is present in the cytoplasm and is transported into the nucleus via a calcium signaling mechanism. Once there, it enhances the transcription activity of several genes possessing a TTGGC motif. RGPR-p117 gene expression is unaffected by aging, sex, fasting, or refeeding. Furthermore, RGPR-p117 has been demonstrated to localize to cellular components of the plasma membrane, mitochondria, and the endoplasmic reticulum, suggesting a functional role in these organelles. Overexpression of RGPR-p117 inhibits the proliferation of both normal and cancerous cells, while also protecting against apoptotic cell death induced by various signaling factors. RGPR-p117 is an endoplasmic reticulum protein that has been shown to play a role in lipid export. Thus, it should be renamed Sec16 homolog B (SEC16B). RGPR-p117 deficiency affects intestinal lipid transport, suggesting that RGPR-p117/SEC16B may regulate lipid metabolism. Genome-wide association studies have identified RGPR-p117/SEC16B as an obesity-associated gene, suggesting RGPR-p117's involvement in lipid metabolism in obesity. This review discusses RGPR-p117's advanced role in regulating cellular processes, such as cell proliferation and lipid metabolism, as well as its relationship with obesity.
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| http://dx.doi.org/10.1016/j.ijbiomac.2025.147359 | DOI Listing |
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