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Regucalcin : ウィキペディア英語版
Regucalcin

Regucalcin is a protein that in humans is encoded by the ''RGN'' gene.〔(【引用サイトリンク】 url = http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=9104 )
The protein encoded by this gene is a highly conserved, calcium-binding protein, that is preferentially expressed in the liver and kidney. It may have an important role in calcium homeostasis. Studies in rats indicate that this protein may also play a role in aging, as it shows age-associated down-regulation. This gene is part of a gene cluster on chromosome Xp11.3-Xp11.23. Alternative splicing results in two transcript variants having different 5' UTRs, but encoding the same protein.〔
Regucalcin is a proposed name for a calcium-binding protein that was discovered in 1978. This protein is also known as Senescence Marker Protein-30 (SMP30). Regucalcin differs from calmodulin and other Ca2+-related proteins as it does not contain an EF-hand motif of Ca2+-binding domain.〔〔 It may regulate the effect of Ca2+ on liver cell functions.〔 From many investigations, regucalcin has been shown to play a multifunctional role in many cell types as a regulatory protein in the intracellular signaling system.
== Gene ==

Regucalcin and its gene (rgn) are identified in 16 species consisting of regucalcin family. Regucalcin is greatly expressed in the liver of rats, although the protein is found in small amounts in other tissues and cells. The rat regucalcin gene consists of seven exons and six introns, and several consensus regulatory elements exist upstream of the 5’-flanking region. The gene is localized on the proximal end of rat chromosome Xq11.1-12 and human Xp11.3-Xp11.23. AP-1, NFI-A1, RGPR-p117, and Wnt/β-catenin/TCF4 can bind to the promoter region of the rat regucalcin gene to mediate the Ca2+ and other siganaling responses with various hormones and cytokines for transcriptional activation.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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