中文名稱

【鳥嘌呤素】重組人鳥苷素前體

英文名字

Recombinant Human Proguanylin

供應商

ProSpec

產品貨號

HOR-281

產品報價

￥詢價/10ug   ￥1mg   ￥2ug

產品說明書

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購買方式

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產品新聞

背景資料

Heat-stable enterotoxins （STa） are small， cysteine-rich peptides secreted by Escherichia coli that are able to induce diarrhea through the stimulation of an intestine-specific receptor-guanylyl cyclase known as STaR. Binding of STa to STaR induces a dramatic increase in the cGMP content of the cell； the increase， in turn， inhibits salt absorption and stimulates chloride secretion. This imbalance of ions is accompanied by a massive accumulation of water in the gut that gives rise to the diarrhea and dehydration characteristic of enterotoxin activity. The identification of a receptor for STa on intestinal brush border membranes suggested the existence of an endogenous activator， described guanylin， a 15-amino acid peptide purified from rat small intestine， as a potential ligand for the STaR. This peptide shares sequence similarity with STa； see also uroguanylin. The molecular cloning of the human and mouse cDNAs encoding guanylin was reported. The sequences demonstrated that guanylin is present at the C-terminal end of a larger precursor protein. Expression in mammalian cells indicated that the 94- amino acid proguanylin is inactive. The biologically active guanylin can be released by either chemical or enzymatic treatment of proguanylin. By Northern blot analysis and in situ hybridization， showed that expression of guanylin mRNA is restricted to cells of the intestinal epithelium， specifically the Paneth cells at the base of the small intestinal crypts. These results demonstrate that guanylin is an endogenous activator of STaR isolated a cDNA encoding an apparent precursor of guanylin from a human intestinal cDNA library. The mRNA was expressed at high levels in human ileum and colon. In the mouse， interspecific backcross analysis used to map the Guca2 gene to the distal half of mouse chromosome 4 in a region of homology with human chromosome 1p. By fluorescence in situ hybridization mapped the GUCA2 gene to human 1p35-p34 Guanylin is thought to modulate intestinal water/electrolyte transport in a paracrine mode reported the nucleotide sequence of the gene， the characteristics of its circulating molecular form， and its localization in enterochromaffin cells of the gut. The gene， approximately 2.6 kb in size， consists of 3 exons interrupted by 2 introns. The hormonal form of guanylin is a 94-amino acid peptide with a molecular mass of 10.3 kDa. Guanylin is synthesized by gut enterochromaffin cells as a prohormone of 115 amino acids and is processed to the molecular form of 94 amino acids circulating in the blood.

序列

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來源宿主

大腸桿菌中重組表達

溶解建議

提供的重組人鳥苷素前體產品為白色無菌凍干粉末.推薦使用0.2 ml去離子水來配制工作液，確保凍干粉完全溶解. 產品不是無菌的！在細胞培養(yǎng)前請注意過濾滅菌.

保存建議

Store lyophilized protein at -20℃. Aliquot the product after reconstitution to avoid repeated freezing/thawing cycles. Reconstituted protein can be stored at 4℃ for a limited period of time； it does not show any change after two weeks at 4℃. The lyophilized protein remains stable until the expiry date when stored at -20℃.

其他

ProSpec 是一家全球著名細胞因子蛋白生產和研發(fā)的公司，具有20多年的生產經驗，專注于蛋白（重組及合成）生產研發(fā)。我們的核心產品包括：干擾素、白介素、骨蛋白、腫瘤壞死因子、成纖維生長因子、瘦素、干細胞因子、催乳素、表皮生長因子、胰島素樣生長因子、神經生長因子、集落刺激因子、激素、酶、病毒抗原以及各種重組蛋白等。 領先的生產工藝和規(guī)模使其可以提供毫克到克級蛋白，價格優(yōu)于同類公司。絕大部分產品是天然成熟型蛋白，而不含有標簽蛋白。考慮到大部分研究者希望能更靈活地配制蛋白溶液，ProSpec-Tany絕大部分產品沒有添加保護劑或鹽，這就對工藝提出了更高的要求。同時，ProSpec-Tany絕大部分產品為凍干粉，因此易于運輸和保存。

注意

該頁面的中文產品信息的翻譯，僅供參考。準確的產品信息請以廠家的英文說明書為準。下單前，請瀏覽說明書確認。

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