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KL Q9UEF7

Klotho (EC 3.2.1.31) [切割产生:Klotho肽]

蛋白质信息 (UniProt)

Klotho (EC 3.2.1.31) [切割产生:Klotho肽]

Q9UEF7

功能描述

可能对葡萄糖醛酸化类固醇具有较弱的糖苷酶活性。然而,其在239位和872位缺乏关键的活性位点Glu残基,提示其在体内可能作为糖苷酶无活性。可能通过抑制活性维生素D的合成参与钙和磷稳态的调节 (By similarity)。是FGF23与FGFR1之间特异性相互作用的关键因子 (By similarity)。 {ECO:0000250}.; FUNCTION: 由膜结合型同工型裂解产生的Klotho肽可能是一种抗衰老循环激素,通过抑制胰岛素/IGF1信号传导来延长寿命。 {ECO:0000250}.

组织特异性

Present in cortical renal tubules (at protein level). Soluble peptide is present in serum and cerebrospinal fluid. Expressed in kidney, placenta, small intestine and prostate. Down-regulated in renal cell carcinomas, hepatocellular carcinomas, and in chronic renal failure kidney.

亚细胞定位

[Isoform 1]: Cell membrane

关键词

3D-structure Alternative splicing Cell membrane Disease variant Glycoprotein Glycosidase Hormone Hydrolase Membrane Proteomics identification