background:
Exendin 4 is a 39 amino acid peptide found in venom from the Gila monster Helicoderma suspectum. It is a member of the glucagon secretin family of peptide hormones and neuropeptides. Exendin 4 is a potent agonist of the GLP1 receptor and hence a potent stimulator of insulin secretion.
Function:
Venom protein that mimics the incretin hormone glucagon-like peptide 1 (GLP-1). It stimulates insulin synthesis and secretion, protects against beta-cell apoptosis in response to different insults, and promotes beta-cell proliferation. It also promotes satiety, reduces food intake, reduces fat deposition, reduces body weight and inhibits gastric emptying. Interacts with GLP-1 receptor (GLP1R). Induces hypotension that is mediated by relaxation of cardiac smooth muscle.
Subcellular Location:
Secreted.
Tissue Specificity:
Expressed by the venom gland.
Similarity:
Belongs to the glucagon family.
Database links:
UniProtKB/Swiss-Prot: P26349.2
Important Note:
This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications.
Exendin-4是从希拉毒蜥唾液中分离的一种多肽激素,由39个氨基酸残基组成,与胰高血糖素样肽1(GLP-1)有53%的同源性。Exendin-4具有高度的组织特异性,仅在希拉毒蜥的唾液腺中表达, 具有促进葡萄糖依赖性的胰岛素分泌、促进β细胞增殖、减慢胃排空、抑制食物摄取和减轻体重等作用。
肠促胰岛素类似物（exendin-4，Ex-4）是从美洲一种毒蜥的唾液中分泌的胰升糖素样肽-1（glucagon-like peptide-1，GLP-1）类似物，它具有促进胰腺胰岛素的分泌、增加胰岛素敏感性及改善胰岛细胞功能的作用，且不被二肽基肽酶Ⅳ（DPP-Ⅳ）分解，血浆半衰期较长，因而在人类，对糖尿病治疗应用来说是稳定、长效的有治疗前景的药物。
钝尾毒蜥 (Gila monster)
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