项目名称: 两栖动物镇痛肽odorranaopin结构与功能研究
项目编号: No.31260208
项目类型: 地区科学基金项目
立项/批准年度: 2013
项目学科: 生物科学
项目作者: 陈文林
作者单位: 昆明医科大学
项目金额: 48万元
中文摘要: 目前,两栖动物阿片类镇痛肽仅在南美叶泡蛙亚科(Phyllomedusinae)的一些种(Phyllomedusa, Agalychnis and Pachymedusa species)的皮肤分泌液中有发现,如dermorphins和deltorpins,在其他的两栖动物或器官中尚未发现,最近,本课题组报道了一种新型镇痛肽odorranaopin (Biochimie,2011),该肽来源于无指盘臭蛙(Odorrana grahami)脑匀浆液,是首次在蛙科中发现的镇痛肽,前期研究显示,该肽具有很强的镇痛活性,能够抑制由bradykinin诱导的回肠肌收缩。本项目拟在前期工作基础上,定点突变odorranaopin,对这些分子突变体进行结构与功能研究,找到其结构和功能关键位点和氨基酸残基,识别该肽发挥其功能的结构与功能关系及分子机制,为设计、利用高效、专一作用的镇痛肽奠定基础。
中文关键词: 活性多肽;镇痛;两栖动物;定点突变;阿片受体
英文摘要: Amphibian opiate peptides including dermorphins and deltorpins have been recently found only in the skin of South American frogs belonging to the subfamily Phyllomedusinae (Phyllomedusa, Agalychnis and Pachymedusa species).No opiate peptides have ever been identified from other amphibians or organs except skin. Recently we report a novel antinociceptive peptide named odorranaopin from the homogenates of the frog brains(Biochimie), Odorrana grahami, which is also the first antinociceptive peptide found in Ranidae amphibian.Our previous work indicated that odorranaopin have a strong analgesic activity,could inhibit the contractile responses of ileum smooth muscle induced by bradykinin.On the basis of our previous work, this work will process odorranaopin with site-directed mutation,and investigate its structure-function relationships,finally lay a foundation for designing and developing a high-performance and specific analgesic peptide.
英文关键词: bio-active peptides;analgesic;amphibians;site-directed mutation;opioid receptor