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驴胎盘蛋白的组成分析

2021-07-16樊雨梅汝文文张建岭解晓廖峰

安徽农业科学 2021年11期

樊雨梅 汝文文 张建岭 解晓 廖峰

摘要 采用蛋白质传统分离技术结合基质辅助激光解吸电离飞行时间质谱(MALDI-TOF/TOF/MS)揭示驴胎盘蛋白质的性质和组成,结果表明,驴胎盘蛋白含量为(15.62±1.04)%,等电点均匀分布酸性和碱性区域,分子量主要集中在7~19、36~78 kD 2个区域。通过与马科蛋白图库进行对比,检索出3 865种可识别的蛋白,进一步对驴胎盘蛋白进行生物信息学分析,发现驴胎盘蛋白主要参与了内质网蛋白质加工、ECM-受体相互作用、内质网应激反应等生物学过程,为驴胎盘药理活性成分的筛选提供了理论基础。

关键词 驴胎盘;基本特性;蛋白质组分;生物信息学

中图分类号 S-822文献标识码 A文章编号 0517-6611(2021)11-0168-05

doi:10.3969/j.issn.0517-6611.2021.11.046

开放科学(资源服务)标识码(OSID):

Analysis of the Composition in Protein from Donkey Placenta

FAN Yu-mei1,2, RU Wen-wen1,2, ZHANG Jian-ling1,2 et al

(1. National Engineering Research Center for Gelatin-based Traditional Chinese Medicine, Donge,Shandong 252201;2. Dong-E-E-Jiao Co., Ltd., Donge, Shandong 252201)

Abstract SDS-PAGE gel electrophoresis and MALDI-TOF/TOF/MS were used to reveal the properties and composition of protein in donkey placenta.The results showed that the protein content of the donkey placenta was (15.62±1.04)%, the isoelectric point was evenly distributed in the acidic and basic regions, and the molecular weight was mainly concentrated in the two regions of 7-19 and 36-78 kD. By comparing with the equine protein library, 3 865 identifiable proteins were retrieved, and further analysis of donkey placental proteins was performed. It was found that donkey placental proteins were mainly involved in biological processes such as protein processing in endoplasmic reticulum, ECM-receptor interaction and response to endoplasmic reticulum stress. It provided a theoretical basis for the screening of donkey placenta pharmacologically active ingredients.

Key words Donkey placenta;Basic properties;Protein fraction;Bioinformatics

动物来源药材是我国传统药物的重要组成部分,胎盘作为传统中药,经过长期的实践经验和现代科学研究证明,胎盘及其提取物具有抗氧化[1]、抗疲劳[2-3]、延缓衰老[4]、伤口愈合[5]、调节皮肤炎症[6]、调节免疫[7]和改善肝损伤[8-10]等作用。胎盘的生物活性与其所含有的化学成分密切相关[11-13]。目前研究表明,胎盘富含多种生物成分,包括免疫球蛋白、胶原蛋白、激素、生长因子、细胞因子、氨基酸、酶及微量元素等[12,14]。Togashi等[12,15]研究发现,人胎盘提取物的抗氧化活性与其所含的尿嘧啶、酪氨酸、苯丙氨酸有关。也有研究表明,胎盘蛋白及多肽是胎盘发挥抗氧化、伤口愈合、抗衰老、抗疲劳、免疫调节等作用的物质基础[12-14,16-17]。

近年来,关于胎盘的研究国内外学者主要集中在胎盘成分的检测、动物胎盘功效成分的制备及其功效研究,但蛋白类成分的组成、鉴定研究较少。……

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