为进一步认识蟹类的过敏原,采用免疫印迹方法,分析发现甲壳类过敏患者血清能与拟穴青蟹肌浆蛋白中分子质量约为21 kD的蛋白质产生特异的IgE结合反应,结果显示该蛋白可能是蟹类新型过敏原。通过硫酸铵盐析、阴离子交换和凝胶过滤柱层析等方法对21 kD-蛋白进行分离纯化,采用Western blotting和基质辅助激光解析电离飞行时间质谱(matrix assisted laser desorption ionization-time of flight-mass spectrometry,MALDI-TOF-MS)确认纯化的21 kD-蛋白为肌质钙结合蛋白(sarcoplasmic calcium binding protein,SCP)。采用SMART-RACE(Switching Mechanism At RNA Termini-Rapid Amplification of cDNA Ends)的方法获得SCP的cDNA序列,该序列全长986 bp,开放阅读框为579 bp,编码193个氨基酸,其理论分子质量21.94 kD,等电点4.44。拟穴青蟹SCP与甲壳类动物SCP具有较高的同源性,与昆虫SCP的同源...
【英文摘要】
For acquiring more information about crab allergens, a 21 kD protein was purified from Scylla paramamosain by ammonium sulfate fractionation, anion exchange chromatography and gel filtration column chromatography. The protein was identified as a novel allergen having IgE binding activity with serum from shellfish-allergic patients. According to the results of Western blotting and matrix assis ted laser desorption ionization-time of flight-mass spectrometry(MALDI-TOF/ TOF-MS) studies, the protein was confirm...
【基金】
国家自然科学基金项目(31171660);
福建省杰出青年科学基金项目(2010J06012)
【更新日期】
2014-04-01
【分类号】
TS254.2
【正文快照】
食物过敏是一类常见的变态反应疾病,近年来其发病率明显上升。临床症状主要有腹痛、腹泻、呕吐、皮疹、哮喘等,严重时会威胁人们的生命。甲壳类动物是联合国粮食及农业组织公布的八大类过敏食物之一,其含有多种过敏原,如:原肌球蛋白(tropomyosin,TM)、精氨酸激酶(arginine kina