2023年第1期摘要:采用酶解法制备多棘海盘车多肽,选取胃蛋白酶、木瓜蛋白酶和碱性蛋白酶分别酶解多棘海盘车的水溶性蛋白,获得多肽样品PE-P、PA-P和AP-P。选取胰蛋白酶水解多棘海盘车的水溶性蛋白后再用质量分数为30%,50%,80%的硫酸铵溶液分别沉淀出不同分子量范围的多肽样品P-1,P-2和P-3。然后采用HPLC法分别测定上述多肽的血管紧张素转换酶(ACE)抑制活性。结果表明,PE-P,PA-P和AP-P均具有一定的抑制ACE活性,其中AP-P的抑制活性最好,PA-P次之,PE-P最差,它们的IC50值分别为0.6827,0.5526,0.3328mg/mL。通过对P-1,P-2和P-3分析结果可知,分子量越小的多肽对ACE的抑制活性越显著。关键词:多棘海盘车;多肽;血管紧张素转换酶(ACE)中图分类号:TQ936.16文献标志码:Adoi:10.16693/j.cnki.1671-9646(X).2023.01.001PolypeptideofAsteriasamurensisofPreparationandResearchofitsInhibitoryActivityonACELIMinjing,WANGDi,HULan,SUNQing,LIUShang,JIAOYaqian(CollegeofMarineScienceandEnvironment,DalianOceanUniversity,Dalian,Liaoning116023,China)Abstract:PolypeptideofAsteriasamurensiswaspreparedbyenzymolysismethod.Pepsin,papainandalkalineproteasewereselectedtoenzymolysisthewater-solubleprotein,andPE-P,PA-PandAP-Pwereobtained.PolypeptidesamplesofP-1,P-2andP-3withdifferentmolecularweightrangewereprecipitatedwith30%,50%and80%ammoniumsulfate.ThentheACEinhibitoryactivitiesofthepeptidesweredeterminedbyHPLC.TheresultsshowedthatPE-P,PA-PandAP-Pwereallhadcertaininhibitoryactivity,amongwhichAP-Phadthebestinhibitoryactivity,PA-Pwasthesecond,PE-Pwastheworst,andtheirIC50valueswere0.6827,0.5526,0.3328mg/mL,respectively.Theresultsofp-1,P-2andP-3showedthatthepeptideswithsmallermolecularweighthadmoresignificantinhibitoryactivityonACE.Keywords:Asteriasamurensis;peptide;angiotensinconvertingenzyme(ACE)多棘海盘车多肽的制备及其抑制ACE活性研究李敏晶,王迪,胡澜,孙庆,刘上,焦雅倩(大连海洋大学海洋科技与环境学院,辽宁大连116023)收稿日期:2022-03-02基金项目:辽宁省科技厅自然科学基金指导计划项目(20180550287)。作者简介:李敏晶(1976—),女,博士,副教授,研究方向为天然产物化学。多棘海盘车(Asteriasamurensis),...