摘要
目的 从蛋白质结构与功能的关系出发,探讨C5aR与其配体C5a的结合位。方法 按分子设计理论,采用亲水性方案寻打C5a胞外区高亲水性区域,Fmoc方案人工合成C5a第9~30位氨基酸基序(P22肽),经高压液相色谱纯化,毛细管电泳鉴定。结果合成多肽(P22)的纯度为95.19%,每次缩合的平均效率为99.78%;能与anti-C5aR McAb(S5/Ⅰ,Serotic公司)有效地结合。
Objective To disc over high hydrophilic profiles of the human C5a receptor(CD88) and the specific highaffinity binding site for its ligand C5a anaphylatoxin form r elationship between the structure and function of the protein and the protein mo lecular design principles. MethodsTh e peptides were synthesized by 431A automatic peptide synthesizer,purified b y high pressure liquid phase chromatography(HPLC) and confirmed by capillary electrophoresis.ResultsThe N-terminus No .9~30 profile of the C5aR (called as P22) could interact wit h anti-C5aR McAb ( S5/1,from Serotic Co.),as determined by ELISA.Furthermore,it could als o inhibit OD490 values remarkably by 10.0 μg/L rhC5a(P<0 .05).In addition,the elevation of cytoplasmic Ca2+ concentrati on induced by 10.0 μg/L rhC5a was inhibited by P22 in dt2cAMP differentiated U937 cells(p<0..01).ConclusionIt is possible that the C5a anaphyla toxin could be removed from the body,and some new types of drug which could be used to treat diseases related to C5a anaphylatoxin could be manufactured.
出处
《免疫学杂志》
CAS
CSCD
北大核心
2000年第6期401-406,共6页
Immunological Journal
基金
This work is supported by National Natural Science Foundation of China!(39770315
39970330 respectively).
关键词
分子设计
C5A
过敏毒素
molecular design
C5a anaphylatoxin
C5a receptor(CD88)