The 2.2 A crystal structure of human chymase in complex with succinyl-Ala-Ala-Pro-Phe-chloromethylketone: structural explanation for its dipeptidyl carboxypeptidase specificity.

The 2.2 A crystal structure of human chymase in complex with succinyl-Ala-Ala-Pro-Phe-chloromethylketone: structural explanation for its dipeptidyl carboxypeptidase specificity.
复制标题

2.2 人食糜酶与琥珀酰-Ala-Ala-Pro-Phe-氯甲基酮复合物的晶体结构:其二肽基羧肽酶特异性的结构解释。

DOI:
10.1006/jmbi.1998.2462
复制
发表时间:
1999
期刊:
Journal of molecular biology.
影响因子:
--
通讯作者:
Strobl,S
Strobl,S
中科院分区:
--
文献类型:
--
作者:
Pereira,PJ;Wang,ZM;Rubin,H;Huber,R;Bode,W;Schechter,NM;Strobl,S

文献摘要

参考文献

被引文献

相似文献

人糜蛋白酶(HC)是一种由肥大细胞表达的糜蛋白酶样丝氨酸蛋白酶。对与肽基抑制剂琥珀酰-Ala-Ala-Pro-Phe-氯甲基酮(CMK)复合的HC的2.2 μ m晶体结构进行解析,并将其精修至18.4%的晶体学R因子。HC结构表现出典型的糜蛋白酶样丝氨酸蛋白酶的折叠模式,并显示出与大鼠糜蛋白酶2(大鼠肥大细胞蛋白酶II)和人组织蛋白酶G特别相似。肽基-CMK抑制剂与活性位点残基Ser 195和His 57共价结合;肽基部分通过形成短的反平行β折叠并置S1进入框片段214-217。HC是一种高效的血管紧张素转换酶。由结合的氯甲基酮抑制剂的几何形状引导的凝乳酶-血管紧张素I相互作用的建模表明,扩展的底物结合位点包含可能产生有效切割和激活激素所需的二肽基羧肽酶样活性的特征。血管紧张素I的C-末端羧酸基团对接到活性位点裂缝中,最后两个残基延伸超出活性位点,被完美地定位以与Lys 40-Phe 41肽键的酰胺氮和Lys 40侧链的N-铵基团形成有利的氢键和盐桥。这种酰胺定位对于糜酶相关蛋白酶是独特的,并且只有来自灵长类的糜酶在位置40处具有Lys残基。因此,该结构方便地解释了血管紧张素I通过人糜酶优选转化为血管紧张素II。
Human chymase (HC) is a chymotrypsin-like serine proteinase expressed by mast cells. The 2.2 Å crystal structure of HC complexed to the peptidyl inhibitor, succinyl-Ala-Ala-Pro-Phe-chloromethylketone (CMK), was solved and refined to a crystallographic R-factor of 18.4%. The HC structure exhibits the typical folding pattern of a chymotrypsin-like serine proteinase, and shows particularly similarity to rat chymase 2 (rat mast cell proteinase II) and human cathepsin G. The peptidyl-CMK inhibitor is covalently bound to the active-site residues Ser195 and His57; the peptidyl moiety juxtaposes the S1 entrance frame segment 214-217 by forming a short antiparallel β-sheet. HC is a highly efficient angiotensin-converting enzyme. Modeling of the chymase-angiotensin I interaction guided by the geometry of the bound chloromethylketone inhibitor indicates that the extended substrate binding site contains features that may generate the dipeptidyl carboxypeptidase-like activity needed for efficient cleavage and activation of the hormone. The C-terminal carboxylate group of angiotensin I docked into the active-site cleft, with the last two residues extending beyond the active site, is perfectly localized to make a favorable hydrogen bond and salt bridge with the amide nitrogen of the Lys40-Phe41 peptide bond and with the ϵ-ammonium group of the Lys40 side-chain. This amide positioning is unique to the chymase-related proteinases, and only chymases from primates possess a Lys residue at position 40. Thus, the structure conveniently explains the preferred conversion of angiotensin I to angiotensin II by human chymase.
从含有胰蛋白酶原肠激酶切割位点代替天然前肽序列的构建体生产活性重组人食糜酶。
DOI: 10.1515/bchm3.1995.376.11.681
发表时间: 1995
期刊: Biological chemistry Hoppe-Seyler
影响因子: --
作者:
Wang,ZM;Rubin,H;Schechter,NM
通讯作者: Schechter,NM
经苯甲磺酰氟处理的人食糜酶在 1.9 A 下的晶体结构。
DOI: --
发表时间: 1997
期刊: Biochemistry
影响因子: 2.9
作者:
M. Mcgrath;T. Mirzadegan;B. Schmidt
通讯作者: B. Schmidt
DOI: --
发表时间: 1975
影响因子: 5.6
作者:
Wolfram Bode;P. Schwager
通讯作者: P. Schwager
DOI: 10.1136/ard.43.1.76
发表时间: 1984-01-01
影响因子: 27.4
作者:
BROMLEY, M;FISHER, WD;WOOLLEY, DE
通讯作者: WOOLLEY, DE
α-胰凝乳蛋白酶二聚体的精修和结构,分辨率为 1.67-A。
DOI: --
发表时间: 1985
影响因子: 4.8
作者:
R. Blevins;A. Tulinsky
通讯作者: A. Tulinsky