Identification and characterization of CPP32/2Mch2 homolog 1, a novel cysteine protease similar to CPP32

被引:158
作者
Lippke, JA [1 ]
Gu, Y [1 ]
Sarnecki, C [1 ]
Caron, PR [1 ]
Su, MSS [1 ]
机构
[1] VERTEX PHARMACEUT INC,CAMBRIDGE,MA 02139
关键词
D O I
10.1074/jbc.271.4.1825
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
We have identified and characterized a novel cysteine protease named CMH-1 that is a new member of the interleukin 1 beta converting enzyme (ICE) family of proteases with substrate specificity for Asp-X. CMH-1 has the highest similarity to CPP32 (52% amino acid identity) and MCH2 (31% identical). CMH-1 shares conserved amino acid residues that form the core structure of ICE as well as those residues involved in catalysis and in the P1 aspartate binding. Overexpression of CMH-1 in COS cells resulted in the processing of CMH-1 and the induction of apoptosis of transfected cells. Coexpression of CMH-1 with poly(ADP-ribose) polymerase (PARP) also resulted in a specific cleavage of PARP. Purified recombinant CMH-1 cleaved PARP but not interleukin 1 beta precursor in vitro.
引用
收藏
页码:1825 / 1828
页数:4
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