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. 1995 May 1;14(9):1914–1922. doi: 10.1002/j.1460-2075.1995.tb07183.x

A novel human protease similar to the interleukin-1 beta converting enzyme induces apoptosis in transfected cells.

C Faucheu 1, A Diu 1, A W Chan 1, A M Blanchet 1, C Miossec 1, F Hervé 1, V Collard-Dutilleul 1, Y Gu 1, R A Aldape 1, J A Lippke 1, et al.
PMCID: PMC398290  PMID: 7743998

Abstract

We have identified a novel cDNA encoding a protein (named TX) with > 50% overall sequence identity with the interleukin-1 beta converting enzyme (ICE) and approximately 30% sequence identity with the ICE homologs NEDD-2/ICH-1L and CED-3. A computer homology model of TX was constructed based on the X-ray coordinates of the ICE crystal recently published. This model suggests that TX is a cysteine protease, with the P1 aspartic acid substrate specificity retained. Transfection experiments demonstrate that TX is a protease which is able to cleave itself and the p30 ICE precursor, but not to generate mature IL-1 beta from pro-IL-1 beta. In addition, this protein induces apoptosis in transfected COS cells. TX therefore delineates a new member of the growing Ice/ced-3 gene family coding for proteases with cytokine processing activity or involved in programmed cell death.

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