Cleavage of the nuclear matrix protein NuMA during apoptosis

Experimental Cell Research
C Gueth-HallonetM Osborn

Abstract

NuMA is a component of the nuclear matrix which may play a structural role in the architecture of the interphase nucleus. During apoptosis NuMA is redistributed within the nucleus and is proteolysed from a 238-kDa form to a 180- to 200-kDa form. Here we show that the cleavage site leading to the stable fragment occurs between residues 1701 and 1725. Both the changes in morphology associated with apoptosis and the cleavage of NuMA were retarded by treatment with TPCK but not by treatment by other protease inhibitors including ICE inhibitor II.

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Apoptosis

Apoptosis is a specific process that leads to programmed cell death through the activation of an evolutionary conserved intracellular pathway leading to pathognomic cellular changes distinct from cellular necrosis