The Caenorhabditis elegans CED-9 protein does not directly inhibit the caspase CED-3, in vitro nor in yeast.

Journal Article (Journal Article)

A genetically defined pathway orchestrates the removal of 131 of the 1090 somatic cells generated during the development of the hermaphrodite nematode Caenorhabditis elegans. Regulation of apoptosis is highly evolutionarily conserved and the nematode cell death pathway is a valuable model for studying mammalian apoptotic pathways, the dysregulation of which can contribute to numerous diseases. The nematode caspase CED-3 is ultimately responsible for the destruction of worm cells in response to apoptotic signals, but it must first be activated by CED-4. CED-9 inhibits programmed cell death and considerable data have demonstrated that CED-9 can directly bind and inhibit CED-4. However, it has been suggested that CED-9 may also directly inhibit CED-3. In this study, we used a yeast-based system and biochemical approaches to explore this second potential mechanism of action. While we confirmed the ability of CED-9 to inhibit CED-4, our data argue that CED-9 can not directly inhibit CED-3.

Full Text

Duke Authors

Cited Authors

  • Jabbour, AM; Ho, P-K; Puryer, MA; Ashley, DM; Ekert, PG; Hawkins, CJ

Published Date

  • December 2004

Published In

Volume / Issue

  • 11 / 12

Start / End Page

  • 1309 - 1316

PubMed ID

  • 15543163

International Standard Serial Number (ISSN)

  • 1350-9047

Digital Object Identifier (DOI)

  • 10.1038/sj.cdd.4401501


  • eng

Conference Location

  • England