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    J Biol Chem. 2004 Aug 13;279(33):34087-90. Epub 2004 Jun 24.

    An IAP-IAP complex inhibits apoptosis.

    Dohi T, Okada K, Xia F, Wilford CE, Samuel T, Welsh K, Marusawa H, Zou H, Armstrong R, Matsuzawa S, Salvesen GS, Reed JC, Altieri DC.

    Source

    Department of Cancer Biology and the Cancer Center, University of Massachusetts Medical School, 364 Plantation Street, Worcester, MA 01605, USA.

    Abstract

    Regulators of apoptosis are thought to work in concert, but the molecular interactions of this process are not understood. Here, we show that in response to cell death stimulation, survivin, a member of the inhibitor of apoptosis (IAP) gene family, associates with another IAP protein, XIAP, via conserved baculovirus IAP repeats. Formation of a survivin-XIAP complex promotes increased XIAP stability against ubiquitination/proteasomal destruction and synergistic inhibition of apoptosis, which is abolished in XIAP(-/-) cells. Therefore, orchestration of an IAP-IAP complex regulates apoptosis.

    PMID:
    15218035
    [PubMed - indexed for MEDLINE]
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