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⇱ Suppression of apoptosis in mammalian cells by NAIP and a related family of IAP genes | Nature

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Abstract

DYSREGULATION of apoptosis can result in inappropriate suppression of cell death, as occurs in the development of some cancers1, or in failure to control the extent of cell death, as is believed to occur in acquired immunodeficiency and certain neurodegenera-tive disorders, such as spinal muscular atrophy (SMA). Recently, we isolated a candidate gene, encoding neuronal apoptosis inhibitor protein (NAIP)2, for SMA. This gene is homologous to two baculovirus inhibitor of apoptosis proteins3,4(Cp-IAP and Op-IAP) and is partly deleted in individuals with type I SMA. A second SMA candidate gene encoding survival motor neuron (SMN), which is contiguous with the NAIP locus on 5ql3.1, was also reported5. Here we demonstrate a NAIP-mediated inhibition of apoptosis induced by a variety of signals, and have identified three additional human complementary DNAs and a Drosophila melanogaster sequence that are also homologous to the baculovirus lAPs. The four open reading frames (ORFs) possess three baculoviral inhibition of apoptosis protein repeat (BIR) domains and a carboxy-terminal RING zinc-finger. The human iap genes have a distinct but overlapping pattern of expression in fetal and adult tissues. These proteins significantly increase the number of known apoptotic suppressors.

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Author information

Author notes

  1. Alex Mackenzie and Robert G. Korneluk: To whom correspondence should be addressed.

Authors and Affiliations

  1. Molecular Genetics Research Laboratory, Children's Hospital of Eastern Ontario, Ottawa, Ontario, K1H 8L1, Canada

    Peter Listen, Charles Lefebvre, Stephen Baird, Gabriele Cherton-Horvat, Reza Farahani, Michael McLean, Alex Mackenzie & Robert G. Korneluk

  2. ApoptoGen, Inc., University of Ottawa, Ottawa, Ontario, K1H 8L1, Canada

    Peter Listen, Charles Lefebvre, Gabriele Cherton-Horvat, Alex Mackenzie & Robert G. Korneluk

  3. Department of Biochemistry, University of Ottawa, Ottawa, Ontario, K1H 8M5, Canada

    Natalie Roy, Reza Farahani & Alex Mackenzie

  4. Department of Microbiology and Immunology, University of Ottawa, Ottawa, Ontario, K1H 8M5, Canada

    Robert G. Korneluk

  5. Medical and Biological Laboratories Co., Naka-ku, Nagoya, 460, Japan

    Katsuyuki Tamai

  6. The Institute of Medical Science, Tokai University, Kanagawa, 259-11, Japan

    Joh-E lkeda

Authors
  1. Peter Listen
  2. Natalie Roy
  3. Katsuyuki Tamai
  4. Charles Lefebvre
  5. Stephen Baird
  6. Gabriele Cherton-Horvat
  7. Reza Farahani
  8. Michael McLean
  9. Joh-E lkeda
  10. Alex Mackenzie
  11. Robert G. Korneluk

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Cite this article

Listen, P., Roy, N., Tamai, K. et al. Suppression of apoptosis in mammalian cells by NAIP and a related family of IAP genes. Nature 379, 349–353 (1996). https://doi.org/10.1038/379349a0

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  • DOI: https://doi.org/10.1038/379349a0

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