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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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TOM22, a core component of the mitochondria outer membrane protein translocation pore, is a mitochondrial receptor for the proapoptotic protein Bax.

The association of Bax with mitochondria is an essential step in the implementation of apoptosis. By using a bacterial two-hybrid assay and crosslinking strategies, we have identified TOM22, a component of the translocase of the outer mitochondrial membrane ( TOM), as a mitochondrial receptor of Bax. Peptide mapping showed that the interaction of Bax with TOM22 involved the first alpha helix of Bax and possibly two central alpha helices, which are homologous to the pore forming domains of some toxins. Antibodies directed against TOM22 or an antisense knockdown of the expression of TOM22 specifically inhibited the association of Bax with mitochondria and prevented Bax-dependent apoptosis. In yeast, a haploid strain for TOM22 exhibited a decreased expression of TOM22 and mitochondrial association of ectopically expressed human Bax. Our data provide a new perspective on the mechanism of association of Bax with mitochondria as it involves a classical import pathway.Cell Death and Differentiation (2007) 14, 785-794. doi:10.1038/sj.cdd.4402055; published online 10 November 2006.[1]

References

  1. TOM22, a core component of the mitochondria outer membrane protein translocation pore, is a mitochondrial receptor for the proapoptotic protein Bax. Bellot, G., Cartron, P.F., Er, E., Oliver, L., Juin, P., Armstrong, L.C., Bornstein, P., Mihara, K., Manon, S., Vallette, F.M. Cell Death Differ. (2007) [Pubmed]
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