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Lipidic Pore Formation by the Concerted Action of Proapoptotic BAX and tBID

Open access
Terrones, Oihana, Antonsson, Bruno, Yamaguchi, Hirohito, Wang, Hong-Gang, Liu, Jihua, Lee, Ray M., Herrmann, Andreas, Basañez, Gorka·2004·Journal of Biological Chemistry

Abstract

BCL-2 homology 3 (BH3)-only proteins of the BCL-2 family such as tBID and BIM(EL) assist BAX-type proteins to breach the permeability barrier of the outer mitochondrial membrane, thereby allowing cytoplasmic release of cytochrome c and other active inducers of cell death normally confined to the mitochondrial inter-membrane space. However, the exact mechanism by which tBID and BIM(EL) aid BAX and its close homologues in this mitochondrial protein release remains enigmatic. Here, using pure lipid vesicles, we provide evidence that tBID acts in concert with BAX to 1) form large membrane openings through both BH3-dependent and BH3-independent mechanisms, 2) cause lipid transbilayer movement concomitant with membrane permeabilization, and 3) disrupt the lipid bilayer structure of the membrane by promoting positive monolayer curvature stress. None of these effects were observed with BAX when BIM(EL) was substituted for tBID. Based on these data, we propose a novel model in which tBID assists BAX not only via protein-protein but also via protein-lipid interactions to form lipidic pore-type non-bilayer structures in the outer mitochondrial membrane through which intermembrane prodeath molecules exit mitochondria during apoptosis.

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Metadata

Authors
Terrones, O., Antonsson, B., Yamaguchi, H., Wang, H.-G., Liu, J., Lee, R. M., Herrmann, A., & Basañez, G.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2004-07
Volume
279
Issue
29
Pages
30081-30091
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2090155976
Cited by
241
References
4
FWCI
5.69
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Lipidic Pore Formation by the Concerted Action of Proapoptotic BAX and tBID. https://app.cochat.ai/papers/10.1074/jbc.m313420200
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Terrones, O., Antonsson, B., Yamaguchi, H., Wang, H.-G., Liu, J., Lee, R. M., Herrmann, A., & Basañez, G. (2004). Lipidic Pore Formation by the Concerted Action of Proapoptotic BAX and tBID. Journal of Biological Chemistry. https://doi.org/10.1074/jbc.m313420200

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