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-Structure paper
| タイトル | Structural basis of apoptosis induction by the mitochondrial voltage-dependent anion channel. |
|---|---|
| ジャーナル・号・ページ | Nat Commun, Vol. 16, Issue 1, Page 9481, Year 2025 |
| 掲載日 | 2025年10月27日 |
著者 | Melina Daniilidis / Umut Günsel / Georgios Broutzakis / Kira D Leitl / Robert Janowski / Kai Fredriksson / Dierk Niessing / Christos Gatsogiannis / Franz Hagn / ![]() |
| PubMed 要旨 | The voltage-dependent anion channel (VDAC) is the main gateway for metabolites across the mitochondrial outer membrane. VDAC oligomers are connected to apoptosis induced by various stimuli. However, ...The voltage-dependent anion channel (VDAC) is the main gateway for metabolites across the mitochondrial outer membrane. VDAC oligomers are connected to apoptosis induced by various stimuli. However, the mechanistic and structural basis of apoptosis induction by VDAC remains poorly understood. Here, using cryo-EM and NMR we show that VDAC1 oligomerization or confinement in small lipid nanodiscs triggers the exposure of its N-terminal α-helix (VDAC1-N) which becomes available for partner protein binding. NMR and X-ray crystallography data show that VDAC1-N forms a complex with the BH3 binding groove of the anti-apoptotic Bcl2 protein BclxL. Biochemical assays demonstrate that VDAC1-N exhibits a pro-apoptotic function by promoting pore formation of the executor Bcl2 protein Bak via neutralization of BclxL. This mechanism is reminiscent of BH3-only sensitizer Bcl2 proteins that are efficient inducers of Bax/Bak-mediated mitochondrial outer membrane permeabilization and ultimately apoptosis. The VDAC pathway most likely responds to mitochondrial stress or damage. |
リンク | Nat Commun / PubMed:41145501 / PubMed Central |
| 手法 | EM (単粒子) / X線回折 |
| 解像度 | 1.95 - 7.21 Å |
| 構造データ | ![]() EMDB-55061: VDAC1 in cMSP1D1 nanodiscs, monomeric. ![]() EMDB-55062: VDAC1 in cMSP1D1 nanodiscs, dimeric. ![]() EMDB-55094: VDAC1 in cMSP1delH5 nanodiscs ![]() PDB-9hps: |
| 化合物 | ![]() ChemComp-SO4: ![]() ChemComp-HOH: |
| 由来 |
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キーワード | APOPTOSIS / B-cell lymphoma-extra large / BCL-XL / anti-apoptotic / VDAC1 / voltage-dependent anion channel protein / complex / fusion |
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