First-pass extracted concept

VDAC1 N-terminal α-helix

Candidate: concept label1 source documents4 linked claims

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Aliases

VDAC1-N

Extracted Explainers

What the tool is doing

The paper identifies the VDAC1 N-terminal α-helix as a segment that becomes exposed upon oligomerization or nanodisc confinement and can bind partner proteins. The abstract specifically links it to BclxL binding and pro-apoptotic activity.

Source 1DOI PubMed

Resources required

The abstract associates its exposure and study with cryo-EM, NMR, X-ray crystallography, biochemical assays, and small lipid nanodiscs. No standalone deployment method is described.

Source 1DOI PubMed

What problem it solves

It helps explain how VDAC1 can couple mitochondrial stress-associated structural changes to apoptosis signaling through BclxL and Bak.

Source 1DOI PubMed

What it does not solve

The abstract does not show that VDAC1-N is a general-purpose reagent or that it independently explains all VDAC-mediated apoptosis pathways.

Source 1DOI PubMed

Alternatives

The abstract compares this mechanism to BH3-only sensitizer Bcl2 proteins as a mechanistic analogue.

Source 1DOI PubMed

Evidence Snippets

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.

Evidence 1Source 1DOI PubMedprovenance

Supporting Sources

Source 1primary paper2025MEDDOI PubMed

1 evidence snippet 4 linked claims Claim 1 Claim 2 Claim 3

Linked Claims

Claim 1binding interactionsupports2025Source 1DOI PubMed

VDAC1-N forms a complex with the BH3-binding groove of the anti-apoptotic Bcl2 protein BclxL.

Quoted textsource-backed

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.

Claim 2functional mechanismsupports2025Source 1DOI PubMed

VDAC1-N has pro-apoptotic activity by promoting Bak pore formation through neutralization of BclxL.

Quoted textsource-backed

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.

Claim 3mechanistic analogysupports2025Source 1DOI PubMed

The VDAC1-N mechanism is reminiscent of BH3-only sensitizer Bcl2 proteins that induce Bax/Bak-mediated mitochondrial outer membrane permeabilization and apoptosis.

Quoted textsource-backed

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.

Claim 4structural mechanismsupports2025Source 1DOI PubMed

VDAC1 oligomerization or confinement in small lipid nanodiscs exposes the VDAC1 N-terminal α-helix, making it available for partner protein binding.

Quoted textsource-backed

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