| 1998 |
Tom6 (yeast) functions as an assembly factor for the TOM general import pore (GIP) complex: in mitochondria lacking Tom6, the interaction between Tom22 and Tom40 is destabilized, causing dissociation of Tom22 and generation of a ~100K subcomplex of Tom40, Tom7, and Tom5. Tom6 is required to promote but not to maintain the stable Tom22–Tom40 association. |
Yeast deletion mutant analysis, sucrose-gradient fractionation, immunoprecipitation of TOM complex components |
Molecular and cellular biology |
High |
9774667
|
| 1998 |
Tom40 dynamically interacts with Tom6 during preprotein translocation; Tom40 exists in a homo-oligomeric assembly and the Tom40 assembly is influenced by Tom6, as shown by cross-linking and native complex analysis in both Neurospora crassa and S. cerevisiae. |
Chemical cross-linking, sucrose gradient sedimentation, native complex analysis |
Molecular and cellular biology |
High |
9710610
|
| 1996 |
Tom6 and Tom7 perform complementary and opposing functions in modulating TOM complex dynamics: Tom6 stabilizes the interaction between receptors (Tom20, Tom22) and Tom40, while Tom7 destabilizes it. Synthetic growth defects in tom7Δ tom6Δ double mutants provide genetic evidence for their functional relationship. |
Yeast deletion genetics, double-mutant epistasis analysis, protein import assays, immunoprecipitation |
The EMBO journal |
High |
8641278
|
| 1999 |
Tom6 is a constituent of the TOM core complex of Neurospora crassa (together with Tom40, Tom22, and Tom7), which forms a double-ring structure with two open pores (~2.1 nm diameter) that exhibits high-conductance channel activity and binds preprotein in a targeting sequence-dependent manner. |
Detergent solubilization, TOM core complex purification, electron tomography, planar lipid bilayer electrophysiology, preprotein binding assay |
The Journal of cell biology |
High |
10579717
|
| 2001 |
Tom6 associates with a 100 kDa intermediate during the multistep assembly of the Tom40-containing GIP complex; this 100 kDa intermediate (Tom40 + Tom5) acquires Tom6 before maturation to the 400 kDa complex, identifying Tom6 as an early-stage assembly factor for Tom40 biogenesis. |
Radiolabeled precursor import assays, sucrose gradient sedimentation, native gel electrophoresis in yeast |
Nature structural biology |
High |
11276259
|
| 2001 |
Tom6 (Neurospora crassa) is in direct contact with Tom40 (by cross-linking) and interacts with Tom22 in a manner dependent on the presence of transiting preproteins. The targeting and assembly information of Tom6 resides in its transmembrane segment and a flanking N-terminal cytosolic segment; both segments are required for assembly into the TOM complex. |
Chemical cross-linking, in vitro import/assembly assays, domain-swap hybrid protein analysis |
The Journal of biological chemistry |
High |
11278536
|
| 2001 |
Tom40 and Tom22 together form the functional core unit of the GIP complex that stably retains accumulated preproteins; under stringent detergent conditions, Tom20 and all three small Tom proteins (including Tom6) are released while the preprotein remains in the Tom40–Tom22 core, demonstrating that Tom6 is dispensable for holding preproteins once import is initiated. |
Detergent fractionation, urea/salt treatment of arrested import intermediates, purified outer membrane vesicle import assays, electrophysiology |
Molecular and cellular biology |
High |
11259583
|
| 2009 |
During Tom40 biogenesis, the SAM-Tom5/Tom40 subcomplex binds the precursor of Tom6 after Tom6 has been inserted into the outer membrane in an Mim1-dependent manner, identifying Tom6 assembly as downstream of Mim1-mediated membrane insertion and dependent on the SAM complex. |
Co-immunoprecipitation of assembly intermediates, BN-PAGE, genetic deletion analysis (SAM subunit and Mim1 mutants) in yeast |
Journal of molecular biology |
High |
20026336
|
| 2009 |
Tom6 and Sam37 are functionally linked by genetic interaction: overexpression of TOM6 suppresses sam37Δ growth defects; overexpression of SAM37 suppresses tom6Δ; double deletion (tom6Δ sam37Δ) is lethal. Tom6 suppression of sam37Δ is linked to Tom6's ability to stabilize Tom40. |
Multicopy suppressor screen, yeast genetic analysis (single and double deletions), protein stability assays |
Molecular and cellular biology |
High |
19797086
|
| 2010 |
Tom6 plays a stimulatory role at an early stage of Tom40 assembly at the SAM complex, antagonistic to Tom7's inhibitory role; Tom5 and Tom6 together promote formation of the mature TOM complex, while Tom7 opposes both Tom5 and Tom6 at this early assembly step. |
Yeast genetic deletion analysis, BN-PAGE, radiolabeled precursor import and assembly assays |
Journal of molecular biology |
High |
21059357
|
| 2014 |
Cell-cycle-dependent regulation of TOM complex assembly involves Cdk1-mediated phosphorylation of the cytosolic precursor of Tom6: cyclin Clb3-activated Cdk1 phosphorylates Tom6, enhancing its import into mitochondria, promoting Tom40 assembly and import of fusion proteins, and stimulating mitochondrial respiratory activity in mitosis. |
In vivo phosphorylation assays, cyclin-Cdk1 kinase assay, import assays with phospho-mimetic/phospho-null Tom6 mutants, mitochondrial respiratory measurements |
Science (New York, N.Y.) |
High |
25378463
|
| 2017 |
Cryo-EM structure of the TOM core complex from Neurospora crassa at near-atomic resolution shows Tom6 as one of three α-helical small subunits (alongside Tom5 and Tom7) surrounding each Tom40 β-barrel pore, contributing to the architecture of the symmetrical dimeric complex. |
Single-particle cryo-electron microscopy, structural modeling |
Cell |
High |
28802041
|
| 2019 |
Cell-cycle-dependent variation of phosphorylated Tom6 modulates the trimeric TOM complex: phospho-Tom6 arising from Cdk1 activity promotes Tom22 integration into the TOM complex; porin Por1 sequesters Tom22 dissociated from trimeric TOM, and this sequestration is enhanced by the cell-cycle-controlled variation of phosphorylated Tom6, linking Tom6 phosphorylation state to TOM complex trimer/dimer equilibrium. |
Co-immunoprecipitation, BN-PAGE, in vivo cell-cycle synchronization, phospho-mimetic Tom6 mutants |
Molecular cell |
High |
30738703
|
| 2020 |
Cryo-EM structure of the dimeric human TOM core complex shows that Tom6 is one of three small α-helical subunits surrounding the Tom40 β-barrel channels; Tom6 has a notable configuration contributing to the overall architecture and the electrostatic features of the complex. |
Single-particle cryo-electron microscopy, structural modeling |
Cell discovery |
High |
33083003
|
| 2008 |
Small Tom proteins including Tom6 (along with Tom22, Tom7, and Tom5) act as modulators of TOM pore dynamics; isolated Tom40 alone (without these subunits) shows no transitions between conductance states at low voltages, whereas the full TOM core complex (containing Tom6) displays robust gating, indicating Tom6 and other small Toms reduce the energy barrier between conformational states. |
Planar lipid bilayer electrophysiology comparing purified Tom40 alone vs. TOM core complex |
Biophysical journal |
Medium |
18456827
|
| 2024 |
In the human TOM holo complex structure, Tom6 stabilizes Tom20 through extensive interactions with Tom22, Tom40, and Tom6 itself; Tom20 is positioned at the center of the complex, stabilized in part by Tom6 contacts. |
Chemical cross-linking to stabilize Tom20, single-particle cryo-electron microscopy (~6 Å resolution) |
PNAS nexus |
Medium |
39071881
|
| 2025 |
PP2A (protein phosphatase 2A), via its regulatory subunit Cdc55, dephosphorylates Ser16 of Tom6 in vitro. Synthetic trap-peptides enriched PP2A and PP4 as full holoenzymes from yeast cytosolic fractions, identifying PP2A as the first phosphatase (eraser) acting on TOM complex phosphorylation. |
Synthetic trap-peptide phosphatase enrichment from yeast cytosol, in vitro dephosphorylation assay with purified PP2A holoenzyme, mass spectrometry identification of regulatory subunits |
The FEBS journal |
High |
40891445
|
| 2025 |
In an Alzheimer disease model, aggregated phospho-S670-GRK2 triggers aggregation of TOMM6 and promotes mitochondrial dysfunction; neuron-specific restoration of TOMM6 expression reduced beta-amyloid plaques but increased soluble beta-amyloid, indicating TOMM6 participates in a GRK2 aggregation-driven mitochondrial dysfunction pathway. |
Transgenic mouse AD model, neuronal TOMM6 overexpression, beta-amyloid quantification, mitochondrial function assays |
Cell reports. Medicine |
Medium |
41895286
|
| 2025 |
Luteolin attenuates vascular calcification via the NF-κB/TOM6/PINK1 mitophagy axis: NF-κB drives TOM6 transcription; TOM6 knockdown attenuates calcification while overexpression exacerbates it; luteolin inhibits NF-κB nuclear translocation (by binding IKKα/IKKβ), suppresses TOM6 expression, and thereby enhances PINK1/Parkin-mediated mitophagy and improves mitochondrial bioenergetics. |
RNA sequencing, siRNA knockdown and overexpression of TOMM6 in vascular smooth muscle cells, in vivo mouse/rat calcification models, molecular docking (luteolin–IKK), Western blotting for mitophagy markers |
European journal of pharmacology |
Medium |
41232657
|
| 2011 |
Tom6 facilitates mitochondrial mRNA localization in a transcript-specific manner: OXA1 mRNA (but not ATP2 mRNA) was mislocalized in tom6Δ yeast cells, suggesting Tom6 contributes to the localization of specific mRNAs to mitochondria. |
Live-cell fluorescence imaging of endogenously tagged mRNAs in tom6Δ yeast, quantitative colocalization analysis |
RNA (New York, N.Y.) |
Medium |
21705432
|
| 2025 |
The Drosophila melanogaster TOM complex structure at 3.3 Å shows Tom6 as one of four endogenous TOM components (Tom22, Tom5, Tom6, Tom7) co-assembled with transgenic Tom40; the Drosophila and human TOM structures are very similar, with small conformational differences at subunit interfaces attributable to lipid-binding residue variation. |
Single-particle cryo-electron microscopy of ex vivo Drosophila TOM complex |
IUCrJ |
Medium |
39575538
|