9J7B | pdb_00009j7b

local refinement of FEM1B bound with TOM20(tetramer)


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.12 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

TOM20-driven E3 ligase recruitment regulates mitochondrial dynamics through PLD6.

Raiff, A.Zhao, S.Bekturova, A.Zenge, C.Mazor, S.Chen, X.Ru, W.Makaros, Y.Ast, T.Ordureau, A.Xu, C.Koren, I.

(2025) Nat Chem Biol 

  • DOI: https://doi.org/10.1038/s41589-025-01894-4
  • Primary Citation of Related Structures:  
    9J77, 9J78, 9J79, 9J7A, 9J7B, 9JCE, 9LKX, 9LKY

  • PubMed Abstract: 

    Mitochondrial homeostasis is maintained through complex regulatory mechanisms, including the balance of mitochondrial dynamics involving fusion and fission processes. A central player in this regulation is the ubiquitin-proteasome system (UPS), which controls the degradation of pivotal mitochondrial proteins. In this study, we identified cullin-RING E3 ligase 2 (CRL2) and its substrate receptor, FEM1B, as critical regulators of mitochondrial dynamics. Through proteomic analysis, we demonstrate here that FEM1B controls the turnover of PLD6, a key regulator of mitochondrial dynamics. Using structural and biochemical approaches, we show that FEM1B physically interacts with PLD6 and that this interaction is facilitated by the direct association of FEM1B with the mitochondrial import receptor TOM20. Ablation of FEM1B or disruption of the FEM1B-TOM20 interaction impairs PLD6 degradation and induces mitochondrial defects, phenocopying PLD6 overexpression. These findings underscore the importance of FEM1B in maintaining mitochondrial morphology and provide further mechanistic insights into how the UPS regulates mitochondrial homeostasis.


  • Organizational Affiliation

    Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Protein fem-1 homolog BA [auth J],
B [auth A],
F [auth O],
G [auth P]
627Homo sapiensMutation(s): 0 
Gene Names: FEM1BF1AAKIAA0396
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UK73 (Homo sapiens)
Explore Q9UK73 
Go to UniProtKB:  Q9UK73
PHAROS:  Q9UK73
GTEx:  ENSG00000169018 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9UK73
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Mitochondrial import receptor subunit TOM20 homologC [auth B],
D [auth G],
H [auth Q],
J [auth S],
K [auth C]
121Homo sapiensMutation(s): 0 
Gene Names: TOMM20KIAA0016
UniProt & NIH Common Fund Data Resources
Find proteins for Q15388 (Homo sapiens)
Explore Q15388 
Go to UniProtKB:  Q15388
PHAROS:  Q15388
GTEx:  ENSG00000173726 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ15388
Sequence Annotations
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  • Reference Sequence

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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Poly-UNKE [auth D]12Homo sapiensMutation(s): 0 
Sequence Annotations
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  • Reference Sequence

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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Poly-UNKI [auth R]9Homo sapiensMutation(s): 0 
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.12 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China--

Revision History  (Full details and data files)

  • Version 1.0: 2025-04-09
    Type: Initial release
  • Version 1.1: 2025-04-30
    Changes: Data collection, Database references
  • Version 1.2: 2025-05-07
    Changes: Data collection, Database references