5O8O | pdb_00005o8o

N. crassa Tom40 model based on cryo-EM structure of the TOM core complex at 6.8 A

• PDB DOI: https://doi.org/10.2210/pdb5O8O/pdb
• EM Map EMD-3761: EMDB EMDataResource

• Classification: PROTEIN TRANSPORT
• Organism(s): Neurospora crassa
• Mutation(s): No 
• Membrane Protein: Yes  OPMPDBTMMemProtMDmpstruc


• Deposited: 2017-06-13 Released: 2017-08-16 
• Deposition Author(s): Bausewein, T., Mills, D.J., Nussberger, S., Nitschke, B., Kuehlbrandt, W.
• Funding Organization(s): Max Planck Society

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 6.80 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Cryo-EM Structure of the TOM Core Complex from Neurospora crassa.

Bausewein, T., Mills, D.J., Langer, J.D., Nitschke, B., Nussberger, S., Kuhlbrandt, W.

(2017) Cell 170: 693-700.e7

• PubMed: 28802041 
• DOI: https://doi.org/10.1016/j.cell.2017.07.012
• Primary Citation Related Structures: 
  5O8O


• PubMed Abstract: 
  

  The TOM complex is the main entry gate for protein precursors from the cytosol into mitochondria. We have determined the structure of the TOM core complex by cryoelectron microscopy (cryo-EM). The complex is a 148 kDa symmetrical dimer of ten membrane protein subunits that create a shallow funnel on the cytoplasmic membrane surface. In the core of the dimer, the β-barrels of the Tom40 pore form two identical preprotein conduits. Each Tom40 pore is surrounded by the transmembrane segments of the α-helical subunits Tom5, Tom6, and Tom7. Tom22, the central preprotein receptor, connects the two Tom40 pores at the dimer interface. Our structure offers detailed insights into the molecular architecture of the mitochondrial preprotein import machinery.

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Organizational Affiliation: 
• Department of Structural Biology, Max-Planck-Institute of Biophysics, Max-von-Laue-Str. 3, 60438 Frankfurt am Main, Germany.
Department of Molecular Membrane Biology, Max-Planck-Institute of Biophysics, Max-von-Laue-Str. 3, 60438 Frankfurt am Main, Germany.
Abt. Biophysik, Institut für Biomaterialien und biomolekulare Systeme, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany.
Department of Structural Biology, Max-Planck-Institute of Biophysics, Max-von-Laue-Str. 3, 60438 Frankfurt am Main, Germany. Electronic address: [e-mail].

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 generated by PISA (software)

Biological Assembly Evidence: mass spectrometry

Macromolecule Content 

• Total Structure Weight: 38.18 kDa 
• Atom Count: 2,562 
• Modeled Residue Count: 332 
• Deposited Residue Count: 349 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Mitochondrial import receptor subunit tom40	A	349	Neurospora crassa	Mutation(s): 0  Membrane Entity: Yes
UniProt
Find proteins for P24391 (Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987)) Explore P24391  Go to UniProtKB:  P24391

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 6.80 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	Foldit

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2017-08-16 
Deposition Author(s): Bausewein, T., Mills, D.J., Nussberger, S., Nitschke, B., Kuehlbrandt, W.

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Funding Organization	Location	Grant Number
Max Planck Society	Germany	--

Revision History  

• Version 1.0: 2017-08-16
  Type: Initial release
  
• Version 1.1: 2018-10-24
  Changes: Data collection, Database references
• Version 1.2: 2024-05-15
  Changes: Data collection, Database references