6UMM | pdb_00006umm

A complete structure of the ESX-3 translocon complex

• PDB DOI: https://doi.org/10.2210/pdb6UMM/pdb
• EM Map EMD-20820: EMDB EMDataResource

• Classification: TRANSPORT PROTEIN
• Organism(s): Mycolicibacterium smegmatis MC2 155
• Mutation(s): No 
• Membrane Protein: Yes  OPMPDBTMMemProtMDmpstruc


• Deposited: 2019-10-09 Released: 2019-10-23 
• Deposition Author(s): Poweleit, N., Rosenberg, O.S.
• Funding Organization(s): National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID), National Institutes of Health/Office of the Director

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.70 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

A large inner membrane pore defines the ESX translocon

Poweleit, N., Czudnochowski, N., Nakagawa, R., Murphy, K., Sassetti, C., Rosenberg, O.S.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 10-mer - A4B2C2D2 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: native gel electrophoresis

Macromolecule Content 

• Total Structure Weight: 362.88 kDa 
• Atom Count: 23,658 
• Modeled Residue Count: 3,184 
• Deposited Residue Count: 3,438 
• Unique protein chains: 4

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ESX-3 secretion system protein EccE3	A, F	285	Mycolicibacterium smegmatis MC2 155	Mutation(s): 0  Membrane Entity: Yes
UniProt
Find proteins for A0QQ48 (Mycolicibacterium smegmatis (strain ATCC 700084 / mc(2)155)) Explore A0QQ48  Go to UniProtKB:  A0QQ48

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
ESX-3 secretion system protein EccD3	B, C, G, H	475	Mycolicibacterium smegmatis MC2 155	Mutation(s): 0  Membrane Entity: Yes
UniProt
Find proteins for A0QQ46 (Mycolicibacterium smegmatis (strain ATCC 700084 / mc(2)155)) Explore A0QQ46  Go to UniProtKB:  A0QQ46

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
ESX-3 secretion system ATPase EccB3	D, I	81	Mycolicibacterium smegmatis MC2 155	Mutation(s): 0  EC: 3.6 Membrane Entity: Yes
UniProt
Find proteins for A0QQ39 (Mycolicibacterium smegmatis (strain ATCC 700084 / mc(2)155)) Explore A0QQ39  Go to UniProtKB:  A0QQ39

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
ESX-3 secretion system protein EccC3	E, J	403	Mycolicibacterium smegmatis MC2 155	Mutation(s): 0  Membrane Entity: Yes
UniProt
Find proteins for A0QQ40 (Mycolicibacterium smegmatis (strain ATCC 700084 / mc(2)155)) Explore A0QQ40  Go to UniProtKB:  A0QQ40

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.70 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
RECONSTRUCTION	RELION
MODEL REFINEMENT	PHENIX

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2019-10-23 
Deposition Author(s): Poweleit, N., Rosenberg, O.S.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)	United States	1RO1AI128214
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)	United States	1U19AI135990-01
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)	United States	PO1AI095208
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)	United States	5T32AI060537
National Institutes of Health/Office of the Director	United States	1S10OD021741

Revision History  

• Version 1.0: 2019-10-23
  Type: Initial release
  
• Version 1.1: 2019-12-18
  Changes: Author supporting evidence
• Version 1.2: 2024-03-20
  Changes: Data collection, Database references
• Version 1.3: 2025-06-04
  Changes: Data collection, Structure summary