9B46 | pdb_00009b46

Mycolicibacterium smegmatis MmpL5 structure


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structures of the mycobacterial MmpL4 and MmpL5 transporters provide insights into their role in siderophore export and iron acquisition.

Maharjan, R.Zhang, Z.Klenotic, P.A.Gregor, W.D.Tringides, M.L.Cui, M.Purdy, G.E.Yu, E.W.

(2024) PLoS Biol 22: e3002874-e3002874

  • DOI: https://doi.org/10.1371/journal.pbio.3002874
  • Primary Citation of Related Structures:  
    9B43, 9B46, 9DP6

  • PubMed Abstract: 

    The Mycobacterium tuberculosis (Mtb) pathogen, the causative agent of the airborne infection tuberculosis (TB), harbors a number of mycobacterial membrane protein large (MmpL) transporters. These membrane proteins can be separated into 2 distinct subclasses, where they perform important functional roles, and thus, are considered potential drug targets to combat TB. Previously, we reported both X-ray and cryo-EM structures of the MmpL3 transporter, providing high-resolution structural information for this subclass of the MmpL proteins. Currently, there is no structural information available for the subclass associated with MmpL4 and MmpL5, transporters that play a critical role in iron homeostasis of the bacterium. Here, we report cryo-EM structures of the M. smegmatis MmpL4 and MmpL5 transporters to resolutions of 2.95 Å and 3.00 Å, respectively. These structures allow us to propose a plausible pathway for siderophore translocation via these 2 transporters, an essential step for iron acquisition that enables the survival and replication of the mycobacterium.


  • Organizational Affiliation

    Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, Ohio, United States of America.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
MmpL5 protein973Mycolicibacterium smegmatisMutation(s): 0 
Gene Names: MSMEG_1382
Membrane Entity: Yes 
UniProt
Find proteins for A0A653FL90 (Mycolicibacterium smegmatis)
Explore A0A653FL90 
Go to UniProtKB:  A0A653FL90
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A653FL90
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesR01AI145069

Revision History  (Full details and data files)

  • Version 1.0: 2024-10-02
    Type: Initial release
  • Version 1.1: 2025-03-05
    Changes: Data collection, Database references, Structure summary