9ME9 | pdb_00009me9

Cryo-EM structure of the magnesium transporter MgtA in an E1-like conformation with bound Mg2+ ions

• PDB DOI: https://doi.org/10.2210/pdb9ME9/pdb
• EM Map EMD-48191: EMDB EMDataResource

• Classification: TRANSPORT PROTEIN
• Organism(s): Lactococcus lactis subsp. lactis
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2024-12-06 Released: 2025-12-10 
• Deposition Author(s): Khan, M.B., Primeau, J.O., Basu, P.C., Morth, J.P., Lemieux, M.J., Young, H.S.
• Funding Organization(s): Canadian Institutes of Health Research (CIHR)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.20 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Cryo-EM structure of a membrane transport protein

Khan, M.B., Primeau, J.O., Basu, P.C., Morth, J.P., Lemieux, M.J., Young, H.S.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors and generated by (software)

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 101.58 kDa 
• Atom Count: 6,832 
• Modeled Residue Count: 888 
• Deposited Residue Count: 921 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Magnesium-transporting ATPase, P-type 1	A	921	Lactococcus lactis subsp. lactis	Mutation(s): 0  Gene Names: LL275_1350 EC: 7.2.2.14
UniProt
Find proteins for A0A1V0NGB6 (Lactococcus lactis subsp. lactis) Explore A0A1V0NGB6  Go to UniProtKB:  A0A1V0NGB6

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MG (Subject of Investigation/LOI)	B [auth A], C [auth A], D [auth A]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.20 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.21.2_5419

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-12-10 
Deposition Author(s): Khan, M.B., Primeau, J.O., Basu, P.C., Morth, J.P., Lemieux, M.J., Young, H.S.

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Funding Organization	Location	Grant Number
Canadian Institutes of Health Research (CIHR)	Canada	--

Revision History  

• Version 1.0: 2025-12-10
  Type: Initial release
  
• Version 1.1: 2025-12-31
  Changes: Data collection, Structure summary