9EJN | pdb_00009ejn

Crystal structure of magnesium-transporting ATPase MgtA in an E1-like magnesium-bound state

• PDB DOI: https://doi.org/10.2210/pdb9EJN/pdb

• Classification: METAL TRANSPORT
• Organism(s): Lactococcus lactis subsp. lactis CV56
• Expression System: Escherichia coli
• Mutation(s): No 
• Membrane Protein: Yes  PDBTMMemProtMD


• Deposited: 2024-11-28 Released: 2025-02-26 
• 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)

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.55 Å
• R-Value Free: 
  0.339 (Depositor), 0.344 (DCC) 
• R-Value Work: 
  0.288 (Depositor), 0.293 (DCC) 
• R-Value Observed: 
  0.290 (Depositor) 

Starting Model: in silico

Literature

Crystal structure of magnesium-transporting ATPase MgtA in an E1-like magnesium-bound state

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.

Biological Assembly Evidence: gel filtration

Biological Assembly 2  

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

Biological assembly 2 assigned by authors.

Biological Assembly 3  

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

Biological assembly 3 assigned by authors.

Biological Assembly 4  

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

Biological assembly 4 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 406.11 kDa 
• Atom Count: 27,352 
• Modeled Residue Count: 3,556 
• Deposited Residue Count: 3,684 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Magnesium-transporting ATPase, P-type 1	A, B [auth C], C [auth B], D	921	Lactococcus lactis subsp. lactis CV56	Mutation(s): 0  Gene Names: LL275_1350 EC: 7.2.2.14 Membrane Entity: Yes
UniProt
Find proteins for A0A2X0R2L8 (Lactococcus lactis) Explore A0A2X0R2L8  Go to UniProtKB:  A0A2X0R2L8

Small Molecules

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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.55 Å
• R-Value Free:  0.339 (Depositor), 0.344 (DCC) 
• R-Value Work:  0.288 (Depositor), 0.293 (DCC) 
• R-Value Observed: 0.290 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 180.403	α = 90
b = 66.595	β = 90.151
c = 218.666	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-02-26 
Deposition Author(s): Khan, M.B., Primeau, J.O., Basu, P.C., Morth, J.P., Lemieux, M.J., Young, H.S.

---

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

Revision History  

• Version 1.0: 2025-02-26
  Type: Initial release
  
• Version 1.1: 2025-03-05
  Changes: Database references, Structure summary