8TS3

Cryo-EM structure of human MRS2 with Ca2+

• PDB DOI: https://doi.org/10.2210/pdb8TS3/pdb
• EM Map EMD-41589: EMDB EMDataResource

• Classification: METAL TRANSPORT
• Organism(s): Homo sapiens, Escherichia coli
• Expression System: Komagataella pastoris
• Mutation(s): No 
• Membrane Protein: Yes  PDBTM


• Deposited: 2023-08-10 Released: 2024-08-14 
• Deposition Author(s): He, Z., Mount, J.W., Zhang, J., Yuan, P.
• Funding Organization(s): National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.11 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Human mitochondrial MRS2 is a Ca2+-regulated nonselective cation channel

He, Z., Tu, Y., Tsai, C., Mount, J.W., Zhang, J., Tsai, M., Yuan, P.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C5  (Explore in 3D)
Global Stoichiometry: Homo 5-mer - A5 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content

• Total Structure Weight: 277.64 kDa 
• Atom Count: 12,027 
• Modelled Residue Count: 1,505 
• Deposited Residue Count: 2,430 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Magnesium transporter MRS2 homolog, mitochondrial, Soluble cytochrome b562 fusion protein	A, B, C, D, E	486	Homo sapiens, Escherichia coli This entity is chimeric	Mutation(s): 0  Gene Names: MRS2, cybC Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for P0ABE7 (Escherichia coli) Explore P0ABE7  Go to UniProtKB:  P0ABE7
Find proteins for Q9HD23 (Homo sapiens) Explore Q9HD23  Go to UniProtKB:  Q9HD23
PHAROS:  Q9HD23 GTEx:  ENSG00000124532
UniProt Groups	P0ABE7Q9HD23

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CA (Subject of Investigation/LOI)	F [auth A], G [auth A], H [auth A], I [auth B], J [auth C], K [auth D], L [auth E]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.11 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
RECONSTRUCTION	cryoSPARC

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2024-08-14 
Deposition Author(s): He, Z., Mount, J.W., Zhang, J., Yuan, P.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)	United States	R01NS109307

Revision History  

• Version 1.0: 2024-08-14
  Type: Initial release