11WR | pdb_000011wr

Cryo-EM structure of Candida albicans fluoride channel FEX in complex with Fab fragment in LiCl

• PDB DOI: https://doi.org/10.2210/pdb11WR/pdb
• EM Map EMD-76140: EMDB EMDataResource

• Classification: MEMBRANE PROTEIN
• Organism(s): Homo sapiens, HIV-1 M:B_MN, Candida albicans SC5314
• Expression System: Cricetulus griseus, Saccharomyces cerevisiae
• Mutation(s): No 


• Deposited: 2026-03-16 Released: 2026-08-19 
• Deposition Author(s): Kang, C.-Y., Stockbridge, R.B.
• Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

---

Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.56 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Starting Models: experimental

Literature

The structural mechanism of fluoride channel inhibition by lithium in eukaryotes

Kang, C.-Y., Heidari, S., Kolb, S., An, M., Ohi, M.D., Torabifard, H., Stockbridge, R.B.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1B1C1 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 86.32 kDa 
• Atom Count: 5,843 
• Modeled Residue Count: 766 
• Deposited Residue Count: 795 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
10E8v4 Fab Heavy Chain	A	232	Homo sapiens	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
10E8v4 Fab Light Chain	B	210	Homo sapiens	Mutation(s): 0

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Transmembrane protein gp41,Fluoride export protein 1	C	353	HIV-1 M:B_MN, Candida albicans SC5314 This entity is chimeric	Mutation(s): 0  Gene Names: env, FEX1, CAALFM_C700270WA, CaO19.7095, orf19.7095
UniProt
Find proteins for P05877 (Human immunodeficiency virus type 1 group M subtype B (isolate MN)) Explore P05877  Go to UniProtKB:  P05877
Find proteins for Q5AFH3 (Candida albicans (strain SC5314 / ATCC MYA-2876)) Explore Q5AFH3  Go to UniProtKB:  Q5AFH3
UniProt Groups	P05877Q5AFH3

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.56 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.21_5207
RECONSTRUCTION	cryoSPARC	4.6.2

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-08-19 
Deposition Author(s): Kang, C.-Y., Stockbridge, R.B.

---

Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	GM128768

Revision History  

• Version 1.0: 2026-08-19
  Type: Initial release