8X1Q | pdb_00008x1q

Cryo-EM structure of human DRA (SLC26A3) bound with bicarbonate

• PDB DOI: https://doi.org/10.2210/pdb8X1Q/pdb
• EM Map EMD-37998: EMDB EMDataResource

• Classification: TRANSPORT PROTEIN
• Organism(s): Homo sapiens
• Expression System: Homo sapiens
• Mutation(s): No 
• Membrane Protein: Yes  MemProtMD


• Deposited: 2023-11-08 Released: 2025-05-14 
• Deposition Author(s): Yang, X., Zhang, Y.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 2.29 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Cryo-EM structure of human DRA (SLC26A3) bound with bicarbonate

Yang, X., Zhang, Y.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 171.88 kDa 
• Atom Count: 10,875 
• Modeled Residue Count: 1,404 
• Deposited Residue Count: 1,550 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Chloride anion exchanger	A, B	775	Homo sapiens	Mutation(s): 0  Gene Names: SLC26A3 Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for P40879 (Homo sapiens) Explore P40879  Go to UniProtKB:  P40879
PHAROS:  P40879 GTEx:  ENSG00000091138

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
BCT (Subject of Investigation/LOI)	C [auth A], D [auth B]	BICARBONATE ION C H O3 BVKZGUZCCUSVTD-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 2.29 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-05-14 
Deposition Author(s): Yang, X., Zhang, Y.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	--

Revision History  

• Version 1.0: 2025-05-14
  Type: Initial release