23XK | pdb_000023xk

Cryo-EM structure of human sodium/proton antiporter NHE1 in complex with Cariporide in an outward-open conformation

PDB DOI: https://doi.org/10.2210/pdb23XK/pdb
EM Map EMD-69358: EMDB EMDataResource

Classification: MEMBRANE PROTEIN
Organism(s): Homo sapiens
Expression System: Homo sapiens
Mutation(s): No

Deposited: 2026-02-24 Released: 2026-04-08
Deposition Author(s): Cong, Y., Kong, F., Zhu, A., Yan, C.
Funding Organization(s): National Natural Science Foundation of China (NSFC)

Experimental Data Snapshot

Method: ELECTRON MICROSCOPY
Resolution: 3.10 Å
Aggregation State: PARTICLE
Reconstruction Method: SINGLE PARTICLE

wwPDB Validation 3D Report Full Report

Validation slider image for 23XK

This is version 1.0 of the entry. See complete history.

Literature

Structure and transport mechanism of the human sodium/proton antiporter NHE1

Cong, Y., Kong, F., Zhu, A., Yan, C.

To be published.

Macromolecule Content

Total Structure Weight: 182.3 kDa
Atom Count: 6,632
Modeled Residue Count: 840
Deposited Residue Count: 1,630
Unique protein chains: 1

Macromolecules

Find similar proteins by:

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Sodium/hydrogen exchanger 1	A, B	815	Homo sapiens	Mutation(s): 0 Gene Names: SLC9A1, APNH1, NHE1
UniProt & NIH Common Fund Data Resources
Find proteins for P19634 (Homo sapiens) Explore P19634 Go to UniProtKB: P19634
PHAROS: P19634 GTEx: ENSG00000090020
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P19634
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
HG0 (Subject of Investigation/LOI) Query on HG0 Download:Ideal Coordinates CCD File SDF format, chain D [auth B] SDF format, chain C [auth A] MOL2 format, chain D [auth B] MOL2 format, chain C [auth A] mmCIF format, chain D [auth B] mmCIF format, chain C [auth A]	C [auth A], D [auth B]	N-[bis(azanyl)methylidene]-3-methylsulfonyl-4-propan-2-yl-benzamide C₁₂ H₁₇ N₃ O₃ S IWXNYAIICFKCTM-UHFFFAOYSA-N		Interactions Focus chain C [auth A] Focus chain D [auth B] Interactions & Density Focus chain C [auth A] Focus chain D [auth B]

Experimental Data & Validation

Experimental Data

Method: ELECTRON MICROSCOPY
Resolution: 3.10 Å
Aggregation State: PARTICLE
Reconstruction Method: SINGLE PARTICLE

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.18_3855
RECONSTRUCTION	cryoSPARC

Structure Validation

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View more in-depth experimental data

Entry History

& Funding Information

Deposition Data

Released Date: 2026-04-08

Deposition Author(s):

Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	32171204

Revision History (Full details and data files)

Version 1.0: 2026-04-08
Type: Initial release

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RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.