9PIG | pdb_00009pig

Cryo-EM structure of human NCC with indapamide

PDB DOI: https://doi.org/10.2210/pdb9PIG/pdb
EM Map EMD-71666: EMDB EMDataResource

Classification: MEMBRANE PROTEIN
Organism(s): Homo sapiens, Danio rerio
Expression System: Homo sapiens
Mutation(s): Yes

Deposited: 2025-07-10 Released: 2026-06-03
Deposition Author(s): Zhang, J., Feng, L.
Funding Organization(s): The G. Harold and Leila Y. Mathers Foundation, National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

Experimental Data Snapshot

Method: ELECTRON MICROSCOPY
Resolution: 2.79 Å
Aggregation State: PARTICLE
Reconstruction Method: SINGLE PARTICLE

wwPDB Validation 3D Report Full Report

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

Literature

Molecular mechanisms of thiazide-like diuretics-mediated inhibition of the human Na-Cl cotransporter.

Lee, C.L., Zhang, J., Feng, L.

(2025) Nat Commun 16: 7740-7740

PubMed: 40830368 Search on PubMed Search on PubMed Central
DOI: https://doi.org/10.1038/s41467-025-62714-w
Primary Citation Related Structures:
9PIE, 9PIF, 9PIG

PubMed Abstract:
Thiazide-type and thiazide-like diuretics are structurally distinct first-line antihypertensive drugs that target the sodium-chloride cotransporter (NCC) in the kidney. Thiazide-like diuretics are reported to have better cardioprotective effects than thiazide-type diuretics, but whether this is due to differences in NCC-inhibition mechanisms, if there is any, remains unclear. To understand the molecular mechanisms of NCC inhibition by thiazide-like diuretics, we determine the structures of human NCC (hNCC) bound to two of the most widely used thiazide-like diuretics, chlorthalidone and indapamide, using cryogenic electron microscopy (cryo-EM). Structural analyses reveal shared features and distinctions between NCC-inhibition by thiazide-like and thiazide-type diuretics. Furthermore, structural comparisons allow us to identify polymorphisms in hNCC that have substantial differential effects on the potencies of specific thiazide-like and thiazide-type diuretics. Our work provides important insights into the molecular pharmacology of NCC and a blueprint for developing precision medicine to manage hypertension with thiazide-like and thiazide-type diuretics.

Organizational Affiliation

Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA, USA.

Macromolecule Content

Total Structure Weight: 243.02 kDa
Atom Count: 14,034
Modeled Residue Count: 1,770
Deposited Residue Count: 2,184
Unique protein chains: 2

Macromolecules

Find similar proteins by:

| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Solute carrier family 12 member 3	A, C [auth B]	890	Homo sapiens	Mutation(s): 1 Gene Names: SLC12A3, NCC, TSC
UniProt & NIH Common Fund Data Resources
Find proteins for P55017 (Homo sapiens) Explore P55017 Go to UniProtKB: P55017
PHAROS: P55017 GTEx: ENSG00000070915
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P55017
Glycosylation
Glycosylation Sites: 1	Glycosylation Focus chain A Focus chain C [auth B]	Go to GlyGen: P55017-1
Sequence Annotations Expand
Reference Sequence

Find similar proteins by:

| 3D Structure

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Solute carrier family 12 member 2	B [auth D], D [auth C]	202	Danio rerio	Mutation(s): 0 Gene Names: slc12a2, nkcc1
UniProt
Find proteins for A0A0G2KTI4 (Danio rerio) Explore A0A0G2KTI4 Go to UniProtKB: A0A0G2KTI4
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	A0A0G2KTI4
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 4 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
ATP (Subject of Investigation/LOI) Query on ATP Download:Ideal Coordinates CCD File SDF format, chain H [auth A] SDF format, chain L [auth B] MOL2 format, chain H [auth A] MOL2 format, chain L [auth B] mmCIF format, chain H [auth A] mmCIF format, chain L [auth B]	H [auth A], L [auth B]	ADENOSINE-5'-TRIPHOSPHATE C₁₀ H₁₆ N₅ O₁₃ P₃ ZKHQWZAMYRWXGA-KQYNXXCUSA-N		Interactions Focus chain H [auth A] Focus chain L [auth B] Interactions & Density Focus chain H [auth A] Focus chain L [auth B]
BL1 (Subject of Investigation/LOI) Query on BL1 Download:Ideal Coordinates CCD File SDF format, chain G [auth A] SDF format, chain K [auth B] MOL2 format, chain G [auth A] MOL2 format, chain K [auth B] mmCIF format, chain G [auth A] mmCIF format, chain K [auth B]	G [auth A], K [auth B]	4-chloro-N-[(2S)-2-methyl-2,3-dihydro-1H-indol-1-yl]-3-sulfamoylbenzamide C₁₆ H₁₆ Cl N₃ O₃ S NDDAHWYSQHTHNT-JTQLQIEISA-N		Interactions Focus chain G [auth A] Focus chain K [auth B] Interactions & Density Focus chain G [auth A] Focus chain K [auth B]
NAG (Subject of Investigation/LOI) Query on NAG Download:Ideal Coordinates CCD File SDF format, chain F [auth A] SDF format, chain J [auth B] MOL2 format, chain F [auth A] MOL2 format, chain J [auth B] mmCIF format, chain F [auth A] mmCIF format, chain J [auth B]	F [auth A], J [auth B]	2-acetamido-2-deoxy-beta-D-glucopyranose C₈ H₁₅ N O₆ OVRNDRQMDRJTHS-FMDGEEDCSA-N		Interactions Focus chain F [auth A] Focus chain J [auth B] Interactions & Density Focus chain F [auth A] Focus chain J [auth B]
NA (Subject of Investigation/LOI) Query on NA Download:Ideal Coordinates CCD File SDF format, chain E [auth A] SDF format, chain I [auth B] MOL2 format, chain E [auth A] MOL2 format, chain I [auth B] mmCIF format, chain E [auth A] mmCIF format, chain I [auth B]	E [auth A], I [auth B]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N		Interactions Focus chain E [auth A] Focus chain I [auth B] Interactions & Density Focus chain E [auth A] Focus chain I [auth B]

Experimental Data & Validation

Experimental Data

Method: ELECTRON MICROSCOPY
Resolution: 2.79 Å
Aggregation State: PARTICLE
Reconstruction Method: SINGLE PARTICLE

EM Software:

Task	Software Package	Version
RECONSTRUCTION	cryoSPARC

Structure Validation

View Full Validation Report

View more in-depth experimental data

Entry History

& Funding Information

Deposition Data

Released Date: 2026-06-03

Deposition Author(s):

Zhang, J.

Feng, L.

Funding Organization	Location	Grant Number
The G. Harold and Leila Y. Mathers Foundation	United States	--
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	--