9BLR

Human SCNN1D-SCNN1B-SCNN1G ENaC trimer

• PDB DOI: https://doi.org/10.2210/pdb9BLR/pdb
• EM Map EMD-44674: EMDB EMDataResource

• Classification: MEMBRANE PROTEIN
• Organism(s): Homo sapiens
• Expression System: Homo sapiens
• Mutation(s): Yes 


• Deposited: 2024-05-01 Released: 2024-11-27 
• Deposition Author(s): Houser, A., Baconguis, I.
• Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS), Cystic Fibrosis Foundation, National Science Foundation (NSF, United States)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.38 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Starting Model: experimental

Literature

Structural Insights into Subunit-Dependent Functional Regulation in Epithelial Sodium Channels

Houser, A., Baconguis, I.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1B1C1 Pseudo Symmetry: Cyclic - C3  (Explore in 3D)
Pseudo Stoichiometry: Homo 3-mer - A3 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 220.68 kDa 
• Atom Count: 9,426 
• Modelled Residue Count: 1,148 
• Deposited Residue Count: 1,927 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Isoform 1 of Amiloride-sensitive sodium channel subunit delta	A	638	Homo sapiens	Mutation(s): 1  Gene Names: SCNN1D, DNACH
UniProt & NIH Common Fund Data Resources
Find proteins for P51172 (Homo sapiens) Explore P51172  Go to UniProtKB:  P51172
PHAROS:  P51172 GTEx:  ENSG00000162572
Glycosylation
Glycosylation Sites: 1		Go to GlyGen: P51172-3

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Amiloride-sensitive sodium channel subunit beta	B	640	Homo sapiens	Mutation(s): 1  Gene Names: SCNN1B
UniProt & NIH Common Fund Data Resources
Find proteins for P51168 (Homo sapiens) Explore P51168  Go to UniProtKB:  P51168
PHAROS:  P51168 GTEx:  ENSG00000168447
Glycosylation
Glycosylation Sites: 4		Go to GlyGen: P51168-1

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Amiloride-sensitive sodium channel subunit gamma	C	649	Homo sapiens	Mutation(s): 3  Gene Names: SCNN1G
UniProt & NIH Common Fund Data Resources
Find proteins for P51170 (Homo sapiens) Explore P51170  Go to UniProtKB:  P51170
PHAROS:  P51170 GTEx:  ENSG00000166828
Glycosylation
Glycosylation Sites: 2		Go to GlyGen: P51170-1

Oligosaccharides

Help

Entity ID: 4
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	D [auth E], F [auth D], G [auth I]	3		N-Glycosylation

Entity ID: 5
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	E [auth G]	2		N/A

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAG	H [auth A], I [auth B], J [auth B], K [auth B], L [auth C], M [auth C]	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.38 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
RECONSTRUCTION	cryoSPARC	4.3.1
MODEL REFINEMENT	ISOLDE	1.6
MODEL REFINEMENT	PHENIX	1.2

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2024-11-27 
Deposition Author(s): Houser, A., Baconguis, I.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	1R01GM138862
Cystic Fibrosis Foundation	United States	BACONG22G0
National Science Foundation (NSF, United States)	United States	GVPRS0015B4

Revision History  

• Version 1.0: 2024-11-27
  Type: Initial release