6WTH

Full-length human ENaC ECD


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.06 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 principles of assembly, activation, and inhibition in epithelial sodium channel.

Noreng, S.Posert, R.Bharadwaj, A.Houser, A.Baconguis, I.

(2020) Elife 9

  • DOI: https://doi.org/10.7554/eLife.59038
  • Primary Citation of Related Structures:  
    6WTH

  • PubMed Abstract: 

    The molecular bases of heteromeric assembly and link between Na + self-inhibition and protease-sensitivity in epithelial sodium channels (ENaCs) are not fully understood. Previously, we demonstrated that ENaC subunits - α, β, and γ - assemble in a counterclockwise configuration when viewed from outside the cell with the protease-sensitive GRIP domains in the periphery (Noreng et al., 2018). Here we describe the structure of ENaC resolved by cryo-electron microscopy at 3 Å. We find that a combination of precise domain arrangement and complementary hydrogen bonding network defines the subunit arrangement. Furthermore, we determined that the α subunit has a primary functional module consisting of the finger and GRIP domains. The module is bifurcated by the α2 helix dividing two distinct regulatory sites: Na + and the inhibitory peptide. Removal of the inhibitory peptide perturbs the Na + site via the α2 helix highlighting the critical role of the α2 helix in regulating ENaC function.


  • Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Oregon Health & Science University, Portland, United States.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Amiloride-sensitive sodium channel subunit alpha669Homo sapiensMutation(s): 0 
Gene Names: SCNN1ASCNN1
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P37088 (Homo sapiens)
Explore P37088 
Go to UniProtKB:  P37088
PHAROS:  P37088
GTEx:  ENSG00000111319 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP37088
Glycosylation
Glycosylation Sites: 2Go to GlyGen: P37088-1
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Amiloride-sensitive sodium channel subunit beta640Homo sapiensMutation(s): 0 
Gene Names: SCNN1B
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P51168 (Homo sapiens)
Explore P51168 
Go to UniProtKB:  P51168
PHAROS:  P51168
GTEx:  ENSG00000168447 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP51168
Glycosylation
Glycosylation Sites: 4Go to GlyGen: P51168-1
Sequence Annotations
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Amiloride-sensitive sodium channel subunit gamma649Homo sapiensMutation(s): 0 
Gene Names: SCNN1G
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P51170 (Homo sapiens)
Explore P51170 
Go to UniProtKB:  P51170
PHAROS:  P51170
GTEx:  ENSG00000166828 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP51170
Glycosylation
Glycosylation Sites: 1Go to GlyGen: P51170-1
Sequence Annotations
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  • Reference Sequence
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
7B1 Fab
D, E
118Mus musculusMutation(s): 0 
Sequence Annotations
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  • Reference Sequence
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
10D4 Fab
F, G
115Mus musculusMutation(s): 0 
Sequence Annotations
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 6
MoleculeChains Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
H, I, J
2N-Glycosylation
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.06 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/Office of the DirectorUnited StatesDP5OD017871
American Heart AssociationUnited States19TPA34760754
American Heart AssociationUnited States18PRE33990205
National Science Foundation (NSF, United States)United StatesDGE-1937961

Revision History  (Full details and data files)

  • Version 1.0: 2020-08-12
    Type: Initial release