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SCNN1B

Chr 16p12.2

sodium channel epithelial 1 subunit beta

Aliases:
ENaCbeta
MANE:
ENST00000343070.7

Annotations refreshed 1 month ago.

Predicted protein structure

Clinical relevance (Genomics England PanelApp)

Diagnostic Grade (Green)

  • Extreme early-onset hypertension

    BOTH monoallelic and biallelic, autosomal or pseudoautosomal
  • Non-CF bronchiectasis

    BOTH monoallelic and biallelic, autosomal or pseudoautosomal
  • Renal tubulopathies

    BOTH monoallelic and biallelic, autosomal or pseudoautosomal
  • Respiratory ciliopathies including non-CF bronchiectasis

    BOTH monoallelic and biallelic, autosomal or pseudoautosomal
  • Fetal anomalies

    BIALLELIC, autosomal or pseudoautosomal
  • Familial pulmonary fibrosis

  • Primary ciliary disorders

  • Rare multisystem ciliopathy disorders

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Disease associations (Open Targets)

  • bronchiectasis with or without elevated sweat chloride 1

    0.77
  • Liddle syndrome 1

    0.76
  • pseudohypoaldosteronism, type IB2, autosomal recessive

    0.68
  • pseudohypoaldosteronism, type IB1, autosomal recessive

    0.66
  • Generalized pseudohypoaldosteronism type 1

    0.63
  • hypertensive disorder

    0.61
  • Liddle syndrome

    0.61
  • idiopathic bronchiectasis

    0.60
  • congestive heart failure

    0.58
  • cardiac arrhythmia

    0.56

Score is the Open Targets composite evidence score (0-1). Higher = stronger gene-disease association.

Protein function (UniProt)

Epithelial sodium channel subunit beta

This is one of the three pore-forming subunits of the heterotrimeric epithelial sodium channel (ENaC), a critical regulator of sodium balance and fluid homeostasis (PubMed:30251954, PubMed:32729833, PubMed:7762608, PubMed:9792722). ENaC operates in epithelial tissues, where it mediates the electrodiffusion of sodium ions from extracellular fluid through the apical membrane of cells, with water following osmotically (PubMed:24124190). It plays a key role in maintaining sodium homeostasis through electrogenic sodium reabsorption in the kidneys (PubMed:12107247). Additionally, ENaC is essential for airway surface liquid homeostasis, which is crucial for proper mucus clearance (PubMed:24124190)

Curated MONDO disease pages that list SCNN1B among their top associated genes.

Data sources: HGNC (CC BY 4.0), AlphaFold (CC BY 4.0, Jumper et al. Nature 2021), Genomics England PanelApp (CC BY 4.0), ClinGen, Open Targets (CC0), UniProt.

Not for sole clinical decision-making. Always verify against primary sources.