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KCNE1

Chr 21q22.12

potassium voltage-gated channel subfamily E regulatory subunit 1

Aliases:
minK, IsK, JLNS2, LQT5
MANE:
ENST00000399286.3

Annotations refreshed 10 hours ago.

Predicted protein structure

Clinical relevance (Genomics England PanelApp)

Diagnostic Grade (Green)

  • DDG2P

    BIALLELIC, autosomal or pseudoautosomal
  • Long QT syndrome

    BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal
  • Monogenic hearing loss

    BIALLELIC, autosomal or pseudoautosomal
  • Catecholaminergic polymorphic VT

    BOTH monoallelic and biallelic, autosomal or pseudoautosomal
  • Familial Meniere Disease

  • Fetal anomalies

    BIALLELIC, autosomal or pseudoautosomal
  • Intellectual disability

    BOTH monoallelic and biallelic, autosomal or pseudoautosomal
  • Short QT syndrome

    BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal

Disease associations (Open Targets)

  • long QT syndrome 5

    0.80
  • Jervell and Lange-Nielsen syndrome 2

    0.77
  • Jervell and Lange-Nielsen syndrome

    0.66
  • familial long QT syndrome

    0.63
  • Romano-Ward syndrome

    0.59
  • Prolonged QT interval

    0.57
  • Abnormality of the cardiovascular system

    0.52
  • Jervell and Lange-Nielsen syndrome 1

    0.42
  • Sensorineural hearing impairment

    0.34
  • autoimmune disorder of central nervous system

    0.33

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

Protein function (UniProt)

Potassium voltage-gated channel subfamily E member 1

Ancillary protein that functions as a regulatory subunit of the voltage-gated potassium (Kv) channel complex composed of pore-forming and potassium-conducting alpha subunits and of regulatory beta subunits. KCNE1 beta subunit modulates the gating kinetics and enhances stability of the channel complex (PubMed:19219384, PubMed:20533308, PubMed:9230439). Alters the gating of the delayed rectifier Kv channel containing KCNB1 alpha subunit (PubMed:19219384). Associates with KCNQ1/KVLQT1 alpha subunit to form the slowly activating delayed rectifier cardiac potassium (IKs) channel responsible for ventricular muscle action potential repolarization (PubMed:20533308). The outward current reaches its steady state only after 50 seconds (Probable). Assembly with KCNH2/HERG alpha subunit Kv channel may regulate the rapidly activating component of the delayed rectifying potassium current (IKr) in heart (PubMed:9230439)

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.