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GRIN1

Chr 9q34.3

glutamate ionotropic receptor NMDA type subunit 1

Aliases:
GluN1, NR1
MANE:
ENST00000371561.8

Annotations refreshed 10 hours ago.

Predicted protein structure

Clinical relevance (Genomics England PanelApp)

Diagnostic Grade (Green)

  • Childhood onset dystonia, chorea or related movement disorder

    BOTH monoallelic and biallelic, autosomal or pseudoautosomal
  • DDG2P

    BOTH monoallelic and biallelic, autosomal or pseudoautosomal
  • Early onset or syndromic epilepsy

    BOTH monoallelic and biallelic, autosomal or pseudoautosomal
  • Fetal anomalies

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

    BOTH monoallelic and biallelic, autosomal or pseudoautosomal
  • Malformations of cortical development

    MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted

Disease associations (Open Targets)

  • neurodevelopmental disorder with or without hyperkinetic movements and seizures, autosomal dominant

    0.85
  • neurodevelopmental disorder with or without hyperkinetic movements and seizures, autosomal recessive

    0.74
  • Alzheimer disease

    0.70
  • Parkinson disease

    0.69
  • developmental and epileptic encephalopathy 101

    0.64
  • infection

    0.60
  • influenza

    0.60
  • depressive disorder

    0.60
  • major depressive disorder

    0.59
  • alcohol dependence

    0.58

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

Protein function (UniProt)

Glutamate receptor ionotropic, NMDA 1

Component of N-methyl-D-aspartate (NMDA) receptors (NMDARs) that function as heterotetrameric, ligand-gated cation channels with high calcium permeability and voltage-dependent block by Mg(2+) (PubMed:21376300, PubMed:26875626, PubMed:26919761, PubMed:28126851, PubMed:28228639, PubMed:36959261, PubMed:7679115, PubMed:7681588, PubMed:7685113). NMDARs participate in synaptic plasticity for learning and memory formation by contributing to the long-term potentiation (LTP) (PubMed:26875626). Channel activation requires binding of the neurotransmitter L-glutamate to the GluN2 subunit, glycine or D-serine binding to the GluN1 subunit, plus membrane depolarization to eliminate channel inhibition by Mg(2+) (PubMed:21376300, PubMed:26875626, PubMed:26919761, PubMed:27164704, PubMed:28095420, PubMed:28105280, PubMed:28126851, PubMed:28228639, PubMed:36959261, PubMed:38538865, PubMed:7679115, PubMed:7681588, PubMed:7685113). NMDARs mediate simultaneously the potassium efflux and the influx of calcium and sodium (By similarity). Each GluN2 or GluN3 subunit confers differential attributes to channel properties, including activation, deactivation and desensitization kinetics, pH sensitivity, Ca2(+) permeability, and binding to allosteric modulators (PubMed:26875626, PubMed:26919761, PubMed:36309015, PubMed:38598639)

Curated MONDO disease pages that list GRIN1 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.