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GRID2

Synonyms
GluD2, SCAR18
External resources
Summary
The protein encoded by this gene is a member of the family of ionotropic glutamate receptors which are the predominant excitatory neurotransmitter receptors in the mammalian brain. The encoded protein is a multi-pass membrane protein that is expressed selectively in cerebellar Purkinje cells. A point mutation in the mouse ortholog, associated with the phenotype named 'lurcher', in the heterozygous state leads to ataxia resulting from selective, cell-autonomous apoptosis of cerebellar Purkinje cells during postnatal development. Mice homozygous for this mutation die shortly after birth from massive loss of mid- and hindbrain neurons during late embryogenesis. This protein also plays a role in synapse organization between parallel fibers and Purkinje cells. Alternate splicing results in multiple transcript variants encoding distinct isoforms. Mutations in this gene cause cerebellar ataxia in humans.

Variant Counts

Variant classification counts, according to ACMG guideline on all identified variants among our tested samples, are listed. The variants with over 5% variant frequency in population genome databases ( gnomAD, dbSNP, etc.) are excluded.

Pathogenic
3
Likely pathogenic
0
VUS
7,029
Likely benign
2,219
Benign
340

Patient Phenotypes

Proportions of phenotypes among 3 patients carrying pathogenic or likely pathogenic variants on GRID2 gene are displayed below. The following symptoms were found in patients with a variant in GRID2. However, patients may have been diagnosed with a different variant.

Phenotype class
Patients in 3billion (%)
Abnormality of blood and blood forming tissues
33.3%
Abnormality of the cardiovascular system
33.3%
Abnormality of the genitourinary system
33.3%
Abnormality of the musculoskeletal system
33.3%
Abnormality of the nervous system
33.3%
Abnormal cellular phenotype
0%
Abnormality of head or neck
0%
Abnormality of limbs
0%
Abnormality of metabolism homeostasis
0%
Abnormality of prenatal development or birth
0%
Abnormality of the breast
0%
Abnormality of the digestive system
0%
Abnormality of the ear
0%
Abnormality of the endocrine system
0%
Abnormality of the eye
0%
Abnormality of the immune system
0%
Abnormality of the integument
0%
Abnormality of the respiratory system
0%
Abnormality of the thoracic cavity
0%
Abnormality of the voice
0%
Constitutional symptom
0%
Growth abnormality
0%
Neoplasm
0%

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