Home > Gene Browser > SPTBN2

SPTBN2

Synonyms
GTRAP41, SCA5, SCAR14
External resources
Summary
Spectrins are principle components of a cell's membrane-cytoskeleton and are composed of two alpha and two beta spectrin subunits. The protein encoded by this gene (SPTBN2), is called spectrin beta non-erythrocytic 2 or beta-III spectrin. It is related to, but distinct from, the beta-II spectrin gene which is also known as spectrin beta non-erythrocytic 1 (SPTBN1). SPTBN2 regulates the glutamate signaling pathway by stabilizing the glutamate transporter EAAT4 at the surface of the plasma membrane. Mutations in this gene cause a form of spinocerebellar ataxia, SCA5, that is characterized by neurodegeneration, progressive locomotor incoordination, dysarthria, and uncoordinated eye movements.

Variant counts

The variants found in rare patients tested by 3billion are classified and counted according to ACMG guidelines. The variants with over 5% variant frequency in population genome databases ( gnomAD, dbSNP, etc) are excluded.

Pathogenic
6
Likely pathogenic
0
VUS
16,557
Likely benign
5,221
Benign
0

Patient phenotypes

Proportions of phenotypes among 6 patients carrying pathogenic or likely pathogenic variants on SPTBN2 gene are displayed below.

Phenotype class
Patients in 3billion (%)
Abnormality of the nervous system
50%
Abnormality of head or neck
33.3%
Abnormality of the eye
33.3%
Abnormality of the musculoskeletal system
33.3%
Growth abnormality
33.3%
Abnormality of limbs
16.7%
Abnormality of the cardiovascular system
16.7%
Abnormal cellular phenotype
0%
Abnormality of blood and blood-forming tissues
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 genitourinary system
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%
Neoplasm
0%

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