Home > Gene Browser > ADD3

ADD3

Synonyms
ADDL, CPSQ3
External resources
Summary
Adducins are heteromeric proteins composed of different subunits referred to as adducin alpha, beta and gamma. The three subunits are encoded by distinct genes and belong to a family of membrane skeletal proteins involved in the assembly of spectrin-actin network in erythrocytes and at sites of cell-cell contact in epithelial tissues. While adducins alpha and gamma are ubiquitously expressed, the expression of adducin beta is restricted to brain and hematopoietic tissues. Adducin, originally purified from human erythrocytes, was found to be a heterodimer of adducins alpha and beta. Polymorphisms resulting in amino acid substitutions in these two subunits have been associated with the regulation of blood pressure in an animal model of hypertension. Heterodimers consisting of alpha and gamma subunits have also been described. Structurally, each subunit is comprised of two distinct domains. The amino-terminal region is protease resistant and globular in shape, while the carboxy-terminal region is protease sensitive. The latter contains multiple phosphorylation sites for protein kinase C, the binding site for calmodulin, and is required for association with spectrin and actin. Alternatively spliced adducin gamma transcripts encoding different isoforms have been described. The functions of the different isoforms are not known.

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
4
Likely pathogenic
0
VUS
1,173
Likely benign
650
Benign
23

Patient Phenotypes

Proportions of phenotypes among 4 patients carrying pathogenic or likely pathogenic variants on ADD3 gene are displayed below. The following symptoms were found in patients with a variant in ADD3. However, patients may have been diagnosed with a different variant.

Phenotype class
Patients in 3billion (%)
Abnormality of the nervous system
100%
Abnormality of head or neck
75%
Abnormality of the eye
50%
Abnormality of the integument
50%
Abnormality of the musculoskeletal system
50%
Growth abnormality
50%
Abnormality of the cardiovascular system
25%
Abnormality of the ear
25%
Abnormality of the immune system
25%
Abnormal cellular phenotype
0%
Abnormality of blood and blood forming tissues
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 endocrine system
0%
Abnormality of the genitourinary system
0%
Abnormality of the respiratory system
0%
Abnormality of the thoracic cavity
0%
Abnormality of the voice
0%
Constitutional symptom
0%
Neoplasm
0%

Have a question or need assistance? Ask here.

Send us your questions or comments related to the variant counts and/or patient phenotypes.