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XPA

Synonyms
XP1, XPAC
External resources
Summary
This gene encodes a zinc finger protein plays a central role in nucleotide excision repair (NER), a specialized type of DNA repair. NER is responsible for repair of UV radiation-induced photoproducts and DNA adducts induced by chemical carcinogens and chemotherapeutic drugs. The encoded protein interacts with DNA and several NER proteins, acting as a scaffold to assemble the NER incision complex at sites of DNA damage. Mutations in this gene cause Xeroderma pigmentosum complementation group A (XP-A), an autosomal recessive skin disorder featuring hypersensitivity to sunlight and increased risk for skin cancer.

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
37
Likely pathogenic
1
VUS
1,178
Likely benign
607
Benign
0

Patient phenotypes

Proportions of phenotypes among 35 patients carrying pathogenic or likely pathogenic variants on XPA gene are displayed below.

Phenotype class
Patients in 3billion (%)
Abnormality of the musculoskeletal system
28.6%
Abnormality of the nervous system
22.9%
Abnormality of the cardiovascular system
20%
Abnormality of the eye
20%
Abnormality of head or neck
17.1%
Abnormality of the integument
14.3%
Abnormality of the immune system
11.4%
Abnormality of the ear
8.6%
Growth abnormality
8.6%
Abnormality of the genitourinary system
5.7%
Abnormality of the digestive system
2.9%
Abnormality of the respiratory system
2.9%
Neoplasm
2.9%
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 endocrine system
0%
Abnormality of the thoracic cavity
0%
Abnormality of the voice
0%
Constitutional symptom
0%

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