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AFP

Synonyms
AFPD, FETA, HPAFP
External resources
Summary
This gene encodes alpha-fetoprotein, a major plasma protein produced by the yolk sac and the liver during fetal life. Alpha-fetoprotein expression in adults is often associated with hepatocarcinoma and with teratoma, and has prognostic value for managing advanced gastric cancer. However, hereditary persistance of alpha-fetoprotein may also be found in individuals with no obvious pathology. The protein is thought to be the fetal counterpart of serum albumin, and the alpha-fetoprotein and albumin genes are present in tandem in the same transcriptional orientation on chromosome 4. Alpha-fetoprotein is found in monomeric as well as dimeric and trimeric forms, and binds copper, nickel, fatty acids and bilirubin. The level of alpha-fetoprotein in amniotic fluid is used to measure renal loss of protein to screen for spina bifida and anencephaly.

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
6
Likely pathogenic
0
VUS
1,162
Likely benign
500
Benign
809

Patient phenotypes

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

Phenotype class
Patients in 3billion (%)
Abnormality of the eye
66.7%
Abnormality of limbs
16.7%
Abnormality of the ear
16.7%
Abnormality of the genitourinary system
16.7%
Abnormality of the integument
16.7%
Abnormality of the musculoskeletal system
16.7%
Growth abnormality
16.7%
Abnormal cellular phenotype
0%
Abnormality of blood and blood-forming tissues
0%
Abnormality of head or neck
0%
Abnormality of metabolism homeostasis
0%
Abnormality of prenatal development or birth
0%
Abnormality of the breast
0%
Abnormality of the cardiovascular system
0%
Abnormality of the digestive system
0%
Abnormality of the endocrine system
0%
Abnormality of the immune system
0%
Abnormality of the nervous system
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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