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SDHD

Synonyms
CBT1, CII-4, CWS3, MC2DN3, PGL, PGL1, QPs3, SDH4, cybS
External resources
Summary
This gene encodes a member of complex II of the respiratory chain, which is responsible for the oxidation of succinate. The encoded protein is one of two integral membrane proteins anchoring the complex to the matrix side of the mitochondrial inner membrane. Mutations in this gene are associated with the formation of tumors, including hereditary paraganglioma. Transmission of disease occurs almost exclusively through the paternal allele, suggesting that this locus may be maternally imprinted. There are pseudogenes for this gene on chromosomes 1, 2, 3, 7, and 18. Alternative splicing results in multiple transcript variants.

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
2
Likely pathogenic
5
VUS
1,390
Likely benign
1,168
Benign
249

Patient phenotypes

Proportions of phenotypes among 7 patients carrying pathogenic or likely pathogenic variants on SDHD gene are displayed below.

Phenotype class
Patients in 3billion (%)
Abnormality of the endocrine system
85.7%
Abnormality of the nervous system
85.7%
Neoplasm
85.7%
Abnormality of the cardiovascular system
14.3%
Abnormal cellular phenotype
0%
Abnormality of blood and blood-forming tissues
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 eye
0%
Abnormality of the genitourinary system
0%
Abnormality of the immune system
0%
Abnormality of the integument
0%
Abnormality of the musculoskeletal system
0%
Abnormality of the respiratory system
0%
Abnormality of the thoracic cavity
0%
Abnormality of the voice
0%
Constitutional symptom
0%
Growth abnormality
0%

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