ClinGen Dosage Sensitivity Curation Page


Curation Status: Complete

Gene Information

Location Information

Evidence for Loss Phenotypes

Evidence for loss of function phenotype
PubMed ID Description
21398687 Gardie et al. (2011) identified 32 different heterozygous germline mutations (15 missense, 6 frameshifts, 4 nonsense, 1 deletion/insertion, 5 splicing site and 1 complete deletion). 40 of the 56 families with proven Hereditary Leiomyomatosis and Renal Cell Cancer. Lymphoblstoid cell lines were generated by Epstein-Barr virus transformation of leucocytes. FH enzyme activity was measured spectrophotometrically. A reduction of at least 50% of the enzymatic activity was observed for all mutations tested. A difference of enzyme activities between missense mutations and loss of function mutations (deletions, nonsense mutations, splice site mutations) was NOT observed.

Evidence for Triplosenstive Phenotype

Evidence for triplosensitivity phenotype
PubMed ID Description

NOTE:The loss of function score should be used to evaluate deletions, and the triplosensitivity score should be used to evaluated duplications. CNVs encompassing more than one gene must be evaluated in their totality (e.g. overall size, gain vs. loss, presence of other genes, etc). The rating of a single gene within the CNV should not necessarily be the only criteria by which one defines a clinical interpretation. Individual interpretations must take into account the phenotype described for the patient as well as issues of penetrance and expressivity of the disorder. ACMG has published guidelines for the characterization of postnatal CNVs, and these recommendations should be utilized (Genet Med (2011)13: 680-685). Exceptions to these interpretive correlations will occur, and clinical judgment should always be exercised.