ClinVar Miner

Submissions for variant NM_000136.3(FANCC):c.802T>A (p.Cys268Ser)

gnomAD frequency: 0.00001  dbSNP: rs730881718
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Total submissions: 4
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
GeneDx RCV000160480 SCV000211045 uncertain significance not provided 2018-05-17 criteria provided, single submitter clinical testing This variant is denoted FANCC c.802T>A at the cDNA level, p.Cys268Ser (C268S) at the protein level, and results in the change of a Cysteine to a Serine (TGT>AGT). This variant has not, to our knowledge, been published in the literature as pathogenic or benign. FANCC Cys268Ser was not observed at a significant allele frequency in large population cohorts (Lek 2016). This variant is located in the region of interaction with Hsp70 and GRP94 (Gordon 2000). In silico analysis, which includes protein predictors and evolutionary conservation, supports that this variant does not alter protein structure/function. Based on currently available evidence, it is unclear whether FANCC Cys268Ser is a pathogenic or benign variant. We consider it to be a variant of uncertain significance.
Invitae RCV000459016 SCV000549960 uncertain significance Fanconi anemia 2022-01-13 criteria provided, single submitter clinical testing This sequence change replaces cysteine, which is neutral and slightly polar, with serine, which is neutral and polar, at codon 268 of the FANCC protein (p.Cys268Ser). This variant is present in population databases (rs730881718, gnomAD 0.002%). This variant has not been reported in the literature in individuals affected with FANCC-related conditions. ClinVar contains an entry for this variant (Variation ID: 182479). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The serine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance.
Ambry Genetics RCV001027088 SCV001189590 uncertain significance Hereditary cancer-predisposing syndrome 2022-09-21 criteria provided, single submitter clinical testing The p.C268S variant (also known as c.802T>A), located in coding exon 7 of the FANCC gene, results from a T to A substitution at nucleotide position 802. The cysteine at codon 268 is replaced by serine, an amino acid with dissimilar properties. This amino acid position is not well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.
Natera, Inc. RCV001274477 SCV001458700 uncertain significance Fanconi anemia complementation group C 2020-09-16 no assertion criteria provided clinical testing

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