ClinVar Miner

Submissions for variant NM_007294.4(BRCA1):c.4697C>G (p.Ser1566Cys)

dbSNP: rs1060502325
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV000685172 SCV000812645 uncertain significance Hereditary breast ovarian cancer syndrome 2023-01-30 criteria provided, single submitter clinical testing ClinVar contains an entry for this variant (Variation ID: 565578). This variant has not been reported in the literature in individuals affected with BRCA1-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces serine, which is neutral and polar, with cysteine, which is neutral and slightly polar, at codon 1566 of the BRCA1 protein (p.Ser1566Cys). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on BRCA1 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 RCV002331320 SCV002633916 uncertain significance Hereditary cancer-predisposing syndrome 2016-01-03 criteria provided, single submitter clinical testing The p.S1566C variant (also known as c.4697C>G), located in coding exon 14 of the BRCA1 gene, results from a C to G substitution at nucleotide position 4697. The serine at codon 1566 is replaced by cysteine, an amino acid with dissimilar properties. This variant was not reported in population based cohorts in the following databases: Database of Single Nucleotide Polymorphisms (dbSNP), NHLBI Exome Sequencing Project (ESP), and 1000 Genomes Project. In the ESP, this variant was not observed in 6503 samples (13006 alleles) with coverage at this position. To date, this alteration has been detected with an allele frequency of approximately 0.0004% (greater than 225000 alleles tested) in our clinical cohort. This amino acid position is highly conserved on limited sequence alignment. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of p.S1566 remains unclear.

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