ClinVar Miner

Submissions for variant NM_000136.3(FANCC):c.816C>T (p.Ile272=) (rs55719336)

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Total submissions: 10
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
GeneDx RCV000124965 SCV000168405 benign not specified 2014-05-15 criteria provided, single submitter clinical testing This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease.
Invitae RCV000203994 SCV000261270 benign Fanconi anemia 2020-11-29 criteria provided, single submitter clinical testing
Illumina Clinical Services Laboratory,Illumina RCV001095299 SCV000481132 benign Fanconi anemia, complementation group C 2018-01-12 criteria provided, single submitter clinical testing This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease.
Genetic Services Laboratory, University of Chicago RCV000124965 SCV000594673 likely benign not specified 2016-05-27 criteria provided, single submitter clinical testing
Ambry Genetics RCV000563129 SCV000673310 likely benign Hereditary cancer-predisposing syndrome 2016-09-29 criteria provided, single submitter clinical testing Synonymous alterations with insufficient evidence to classify as benign
Women's Health and Genetics/Laboratory Corporation of America, LabCorp RCV000588252 SCV000695438 benign not provided 2016-04-29 criteria provided, single submitter clinical testing Variant summary: The FANCC c.816C>T (p.Ile272Ile) variant affects a non-conserved nucleotide, resulting in a synonymous mutation. Mutation taster predicts damaging outcome for this variant while 5/5 in silico tools via Alamut predict the variant not to have an impact on normal splicing. The variant was observed by the ExAC project in 159/121094 control chromosomes (1 homozygote) at a frequency of 0.001313, which does not exceed maximal expected frequency of a pathogenic allele (0.0017678). However, in the East Asian subcohort, the variant was observed at an allele frequency of 0.015 which exceeds the estimated maximal expected allele frequency of a disease causing FANCC allele indicating the variant to be a neutral polymorphism in populations of East Asian origin. In addition, two independent clinical laboratory databases classified this variant as Benign via ClinVar (without evidence to independently evaluate). Considering the high prevalence of the variant in the East Asian population, it was classified as Benign.
Leiden Open Variation Database RCV000588252 SCV001365323 uncertain significance not provided 2020-02-28 no assertion criteria provided curation Curator: Arleen D. Auerbach. Submitter to LOVD: Arleen D. Auerbach.
Department of Pathology and Laboratory Medicine,Sinai Health System RCV000124965 SCV001554254 benign not specified no assertion criteria provided clinical testing The FANCC p.Ile272= variant was identified in 1 of 1038 proband chromosomes (frequency: 0.001) from individuals or families with pancreatic and breast cancers and was present in 1 of 1316 control chromosomes (frequency: 0.001) from healthy individuals (Couch 2005, Seal 2003). The variant was also identified in dbSNP (ID: rs55719336) as “with other allele”; in ClinVar and Clinvitae databases as benign by GeneDx and Invitae, and as uncertain significance by Illumina Clinical Serivices; and in LOVD 3.0 database with no classification provided. Furthermore, the variant was also identified in the 1000 Genomes Project in 20 of 5000 chromosomes (frequency: 0.004) and in the NHLBI GO Exome Sequencing Project in 9 of 4406 African American alleles. The variant was not identified in Cosmic and MutDB, databases. The variant was identified in control databases in 339 (4 homozygous) of 277168 chromosomes at a frequency of 0.001 in the following populations: African in 31 of 24028 chromosomes (freq. 0.001), Latino in 2 of 34412 chromosomes (freq. 0.00006), European Non-Finnish in 1 of 126670 chromosomes (freq. 0.00001), East Asian in 291 of 18864 chromosomes (freq. 0.02), South Asian in 10 of 30780 chromosomes (freq. 0.0003), and in other in 4 of 6468 chromosomes (freq. 0.001) but was not seen in Ashkenazi Jewish and European Finnish populations (Genome Aggregation Consortium Feb 27, 2017). The p.Ile272= variant is not expected to have clinical significance because it does not result in a change of amino acid and is not located in a known consensus splice site. In addition, in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer, HumanSpliceFinder) do not predict a difference in splicing. In summary, based on the above information this variant meets our laboratory's criteria to be classified as benign.
Genome Diagnostics Laboratory, Amsterdam University Medical Center RCV000124965 SCV001808969 benign not specified no assertion criteria provided clinical testing
Genome Diagnostics Laboratory, University Medical Center Utrecht RCV000124965 SCV001926252 benign not specified no assertion criteria provided clinical testing

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