Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBA1
The ENST00000230124.8(FIG4):c.1090A>T(p.Met364Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0499 in 1,612,658 control chromosomes in the GnomAD database, including 3,876 homozygotes. In-silico tool predicts a benign outcome for this variant. 12/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another nucleotide change resulting in same amino acid change has been previously reported as Uncertain significancein ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. M364K) has been classified as Uncertain significance.
FIG4 (HGNC:16873): (FIG4 phosphoinositide 5-phosphatase) The protein encoded by this gene belongs to the SAC domain-containing protein gene family. The SAC domain, approximately 400 amino acids in length and consisting of seven conserved motifs, has been shown to possess phosphoinositide phosphatase activity. The yeast homolog, Sac1p, is involved in the regulation of various phosphoinositides, and affects diverse cellular functions such as actin cytoskeleton organization, Golgi function, and maintenance of vacuole morphology. Membrane-bound phosphoinositides function as signaling molecules and play a key role in vesicle trafficking in eukaryotic cells. Mutations in this gene have been associated with Charcot-Marie-Tooth disease, type 4J. [provided by RefSeq, Jul 2008]
Computational evidence support a benign effect (MetaRNN=0.0016498268).
BP6
Variant 6-109743725-A-T is Benign according to our data. Variant chr6-109743725-A-T is described in ClinVar as [Likely_benign]. Clinvar id is 137375.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr6-109743725-A-T is described in Lovd as [Benign]. Variant chr6-109743725-A-T is described in Lovd as [Likely_benign].
BA1
GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.218 is higher than 0.05.
Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center
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Benign, no assertion criteria provided
clinical testing
Genome Diagnostics Laboratory, University Medical Center Utrecht
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Benign, criteria provided, single submitter
clinical testing
GeneDx
Jun 05, 2014
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. -
not provided Benign:2
Likely benign, criteria provided, single submitter
not provided
Breakthrough Genomics, Breakthrough Genomics
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Likely benign, no assertion criteria provided
clinical testing
Genome Diagnostics Laboratory, Amsterdam University Medical Center
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Charcot-Marie-Tooth disease Benign:1
Likely benign, criteria provided, single submitter
clinical testing
Molecular Genetics Laboratory, London Health Sciences Centre
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Charcot-Marie-Tooth disease type 4J;C2675491:Amyotrophic lateral sclerosis type 11 Benign:1
Benign, criteria provided, single submitter
clinical testing
Athena Diagnostics
Apr 28, 2017
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Amyotrophic lateral sclerosis type 11 Benign:1
Benign, criteria provided, single submitter
clinical testing
Illumina Laboratory Services, Illumina
Jan 13, 2018
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. -
Charcot-Marie-Tooth disease type 4J Benign:1
Benign, criteria provided, single submitter
clinical testing
Illumina Laboratory Services, Illumina
Jan 13, 2018
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. -