Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_StrongBP6BP7
The NM_014845.6(FIG4):āc.2154A>Gā(p.Pro718Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000105 in 1,613,270 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
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]
Verdict is Likely_benign. Variant got -6 ACMG points.
BP4
Computational evidence support a benign effect (BayesDel_noAF=-0.51).
BP6
Variant 6-109789651-A-G is Benign according to our data. Variant chr6-109789651-A-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 476855.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=1}.
BP7
Synonymous conserved (PhyloP=0.075 with no splicing effect.
Review Status: criteria provided, single submitter
Collection Method: clinical testing
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Charcot-Marie-Tooth disease Benign:1
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Molecular Genetics Laboratory, London Health Sciences Centre
Significance: Likely benign
Review Status: criteria provided, single submitter
Collection Method: clinical testing
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FIG4-related disorder Benign:1
Aug 26, 2024
PreventionGenetics, part of Exact Sciences
Significance: Likely benign
Review Status: no assertion criteria provided
Collection Method: clinical testing
This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -
Charcot-Marie-Tooth disease type 4 Benign:1
Jan 08, 2025
Labcorp Genetics (formerly Invitae), Labcorp
Significance: Likely benign
Review Status: criteria provided, single submitter