rs201256776
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Variant summary
Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4
The NM_024577.4(SH3TC2):āc.1721A>Gā(p.Asn574Ser) variant causes a missense change. The variant allele was found at a frequency of 0.000153 in 1,614,050 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).
Frequency
Genomes: š 0.000072 ( 0 hom., cov: 33)
Exomes š: 0.00016 ( 0 hom. )
Consequence
SH3TC2
NM_024577.4 missense
NM_024577.4 missense
Scores
11
8
Clinical Significance
Conservation
PhyloP100: 5.15
Genes affected
SH3TC2 (HGNC:29427): (SH3 domain and tetratricopeptide repeats 2) This gene encodes a protein with two N-terminal Src homology 3 (SH3) domains and 10 tetratricopeptide repeat (TPR) motifs, and is a member of a small gene family. The gene product has been proposed to be an adapter or docking molecule. Mutations in this gene result in autosomal recessive Charcot-Marie-Tooth disease type 4C, a childhood-onset neurodegenerative disease characterized by demyelination of motor and sensory neurons. [provided by RefSeq, Jul 2008]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 1 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
BP4
Computational evidence support a benign effect (MetaRNN=0.34103203).
Transcripts
RefSeq
| Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|
| SH3TC2 | NM_024577.4 | c.1721A>G | p.Asn574Ser | missense_variant | 11/17 | ENST00000515425.6 | NP_078853.2 |
Ensembl
| Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
|---|---|---|---|---|---|---|---|---|---|---|
| SH3TC2 | ENST00000515425.6 | c.1721A>G | p.Asn574Ser | missense_variant | 11/17 | 1 | NM_024577.4 | ENSP00000423660.1 |
Frequencies
GnomAD3 genomes 0.0000723 AC: 11AN: 152220Hom.: 0 Cov.: 33
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GnomAD3 exomes AF: 0.000108 AC: 27AN: 250626Hom.: 0 AF XY: 0.000118 AC XY: 16AN XY: 135484
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GnomAD4 exome AF: 0.000161 AC: 236AN: 1461830Hom.: 0 Cov.: 33 AF XY: 0.000162 AC XY: 118AN XY: 727208
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GnomAD4 genome 0.0000723 AC: 11AN: 152220Hom.: 0 Cov.: 33 AF XY: 0.0000807 AC XY: 6AN XY: 74364
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ClinVar
Significance: Conflicting classifications of pathogenicity
Submissions summary: Uncertain:6Benign:1
Revision: criteria provided, conflicting classifications
LINK: link
Submissions by phenotype
not provided Uncertain:2
| Uncertain significance, criteria provided, single submitter | clinical testing | GeneDx | Feb 10, 2023 | Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Reported previously as a variant of uncertain significance in a patient with a suspected diagnosis of Charcot-Marie-Tooth disease; however, clinical and segregation information was not provided (Volodarsky et al., 2021); Previously reported as a variant of uncertain significance in an individual with PHARC syndrome who also homozygous for a nonsense variant in another gene associated with this syndrome (Thimm et al., 2020); This variant is associated with the following publications: (PMID: 32376792, 32077159, 25614874) - |
| Uncertain significance, criteria provided, single submitter | clinical testing | Mayo Clinic Laboratories, Mayo Clinic | Oct 17, 2023 | - - |
Charcot-Marie-Tooth disease Uncertain:1
| Uncertain significance, criteria provided, single submitter | clinical testing | Molecular Genetics Laboratory, London Health Sciences Centre | - | - - |
Charcot-Marie-Tooth disease type 4C Uncertain:1
| Uncertain significance, 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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. - |
Inborn genetic diseases Uncertain:1
| Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Jul 25, 2023 | The c.1721A>G (p.N574S) alteration is located in exon 11 (coding exon 11) of the SH3TC2 gene. This alteration results from a A to G substitution at nucleotide position 1721, causing the asparagine (N) at amino acid position 574 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. - |
Susceptibility to mononeuropathy of the median nerve, mild Uncertain:1
| Uncertain significance, 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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. - |
Charcot-Marie-Tooth disease type 4 Benign:1
| Likely benign, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Nov 13, 2023 | - - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
BayesDel_addAF
Benign
T
BayesDel_noAF
Benign
CADD
Benign
DANN
Uncertain
DEOGEN2
Uncertain
D;.
Eigen
Uncertain
Eigen_PC
Uncertain
FATHMM_MKL
Uncertain
D
LIST_S2
Uncertain
D;D
M_CAP
Benign
D
MetaRNN
Benign
T;T
MetaSVM
Uncertain
T
MutationAssessor
Uncertain
M;.
PrimateAI
Benign
T
PROVEAN
Uncertain
D;D
REVEL
Uncertain
Sift
Benign
D;D
Sift4G
Uncertain
D;D
Polyphen
D;.
Vest4
MVP
MPC
ClinPred
T
GERP RS
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gMVP
Splicing
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at