rs144688852

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_024577.4(SH3TC2):c.2812C>T(p.His938Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000603 in 1,614,194 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. H938H) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00042 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00062 ( 0 hom. )

Consequence

SH3TC2
NM_024577.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:9

Conservation

PhyloP100: -0.182

Variant links:

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]

SH3TC2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.100708455).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SH3TC2	NM_024577.4 linkuse as main transcript	c.2812C>T	p.His938Tyr	missense_variant	11/17	ENST00000515425.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SH3TC2	ENST00000515425.6 linkuse as main transcript	c.2812C>T	p.His938Tyr	missense_variant	11/17	1	NM_024577.4	P2	Q8TF17-1

Frequencies

GnomAD3 genomes

AF:

0.000420

AC:

AN:

152232

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000965

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000941

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000852

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000310

AC:

AN:

251384

Hom.:

AF XY:

0.000302

AC XY:

AN XY:

135876

show subpopulations

Gnomad AFR exome

AF:

0.000185

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000653

Gnomad FIN exome

AF:

0.0000924

Gnomad NFE exome

AF:

0.000616

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000623

AC:

910

AN:

1461844

Hom.:

Cov.:

AF XY:

0.000549

AC XY:

399

AN XY:

727216

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000580

Gnomad4 FIN exome

AF:

0.0000749

Gnomad4 NFE exome

AF:

0.000775

Gnomad4 OTH exome

AF:

0.000613

GnomAD4 genome

AF:

0.000420

AC:

AN:

152350

Hom.:

Cov.:

AF XY:

0.000309

AC XY:

AN XY:

74504

show subpopulations

Gnomad4 AFR

AF:

0.0000962

Gnomad4 AMR

AF:

0.0000653

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000941

Gnomad4 NFE

AF:

0.000853

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000598

Hom.:

Bravo

AF:

0.000363

TwinsUK

AF:

0.00162

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000814

AC:

ExAC

AF:

0.000338

AC:

EpiCase

AF:

0.000709

EpiControl

AF:

0.000830

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:9

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:3

Uncertain significance, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Mar 01, 2020	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Athena Diagnostics	Dec 20, 2021	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Jan 19, 2018	A variant of uncertain significance has been identified in the SH3TC2 gene. The H938Y variant has been reported previously with a R964X pathogenic variant in an individual with inherited peripheral neuropathy (LaÅ¡Å¡uthovÃ¡ et al., 2016). The H938Y variant is observed in 85/126638 (0.067%) alleles from individuals of European background in large population cohorts (Lek et al., 2016). The H938Y variant is a non-conservative amino acid substitution, which is likely to impact secondary protein structure as these residues differ in polarity, charge, size and/or other properties. However, in-silico analyses, including protein predictors and evolutionary conservation, support that this variant does not alter protein structure/function. Therefore, based on the currently available information, it is unclear whether this variant is a pathogenic variant or a rare benign variant. -

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

May 25, 2022

The p.H938Y variant (also known as c.2812C>T), located in coding exon 11 of the SH3TC2 gene, results from a C to T substitution at nucleotide position 2812. The histidine at codon 938 is replaced by tyrosine, an amino acid with similar properties. This variant has been reported in trans with a pathogenic variant in an individual with an inherited peripheral neuropathy (La&scaron;&scaron;uthová P et al. Orphanet J Rare Dis, 2016 08;11:118). This amino acid position is poorly conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Charcot-Marie-Tooth disease type 4C;C3150596:Susceptibility to mononeuropathy of the median nerve, mild

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Aug 24, 2021

- -

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

Charcot-Marie-Tooth disease type 4

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Oct 25, 2022

This sequence change replaces histidine, which is basic and polar, with tyrosine, which is neutral and polar, at codon 938 of the SH3TC2 protein (p.His938Tyr). This variant is present in population databases (rs144688852, gnomAD 0.07%). This missense change has been observed in individual(s) with clinical features of SH3TC2-related conditions (PMID: 27549087). ClinVar contains an entry for this variant (Variation ID: 448368). 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) performed at Invitae indicates that this missense variant is not expected to disrupt SH3TC2 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.085

BayesDel_addAF

Benign

-0.47

BayesDel_noAF

Benign

-0.47

Cadd

Benign

1.5

Dann

Benign

0.86

DEOGEN2

Benign

0.13

T;.

Eigen

Benign

-1.3

Eigen_PC

Benign

-1.3

FATHMM_MKL

Benign

0.055

LIST_S2

Benign

0.46

T;T

M_CAP

Benign

0.032

MetaRNN

Benign

0.10

T;T

MetaSVM

Benign

-0.88

MutationAssessor

Benign

0.0

N;.

MutationTaster

Benign

1.0

N;N;N;N

PrimateAI

Benign

0.29

PROVEAN

Benign

-1.8

N;N

REVEL

Benign

0.11

Sift

Uncertain

0.011

D;D

Sift4G

Uncertain

0.036

D;D

Polyphen

0.059

B;.

Vest4

0.55

MVP

0.47

MPC

0.043

ClinPred

0.019

GERP RS

-2.9

Varity_R

0.057

gMVP

0.12

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over