rs1554121529

Variant names:

• chr5-149026702-G-C
• rs1554121529
• NM_024577.4:c.2923C>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 0P and 0B.

The NM_024577.4(SH3TC2):​c.2923C>G​(p.Pro975Ala) variant causes a missense change. The variant allele was found at a frequency of 0.00000889 in 1,461,892 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000089 (0 hom.)
• Consequence: SH3TC2 NM_024577.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:4
• Conservation: PhyloP100: 6.94
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• autosomal recessive hereditary demyelinating motor and sensory neuropathy

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• Charcot-Marie-Tooth disease type 4C

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Ambry Genetics
• susceptibility to mononeuropathy of the median nerve, mild

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SH3TC2	NM_024577.4	c.2923C>G	p.Pro975Ala	missense_variant	Exon 12 of 17	ENST00000515425.6	NP_078853.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SH3TC2	ENST00000515425.6	c.2923C>G	p.Pro975Ala	missense_variant	Exon 12 of 17	1	NM_024577.4	ENSP00000423660.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000889 AC: 13 AN: 1461892 Hom.: 0 Cov.: 30 AF XY: 0.00000963 AC XY: 7 AN XY: 727246

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.0000108 AC: 12 AN: 1112012

Other (OTH) AF: 0.0000166 AC: 1 AN: 60396

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Uncertain:3

Nov 03, 2016

Eurofins Ntd Llc (ga)

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Nov 06, 2017

Athena Diagnostics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Apr 20, 2017

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Not observed in large population cohorts (Lek et al., 2016; McVean et al., 2012; Exome Variant Server); In silico analyses, including protein predictors and evolutionary conservation, support a deleterious effect; Has not been previously published as pathogenic or benign to our knowledge -

Charcot-Marie-Tooth disease type 4 Uncertain:1

Feb 21, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces proline, which is neutral and non-polar, with alanine, which is neutral and non-polar, at codon 975 of the SH3TC2 protein (p.Pro975Ala). This variant is not present in population databases (gnomAD no frequency). 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. 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. ClinVar contains an entry for this variant (Variation ID: 497745). This variant has not been reported in the literature in individuals affected with SH3TC2-related conditions. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.15
BayesDel_addAF	Uncertain	0.077	D
BayesDel_noAF	Benign	-0.13
CADD	Uncertain	24
DANN	Uncertain	0.98
DEOGEN2	Uncertain	0.52	D;.
Eigen	Uncertain	0.57
Eigen_PC	Uncertain	0.60
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.92	D;D
M_CAP	Uncertain	0.093	D
MetaRNN	Uncertain	0.56	D;D
MetaSVM	Uncertain	-0.12	T
MutationAssessor	Uncertain	2.5	M;.
PhyloP100		6.9
PrimateAI	Uncertain	0.50	T
PROVEAN	Pathogenic	-5.6	D;D
REVEL	Uncertain	0.43
Sift	Benign	0.030	D;D
Sift4G	Benign	0.095	T;T
Polyphen		0.96	D;.
Vest4		0.51
MutPred		0.36		Loss of glycosylation at P975 (P = 0.0703);.;
MVP		0.89
MPC		0.23
ClinPred		0.96	D
GERP RS		5.4
Varity_R		0.32
gMVP		0.079
Mutation Taster		=71/29	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.14		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs1554121529; hg19: chr5-148406265;