NM_024577.4:c.2691C>G

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_024577.4(SH3TC2):c.2691C>G(p.Asn897Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000887 in 1,614,204 control chromosomes in the GnomAD database, including 11 homozygotes. 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 Likely benign (★★).

Frequency

Genomes: 𝑓 0.0046 ( 5 hom., cov: 33)

Exomes 𝑓: 0.00050 ( 6 hom. )

Consequence

SH3TC2
NM_024577.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:7

Conservation

PhyloP100: 0.318

Publications

2 publications found

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 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

SH3TC2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0094849765).

BP6

Variant 5-149027041-G-C is Benign according to our data. Variant chr5-149027041-G-C is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 188311.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00456 (694/152334) while in subpopulation AFR AF = 0.0161 (669/41578). AF 95% confidence interval is 0.0151. There are 5 homozygotes in GnomAd4. There are 320 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 5 AR,AD gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_024577.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SH3TC2	NM_024577.4	MANE Select	c.2691C>G	p.Asn897Lys	missense	Exon 11 of 17	NP_078853.2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
SH3TC2	ENST00000515425.6	TSL:1 MANE Select	c.2691C>G	p.Asn897Lys	missense	Exon 11 of 17	ENSP00000423660.1
SH3TC2	ENST00000512049.5	TSL:1	c.2670C>G	p.Asn890Lys	missense	Exon 11 of 17	ENSP00000421860.1
SH3TC2	ENST00000323829.9	TSL:1	n.*2079C>G		non_coding_transcript_exon	Exon 12 of 18	ENSP00000313025.5

Frequencies

GnomAD3 genomes

AF:

0.00454

AC:

691

AN:

152216

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0161

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00105

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00192

GnomAD2 exomes

AF:

0.00137

AC:

345

AN:

251030

AF XY:

0.000966

show subpopulations

Gnomad AFR exome

AF:

0.0193

Gnomad AMR exome

AF:

0.000607

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000265

Gnomad OTH exome

AF:

0.000815

GnomAD4 exome

AF:

0.000505

AC:

738

AN:

1461870

Hom.:

Cov.:

AF XY:

0.000400

AC XY:

291

AN XY:

727232

show subpopulations

African (AFR)

AF:

0.0185

AC:

620

AN:

33480

American (AMR)

AF:

0.000738

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000464

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53404

Middle Eastern (MID)

AF:

0.000520

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000540

AC:

AN:

1112008

Other (OTH)

AF:

0.00119

AC:

AN:

60392

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.490

Heterozygous variant carriers

121

182

242

303

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00456

AC:

694

AN:

152334

Hom.:

Cov.:

AF XY:

0.00430

AC XY:

320

AN XY:

74492

show subpopulations

African (AFR)

AF:

0.0161

AC:

669

AN:

41578

American (AMR)

AF:

0.00105

AC:

AN:

15302

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3466

East Asian (EAS)

AF:

0.00

AC:

AN:

5182

South Asian (SAS)

AF:

0.00

AC:

AN:

4834

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10624

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000735

AC:

AN:

68032

Other (OTH)

AF:

0.00190

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

105

140

175

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000743

Hom.:

Bravo

AF:

0.00522

ESP6500AA

AF:

0.0159

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.00173

AC:

210

Asia WGS

AF:

0.000866

AC:

AN:

3478

EpiCase

AF:

0.00

EpiControl

AF:

0.000119

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:3

Oct 31, 2018

Athena Diagnostics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Apr 25, 2018

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

Charcot-Marie-Tooth disease

Benign:1

Molecular Genetics Laboratory, London Health Sciences Centre

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Charcot-Marie-Tooth disease type 4C

Benign:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

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 4

Benign:1

Jan 27, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Susceptibility to mononeuropathy of the median nerve, mild

Benign:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.58

BayesDel_noAF

Benign

-0.59

CADD

Benign

(source)

DANN

Benign

0.44

DEOGEN2

Benign

0.10

Eigen

Benign

-0.71

Eigen_PC

Benign

-0.59

FATHMM_MKL

Benign

0.50

LIST_S2

Benign

0.57

MetaRNN

Benign

0.0095

MetaSVM

Benign

-0.63

MutationAssessor

Benign

1.5

PhyloP100

0.32

PrimateAI

Benign

0.27

PROVEAN

Benign

-1.3

REVEL

Benign

0.15

Sift

Benign

0.36

Sift4G

Benign

0.94

Polyphen

0.0060

Vest4

0.15

MutPred

0.48

Gain of MoRF binding (P = 0.028)

MVP

0.66

MPC

0.044

ClinPred

0.0033

GERP RS

2.0

Varity_R

0.056

gMVP

0.066

Mutation Taster

=99/1

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over