rs146666910

Positions:

• chr5-149028289-G-A
• chr5-149028289-G-C

Variant summary

Our verdict is Benign. Variant got -11 ACMG points: 2P and 13B. PM2 BP4_Strong BP6_Very_Strong BP7

The NM_024577.4(SH3TC2):​c.1443C>T​(p.Asp481=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000566 in 1,613,952 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.00032 (0 hom., cov: 33)
  • Exomes 𝑓: 0.00059 (1 hom.)
• Consequence: SH3TC2 NM_024577.4 synonymous
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:6
• Conservation: PhyloP100: 1.49

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]

ACMG classification

Verdict is Benign. Variant got -11 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.56).
• BP6: Variant 5-149028289-G-A is Benign according to our data. Variant chr5-149028289-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 215534.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr5-149028289-G-A is described in Lovd as [Likely_benign].
• BP7: Synonymous conserved (PhyloP=1.49 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SH3TC2	NM_024577.4	c.1443C>T	p.Asp481=	synonymous_variant	11/17	ENST00000515425.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SH3TC2	ENST00000515425.6	c.1443C>T	p.Asp481=	synonymous_variant	11/17	1	NM_024577.4	P2

Frequencies

GnomAD3 genomes AF: 0.000315 AC: 48 AN: 152204 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.0000724

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000589

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.000514

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.000434 AC: 109 AN: 251132 Hom.: 1 AF XY: 0.000508 AC XY: 69 AN XY: 135744

Gnomad AFR exome AF: 0.0000616

Gnomad AMR exome AF: 0.000578

Gnomad ASJ exome AF: 0.0000992

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.0000466

Gnomad NFE exome AF: 0.000739

Gnomad OTH exome AF: 0.000326

GnomAD4 exome AF: 0.000592 AC: 865 AN: 1461630 Hom.: 1 Cov.: 80 AF XY: 0.000605 AC XY: 440 AN XY: 727094

Gnomad4 AFR exome AF: 0.0000597

Gnomad4 AMR exome AF: 0.000581

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.0000564

Gnomad4 NFE exome AF: 0.000730

Gnomad4 OTH exome AF: 0.000298

GnomAD4 genome AF: 0.000315 AC: 48 AN: 152322 Hom.: 0 Cov.: 33 AF XY: 0.000201 AC XY: 15 AN XY: 74490

Gnomad4 AFR AF: 0.0000722

Gnomad4 AMR AF: 0.000588

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000515

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000429 Hom.: 0

Bravo AF: 0.000321

EpiCase AF: 0.000709

EpiControl AF: 0.00107

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:6

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:3

Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Nov 23, 2020	- -
Likely benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Nov 09, 2023	- -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Jun 01, 2024	SH3TC2: BP4, BS1 -

Charcot-Marie-Tooth disease Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Molecular Genetics Laboratory, London Health Sciences Centre

-

- -

Inborn genetic diseases Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 11, 2019

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Charcot-Marie-Tooth disease type 4 Benign:1

Benign, criteria provided, single submitter

clinical testing

Invitae

Jan 07, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.56
CADD	Benign	0.92
DANN	Benign	0.39

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

Other links and lift over

dbSNP: rs146666910; hg19: chr5-148407852;