5-149027870-C-A

Variant names:

• chr5-149027870-C-A
• rs143032801
• NM_024577.4:c.1862G>T

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B.

Score: 4 - Uncertain Significance

4

PM2PP3_Moderate

The NM_024577.4(SH3TC2):​c.1862G>T​(p.Arg621Leu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R621H) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: SH3TC2 NM_024577.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.03
• 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 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.882

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SH3TC2	NM_024577.4	c.1862G>T	p.Arg621Leu	missense_variant	Exon 11 of 17	ENST00000515425.6	NP_078853.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SH3TC2	ENST00000515425.6	c.1862G>T	p.Arg621Leu	missense_variant	Exon 11 of 17	1	NM_024577.4	ENSP00000423660.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.42
BayesDel_addAF	Uncertain	0.091	D
BayesDel_noAF	Benign	-0.11
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.63	D;.
Eigen	Uncertain	0.65
Eigen_PC	Uncertain	0.63
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.88	D;D
M_CAP	Uncertain	0.21	D
MetaRNN	Pathogenic	0.88	D;D
MetaSVM	Uncertain	0.024	D
MutationAssessor	Uncertain	2.7	M;.
PhyloP100		5.0
PrimateAI	Benign	0.48	T
PROVEAN	Pathogenic	-5.8	D;D
REVEL	Uncertain	0.48
Sift	Uncertain	0.0030	D;D
Sift4G	Uncertain	0.0040	D;D
Polyphen		0.99	D;.
Vest4		0.69
MutPred		0.65		Loss of solvent accessibility (P = 0.0299);.;
MVP		0.92
MPC		0.24
ClinPred		1.0	D
GERP RS		6.0
Varity_R		0.60
gMVP		0.70
Mutation Taster		=26/74	disease causing

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

Other links and lift over

dbSNP: rs143032801; hg19: chr5-148407433;