13-23203692-C-T

Position:

chr13-23203692-C-T

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 0P and 1B. BP4

This summary comes from the ClinGen Evidence Repository: The NM_000231.3: c.1-3C>T variant is an intronic SGCG variant that is located in a splice region. The computational splicing predictor SpliceAI gives a score of 0.02 for acceptor loss, suggesting that the variant has no impact on splicing since it does not exceed the designated LGMD VCEP threshold (≤0.05) (BP4). The highest minor allele frequency of this variant is 0.0003793 (6/15820 exome chromosomes) in the African/African American population in gnomAD v2.1.1, which is greater than the ClinGen LGMD threshold (≤0.00009) for PM2_Supporting, and therefore does not meet this criterion (PM2_Supporting, BA1, BS1 criteria not met). In summary, this variant meets the criteria to be classified as Likely Benign for autosomal recessive limb girdle muscular dystrophy based on the ACMG/AMP criteria applied, as specified by the ClinGen Limb-Girdle Muscular Dystrophy VCEP (LGMD VCEP specifications version 1.0.0; 01/08/2025): BP4. LINK:https://erepo.genome.network/evrepo/ui/classification/CA6909546/MONDO:0015152/185

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000048 ( 0 hom. )

Consequence

SGCG
NM_000231.3 splice_region, intron

Scores

Splicing: ADA: 0.04313

Clinical Significance

Likely benign reviewed by expert panel U:3B:1

Conservation

PhyloP100: 2.67

Variant links:

Genes affected

SGCG (HGNC:10809): (sarcoglycan gamma) This gene encodes gamma-sarcoglycan, one of several sarcolemmal transmembrane glycoproteins that interact with dystrophin. The dystrophin-glycoprotein complex (DGC) spans the sarcolemma and is comprised of dystrophin, syntrophin, alpha- and beta-dystroglycans and sarcoglycans. The DGC provides a structural link between the subsarcolemmal cytoskeleton and the extracellular matrix of muscle cells. Defects in the encoded protein can lead to early onset autosomal recessive muscular dystrophy, in particular limb-girdle muscular dystrophy, type 2C (LGMD2C). [provided by RefSeq, Oct 2008]

SGCG links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -1 ACMG points.

BP4

For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SGCG	NM_000231.3 link	c.1-3C>T		splice_region_variant, intron_variant		ENST00000218867.4	NP_000222.2	Q13326

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SGCG	ENST00000218867.4 link	c.1-3C>T		splice_region_variant, intron_variant		1	NM_000231.3	ENSP00000218867.3		Q13326

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152188

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000145

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000244

AC:

AN:

245446

Hom.:

AF XY:

0.00000755

AC XY:

AN XY:

132476

show subpopulations

Gnomad AFR exome

AF:

0.000379

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000480

AC:

AN:

1457276

Hom.:

Cov.:

AF XY:

0.00000276

AC XY:

AN XY:

724690

show subpopulations

Gnomad4 AFR exome

AF:

0.000180

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152188

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74342

show subpopulations

Gnomad4 AFR

AF:

0.000145

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000986

Hom.:

Bravo

AF:

0.0000756

ClinVar

Significance: Likely benign

Submissions summary: Uncertain:3Benign:1

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

Autosomal recessive limb-girdle muscular dystrophy type 2C

Uncertain:2

Uncertain significance, no assertion criteria provided	clinical testing	Natera, Inc.	Sep 16, 2020	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Nov 10, 2021	- -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Athena Diagnostics

Jun 18, 2019

- -

Autosomal recessive limb-girdle muscular dystrophy

Benign:1

Likely benign, reviewed by expert panel

curation

ClinGen Limb Girdle Muscular Dystrophy Variant Curation Expert Panel, ClinGen

Jan 08, 2025

The NM_000231.3: c.1-3C>T variant is an intronic SGCG variant that is located in a splice region. The computational splicing predictor SpliceAI gives a score of 0.02 for acceptor loss, suggesting that the variant has no impact on splicing since it does not exceed the designated LGMD VCEP threshold (≤0.05) (BP4). The highest minor allele frequency of this variant is 0.0003793 (6/15820 exome chromosomes) in the African/African American population in gnomAD v2.1.1, which is greater than the ClinGen LGMD threshold (≤0.00009) for PM2_Supporting, and therefore does not meet this criterion (PM2_Supporting, BA1, BS1 criteria not met). In summary, this variant meets the criteria to be classified as Likely Benign for autosomal recessive limb girdle muscular dystrophy based on the ACMG/AMP criteria applied, as specified by the ClinGen Limb-Girdle Muscular Dystrophy VCEP (LGMD VCEP specifications version 1.0.0; 01/08/2025): BP4. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.46

CADD

Benign

9.4

DANN

Benign

0.52

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.043

dbscSNV1_RF

Benign

0.34

SpliceAI score (max)

0.020

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