chr4-52033582-C-A

Position:

chr4-52033582-C-A

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BA1

This summary comes from the ClinGen Evidence Repository: The NM_000232.5: c.92G>T variant in SGCB is a missense variant predicted to cause substitution of serine by isoleucine at amino acid 31 (p.Ser31Ile). The filtering allele frequency of this variant is 0.007653 in the African/African American population in gnomAD v3.1.2 (the lower threshold of the 95% CI of 347/41414 genome chromosomes), which is higher than the LGMD VCEP threshold (>0.002) for BA1 and therefore meets this criterion (BA1). The computational predictor REVEL gives a score of 0.18, which is above the LGMD VCEP threshold predicting a benign impact on sarcoglycan β function (<0.1; BP4 not met). In summary, this variant meets the criteria to be classified as Benign for autosomal recessive limb girdle muscular dystrophy based on the ACMG/AMP criteria applied, as specified by the ClinGen LGMD VCEP (LGMD VCEP specifications version 1.0.0; 01/09/2025): BA1. LINK:https://erepo.genome.network/evrepo/ui/classification/CA145911/MONDO:0015152/184

Frequency

Genomes: 𝑓 0.0024 ( 2 hom., cov: 32)

Exomes 𝑓: 0.00022 ( 0 hom. )

Consequence

SGCB
NM_000232.5 missense

Scores

Clinical Significance

Benign reviewed by expert panel U:1B:6

Conservation

PhyloP100: 0.805

Variant links:

Genes affected

SGCB (HGNC:10806): (sarcoglycan beta) This gene encodes a member of the sarcoglycan family. Sarcoglycans are transmembrane components in the dystrophin-glycoprotein complex which help stabilize the muscle fiber membranes and link the muscle cytoskeleton to the extracellular matrix. Mutations in this gene have been associated with limb-girdle muscular dystrophy.[provided by RefSeq, Oct 2008]

SGCB links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -8 ACMG points.

BA1

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

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SGCB	NM_000232.5 link	c.92G>T	p.Ser31Ile	missense_variant	2/6	ENST00000381431.10	NP_000223.1	Q16585-1Q5U0N0
SGCB	XM_047416074.1 link	c.34-3719G>T		intron_variant			XP_047272030.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
SGCB	ENST00000381431.10 link	c.92G>T	p.Ser31Ile	missense_variant	2/6	1	NM_000232.5	ENSP00000370839.6	Q16585-1
SGCB	ENST00000506357.5 link	n.77G>T		non_coding_transcript_exon_variant	2/5	5		ENSP00000421235.1	H0Y8J3
SGCB	ENST00000514133.1 link	n.59G>T		non_coding_transcript_exon_variant	1/4	5		ENSP00000425818.1	H0YA15

Frequencies

GnomAD3 genomes

AF:

0.00242

AC:

368

AN:

152170

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00838

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00118

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:

0.0000147

Gnomad OTH

AF:

0.000956

GnomAD3 exomes

AF:

0.000497

AC:

125

AN:

251468

Hom.:

AF XY:

0.000383

AC XY:

AN XY:

135910

show subpopulations

Gnomad AFR exome

AF:

0.00701

Gnomad AMR exome

AF:

0.000289

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:

0.000163

GnomAD4 exome

AF:

0.000223

AC:

326

AN:

1461660

Hom.:

Cov.:

AF XY:

0.000165

AC XY:

120

AN XY:

727140

show subpopulations

Gnomad4 AFR exome

AF:

0.00806

Gnomad4 AMR exome

AF:

0.000470

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:

0.00000540

Gnomad4 OTH exome

AF:

0.000381

GnomAD4 genome

AF:

0.00242

AC:

369

AN:

152288

Hom.:

Cov.:

AF XY:

0.00234

AC XY:

174

AN XY:

74476

show subpopulations

Gnomad4 AFR

AF:

0.00840

Gnomad4 AMR

AF:

0.00111

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.000946

Alfa

AF:

0.000396

Hom.:

Bravo

AF:

0.00249

ESP6500AA

AF:

0.00590

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000626

AC:

Asia WGS

AF:

0.00115

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Benign

Submissions summary: Uncertain:1Benign:6

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

not specified

Benign:2

Benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	May 29, 2013	- -
Benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	-	- -

not provided

Benign:2

Likely benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Likely benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Mar 12, 2020	- -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 07, 2021

The c.92G>T (p.S31I) alteration is located in exon 2 (coding exon 2) of the SGCB gene. This alteration results from a G to T substitution at nucleotide position 92, causing the serine (S) at amino acid position 31 to be replaced by an isoleucine (I). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Autosomal recessive limb-girdle muscular dystrophy

Benign:1

Benign, reviewed by expert panel

curation

ClinGen Limb Girdle Muscular Dystrophy Variant Curation Expert Panel, ClinGen

Jan 09, 2025

The NM_000232.5: c.92G>T variant in SGCB is a missense variant predicted to cause substitution of serine by isoleucine at amino acid 31 (p.Ser31Ile). The filtering allele frequency of this variant is 0.007653 in the African/African American population in gnomAD v3.1.2 (the lower threshold of the 95% CI of 347/41414 genome chromosomes), which is higher than the LGMD VCEP threshold (>0.002) for BA1 and therefore meets this criterion (BA1). The computational predictor REVEL gives a score of 0.18, which is above the LGMD VCEP threshold predicting a benign impact on sarcoglycan β function (<0.1; BP4 not met). In summary, this variant meets the criteria to be classified as Benign for autosomal recessive limb girdle muscular dystrophy based on the ACMG/AMP criteria applied, as specified by the ClinGen LGMD VCEP (LGMD VCEP specifications version 1.0.0; 01/09/2025): BA1. -

Autosomal recessive limb-girdle muscular dystrophy type 2E

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 08, 2025

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.34

BayesDel_noAF

Benign

-0.26

CADD

Benign

DANN

Benign

0.97

DEOGEN2

Benign

0.38

Eigen

Benign

-0.86

Eigen_PC

Benign

-0.77

FATHMM_MKL

Benign

0.39

LIST_S2

Benign

0.77

M_CAP

Benign

0.060

MetaRNN

Benign

0.0080

MetaSVM

Benign

-0.59

MutationAssessor

Benign

0.55

PrimateAI

Uncertain

0.63

PROVEAN

Benign

-1.2

REVEL

Benign

0.18

Sift

Benign

0.11

Sift4G

Benign

0.13

Polyphen

0.0060

Vest4

0.22

MVP

0.68

MPC

0.089

ClinPred

0.0079

GERP RS

4.1

Varity_R

0.058

gMVP

0.57

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

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