NM_000337.6:c.74_77dupTGGG

Variant names:

• chr5-156344556-A-AGGTG
• rs1554094947
• NM_000337.6:c.74_77dupTGGG

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_000337.6(SGCD):​c.74_77dupTGGG​(p.Ile27GlyfsTer40) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★). The gene SGCD is included in the ClinGen Criteria Specification Registry.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SGCD NM_000337.6 frameshift
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 2.10
• Publications: 0 publications found

Genes affected

SGCD (HGNC:10807): (sarcoglycan delta) The protein encoded by this gene is one of the four known components of the sarcoglycan complex, which is a subcomplex of the dystrophin-glycoprotein complex (DGC). DGC forms a link between the F-actin cytoskeleton and the extracellular matrix. This protein is expressed most abundantly in skeletal and cardiac muscle. Mutations in this gene have been associated with autosomal recessive limb-girdle muscular dystrophy and dilated cardiomyopathy. Alternatively spliced transcript variants encoding distinct isoforms have been observed for this gene. [provided by RefSeq, Jul 2008]

SGCD Gene-Disease associations (from GenCC):

• autosomal recessive limb-girdle muscular dystrophy

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: ClinGen, PanelApp Australia
• autosomal recessive limb-girdle muscular dystrophy type 2F

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), Myriad Women’s Health, Orphanet
• familial isolated dilated cardiomyopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• dilated cardiomyopathy

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
• dilated cardiomyopathy 1L

  Inheritance: AD Classification: NO_KNOWN Submitted by: Ambry Genetics

LOC124901120 (HGNC:):

ACMG classification

Specifications for SGCD are available in the ClinGen Criteria Specification Registry and recommended for reference when assigning criteria.

Our verdict: Pathogenic. The variant received 12 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant located near the start codon (<100nt), not predicted to undergo nonsense mediated mRNA decay. There are 34 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 5-156344556-A-AGGTG is Pathogenic according to our data. Variant chr5-156344556-A-AGGTG is described in ClinVar as Pathogenic. ClinVar VariationId is 411697.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000337.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SGCD	NM_000337.6	MANE Select	c.74_77dupTGGG	p.Ile27GlyfsTer40	frameshift	Exon 3 of 9	NP_000328.2
	SGCD	NM_001128209.2		c.71_74dupTGGG	p.Ile26GlyfsTer40	frameshift	Exon 2 of 8	NP_001121681.1	Q92629-1
	SGCD	NM_172244.3		c.74_77dupTGGG	p.Ile27GlyfsTer40	frameshift	Exon 3 of 8	NP_758447.1	Q92629-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SGCD	ENST00000337851.9	TSL:1 MANE Select	c.74_77dupTGGG	p.Ile27GlyfsTer40	frameshift	Exon 3 of 9	ENSP00000338343.4	Q92629-2
	SGCD	ENST00000435422.7	TSL:1	c.71_74dupTGGG	p.Ile26GlyfsTer40	frameshift	Exon 2 of 8	ENSP00000403003.2	Q92629-1
	SGCD	ENST00000959784.1		c.74_77dupTGGG	p.Ile27GlyfsTer55	frameshift	Exon 3 of 10	ENSP00000629843.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
1	-	-	Autosomal recessive limb-girdle muscular dystrophy type 2F (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		2.1
Mutation Taster		=1/199	disease causing (ClinVar)

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs1554094947; hg19: chr5-155771566;