NM_000023.4(SGCA):c.929A>G (p.Tyr310Cys) AND Autosomal recessive limb-girdle muscular dystrophy type 2D

This record was updated by the submitter. Please see the current version.

Germline classification:: Uncertain significance (4 submissions)
Last evaluated:: Feb 8, 2023
Review status:: 2 stars out of maximum of 4 stars
criteria provided, multiple submitters, no conflicts

Somatic classification of clinical impact:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Somatic classification of oncogenicity:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Record status:: current
Accession:: RCV000545952.13

Allele description

NM_000023.4(SGCA):c.929A>G (p.Tyr310Cys)

Gene:

SGCA:sarcoglycan alpha [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

17q21.33

Genomic location:

Preferred name:

NM_000023.4(SGCA):c.929A>G (p.Tyr310Cys)

HGVS:

NC_000017.11:g.50170324A>G
NG_008889.1:g.9320A>G
NM_000023.4:c.929A>GMANE SELECT
NM_001135697.3:c.585-316A>G
NP_000014.1:p.Tyr310Cys
LRG_203t1:c.929A>G
LRG_203:g.9320A>G
NC_000017.10:g.48247685A>G
NM_000023.2:c.929A>G

Protein change:

Y310C

Links:

dbSNP: rs145252144

NCBI 1000 Genomes Browser:

rs145252144

Molecular consequence:

NM_001135697.3:c.585-316A>G - intron variant - [Sequence Ontology: SO:0001627]
NM_000023.4:c.929A>G - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Autosomal recessive limb-girdle muscular dystrophy type 2D (LGMDR3)
Synonyms:: ADHALINOPATHY, PRIMARY; Limb-girdle muscular dystrophy, type 2D; Muscular dystrophy limb-girdle with alpha-sarcoglycan; See all synonyms [MedGen]
Identifiers:: MONDO: MONDO:0011968; MedGen: C2936332; Orphanet: 62; OMIM: 608099

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000649784	Invitae	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Jul 12, 2022)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]
SCV002087584	Natera, Inc.	no assertion criteria provided	Uncertain significance (Feb 12, 2020)	germline	clinical testing
SCV003827567	Revvity Omics, Revvity	criteria provided, single submitter (ACMG Guidelines, 2015)	Uncertain significance (Oct 26, 2020)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]
SCV003931705	Genome-Nilou Lab	criteria provided, single submitter (ACMG Guidelines, 2015)	Uncertain significance (Feb 8, 2023)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]

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Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing

Citations

PubMed

Sherloc: a comprehensive refinement of the ACMG-AMP variant classification criteria.

Nykamp K, Anderson M, Powers M, Garcia J, Herrera B, Ho YY, Kobayashi Y, Patil N, Thusberg J, Westbrook M; Invitae Clinical Genomics Group., Topper S.

Genet Med. 2017 Oct;19(10):1105-1117. doi: 10.1038/gim.2017.37. Epub 2017 May 11. Erratum in: Genet Med. 2020 Jan;22(1):240. doi: 10.1038/s41436-019-0624-9.

PubMed [citation]

PMID:: 28492532
PMCID:: PMC5632818

Standards and guidelines for the interpretation of sequence variants: a joint consensus recommendation of the American College of Medical Genetics and Genomics and the Association for Molecular Pathology.

Richards S, Aziz N, Bale S, Bick D, Das S, Gastier-Foster J, Grody WW, Hegde M, Lyon E, Spector E, Voelkerding K, Rehm HL; ACMG Laboratory Quality Assurance Committee..

Genet Med. 2015 May;17(5):405-24. doi: 10.1038/gim.2015.30. Epub 2015 Mar 5.

PubMed [citation]

PMID:: 25741868
PMCID:: PMC4544753

Details of each submission

From Invitae, SCV000649784.6

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (1)

Description

This sequence change replaces tyrosine, which is neutral and polar, with cysteine, which is neutral and slightly polar, at codon 310 of the SGCA protein (p.Tyr310Cys). This variant is present in population databases (rs145252144, gnomAD 0.2%). This variant has not been reported in the literature in individuals affected with SGCA-related conditions. ClinVar contains an entry for this variant (Variation ID: 282511). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt SGCA protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Natera, Inc., SCV002087584.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	not provided

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Revvity Omics, Revvity, SCV003827567.2

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (1)

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Genome-Nilou Lab, SCV003931705.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (1)

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: Mar 16, 2024

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