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NM_000405.5(GM2A):c.178G>A (p.Val60Ile) AND Tay-Sachs disease, variant AB

Germline classification:
Uncertain significance (1 submission)
Last evaluated:
Aug 31, 2021
Review status:
1 star out of maximum of 4 stars
criteria provided, single submitter
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:
RCV001936195.5

Allele description [Variation Report for NM_000405.5(GM2A):c.178G>A (p.Val60Ile)]

NM_000405.5(GM2A):c.178G>A (p.Val60Ile)

Gene:
GM2A:ganglioside GM2 activator [Gene - OMIM - HGNC]
Variant type:
single nucleotide variant
Cytogenetic location:
5q33.1
Genomic location:
Preferred name:
NM_000405.5(GM2A):c.178G>A (p.Val60Ile)
HGVS:
  • NC_000005.10:g.151259851G>A
  • NG_009059.1:g.11800G>A
  • NM_000405.5:c.178G>AMANE SELECT
  • NM_001167607.3:c.178G>A
  • NP_000396.2:p.Val60Ile
  • NP_001161079.1:p.Val60Ile
  • NC_000005.9:g.150639412G>A
Protein change:
V60I
Links:
dbSNP: rs201829650
NCBI 1000 Genomes Browser:
rs201829650
Molecular consequence:
  • NM_000405.5:c.178G>A - missense variant - [Sequence Ontology: SO:0001583]
  • NM_001167607.3:c.178G>A - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:
Tay-Sachs disease, variant AB
Synonyms:
Gm2-gangliosidosis, ab variant
Identifiers:
MONDO: MONDO:0010099; MedGen: C0268275; Orphanet: 309246; OMIM: 272750

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Assertion and evidence details

Help
Submission AccessionSubmitterReview Status
(Assertion method)		Clinical Significance
(Last evaluated)		OriginMethodCitations
SCV002201632Labcorp Genetics (formerly Invitae), Labcorp
criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))		Uncertain significance
(Aug 31, 2021) 		germlineclinical testing

PubMed (1)
[See all records that cite this PMID]

Help

Summary from all submissions

EthnicityOriginAffectedIndividualsFamiliesChromosomes testedNumber TestedFamily historyMethod
not providedgermlineunknownnot providednot providednot providednot providednot providedclinical 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

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV002201632.2

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testing PubMed (1)

Description

This sequence change replaces valine with isoleucine at codon 60 of the GM2A protein (p.Val60Ile). The valine residue is weakly conserved and there is a small physicochemical difference between valine and isoleucine. This variant is present in population databases (rs201829650, ExAC 0.01%). This variant has not been reported in the literature in individuals affected with GM2A-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The isoleucine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect 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.

#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineunknownnot providednot providednot providednot providednot providednot providednot provided

Last Updated: Sep 29, 2024