U.S. flag

An official website of the United States government

NM_000521.4(HEXB):c.20G>A (p.Gly7Glu) AND Sandhoff disease

Germline classification:
Uncertain significance (1 submission)
Last evaluated:
Feb 24, 2022
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:
RCV002579001.2

Allele description [Variation Report for NM_000521.4(HEXB):c.20G>A (p.Gly7Glu)]

NM_000521.4(HEXB):c.20G>A (p.Gly7Glu)

Gene:
HEXB:hexosaminidase subunit beta [Gene - OMIM - HGNC]
Variant type:
single nucleotide variant
Cytogenetic location:
5q13.3
Genomic location:
Preferred name:
NM_000521.4(HEXB):c.20G>A (p.Gly7Glu)
HGVS:
  • NC_000005.10:g.74685280G>A
  • NG_009770.3:g.50259G>A
  • NG_105071.1:g.436G>A
  • NM_000521.3:c.20G>A
  • NM_000521.4:c.20G>AMANE SELECT
  • NM_001292004.2:c.-376-4048G>A
  • NP_000512.2:p.Gly7Glu
  • NC_000005.9:g.73981105G>A
  • NG_009770.2:g.50258G>A
Protein change:
G7E
Molecular consequence:
  • NM_001292004.2:c.-376-4048G>A - intron variant - [Sequence Ontology: SO:0001627]
  • NM_000521.4:c.20G>A - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:
Sandhoff disease
Synonyms:
GM2-GANGLIOSIDOSIS, TYPE II; HEXOSAMINIDASES A AND B DEFICIENCY; Beta-hexosaminidase-beta-subunit deficiency; See all synonyms [MedGen]
Identifiers:
MONDO: MONDO:0010006; MedGen: C0036161; Orphanet: 796; OMIM: 268800

Recent activity

Clear Turn Off Turn On

Your browsing activity is empty.

Activity recording is turned off.

Turn recording back on

See more...

Assertion and evidence details

Help
Submission AccessionSubmitterReview Status
(Assertion method)		Clinical Significance
(Last evaluated)		OriginMethodCitations
SCV003490359Labcorp Genetics (formerly Invitae), Labcorp
criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))		Uncertain significance
(Feb 24, 2022) 		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, SCV003490359.1

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

Description

This sequence change replaces glycine, which is neutral and non-polar, with glutamic acid, which is acidic and polar, at codon 7 of the HEXB protein (p.Gly7Glu). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This variant has not been reported in the literature in individuals affected with HEXB-related conditions. 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 not expected to disrupt HEXB 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