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NM_139058.3(ARX):c.773C>A (p.Ala258Glu) AND multiple conditions

Germline classification:
Uncertain significance (1 submission)
Last evaluated:
Oct 3, 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:
RCV001982356.3

Allele description [Variation Report for NM_139058.3(ARX):c.773C>A (p.Ala258Glu)]

NM_139058.3(ARX):c.773C>A (p.Ala258Glu)

Gene:
ARX:aristaless related homeobox [Gene - OMIM - HGNC]
Variant type:
single nucleotide variant
Cytogenetic location:
Xp21.3
Genomic location:
Preferred name:
NM_139058.3(ARX):c.773C>A (p.Ala258Glu)
HGVS:
  • NC_000023.11:g.25013222G>T
  • NG_008281.1:g.7727C>A
  • NM_139058.3:c.773C>AMANE SELECT
  • NP_620689.1:p.Ala258Glu
  • NC_000023.10:g.25031339G>T
Protein change:
A258E
Links:
dbSNP: rs759399062
NCBI 1000 Genomes Browser:
rs759399062
Molecular consequence:
  • NM_139058.3:c.773C>A - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:
Developmental and epileptic encephalopathy, 1 (DEE1)
Synonyms:
INFANTILE SPASM SYNDROME, X-LINKED 1; X-linked infantile spasms; West's syndrome; See all synonyms [MedGen]
Identifiers:
MONDO: MONDO:0010632; MedGen: C3463992; OMIM: 308350
Name:
Intellectual disability, X-linked, with or without seizures, arx-related (XLID29)
Synonyms:
MENTAL RETARDATION, X-LINKED 29; MENTAL RETARDATION, X-LINKED 32; MENTAL RETARDATION, X-LINKED 33; See all synonyms [MedGen]
Identifiers:
MONDO: MONDO:0010317; MedGen: C0796244; Orphanet: 777; OMIM: 300419

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Assertion and evidence details

Submission AccessionSubmitterReview Status
(Assertion method)
Clinical Significance
(Last evaluated)
OriginMethodCitations
SCV002225123Labcorp Genetics (formerly Invitae), Labcorp
criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))
Uncertain significance
(Oct 3, 2021)
germlineclinical testing

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

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, SCV002225123.2

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

Description

This sequence change replaces alanine with glutamic acid at codon 258 of the ARX protein (p.Ala258Glu). The alanine residue is weakly conserved and there is a moderate physicochemical difference between alanine and glutamic acid. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate insufficient coverage at this position in the ExAC database. This variant has not been reported in the literature in individuals affected with ARX-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 ARX 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: Oct 8, 2024