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NM_002641.4(PIGA):c.1063T>A (p.Leu355Met) AND Multiple congenital anomalies-hypotonia-seizures syndrome 2

Germline classification:
Uncertain significance (1 submission)
Last evaluated:
Aug 5, 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:
RCV002301078.4

Allele description [Variation Report for NM_002641.4(PIGA):c.1063T>A (p.Leu355Met)]

NM_002641.4(PIGA):c.1063T>A (p.Leu355Met)

Gene:
PIGA:phosphatidylinositol glycan anchor biosynthesis class A [Gene - OMIM - HGNC]
Variant type:
single nucleotide variant
Cytogenetic location:
Xp22.2
Genomic location:
Preferred name:
NM_002641.4(PIGA):c.1063T>A (p.Leu355Met)
HGVS:
  • NC_000023.11:g.15324790A>T
  • NG_009786.1:g.15749T>A
  • NM_002641.4:c.1063T>AMANE SELECT
  • NM_020473.3:c.361T>A
  • NP_002632.1:p.Leu355Met
  • NP_002632.1:p.Leu355Met
  • NP_065206.3:p.Leu121Met
  • LRG_160t1:c.1063T>A
  • LRG_160:g.15749T>A
  • LRG_160p1:p.Leu355Met
  • NC_000023.10:g.15342912A>T
  • NM_002641.3:c.1063T>A
  • NR_033835.1:n.805T>A
  • NR_033836.1:n.521T>A
Protein change:
L121M
Molecular consequence:
  • NM_002641.4:c.1063T>A - missense variant - [Sequence Ontology: SO:0001583]
  • NM_020473.3:c.361T>A - missense variant - [Sequence Ontology: SO:0001583]
  • NR_033835.1:n.805T>A - non-coding transcript variant - [Sequence Ontology: SO:0001619]
  • NR_033836.1:n.521T>A - non-coding transcript variant - [Sequence Ontology: SO:0001619]

Condition(s)

Name:
Multiple congenital anomalies-hypotonia-seizures syndrome 2 (MCAHS2)
Synonyms:
EPILEPTIC ENCEPHALOPATHY, EARLY INFANTILE, 20; GLYCOSYLPHOSPHATIDYLINOSITOL BIOSYNTHESIS DEFECT 4
Identifiers:
MONDO: MONDO:0010466; MedGen: C3275508; Orphanet: 300496; OMIM: 300868

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Assertion and evidence details

Help
Submission AccessionSubmitterReview Status
(Assertion method)		Clinical Significance
(Last evaluated)		OriginMethodCitations
SCV002592018Labcorp Genetics (formerly Invitae), Labcorp
criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))		Uncertain significance
(Aug 5, 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, SCV002592018.3

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

Description

This variant has not been reported in the literature in individuals affected with PIGA-related conditions. 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. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). This variant is present in population databases (no rsID available, gnomAD 0.004%). This sequence change replaces leucine, which is neutral and non-polar, with methionine, which is neutral and non-polar, at codon 355 of the PIGA protein (p.Leu355Met).

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

Last Updated: Sep 29, 2024