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NM_006218.4(PIK3CA):c.181C>A (p.Leu61Ile) AND Cowden syndrome

Germline classification:
Uncertain significance (1 submission)
Last evaluated:
May 7, 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:
RCV002023689.5

Allele description

NM_006218.4(PIK3CA):c.181C>A (p.Leu61Ile)

Gene:
PIK3CA:phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha [Gene - OMIM - HGNC]
Variant type:
single nucleotide variant
Cytogenetic location:
3q26.32
Genomic location:
Preferred name:
NM_006218.4(PIK3CA):c.181C>A (p.Leu61Ile)
HGVS:
  • NC_000003.12:g.179199006C>A
  • NG_012113.2:g.55484C>A
  • NM_006218.4:c.181C>AMANE SELECT
  • NP_006209.2:p.Leu61Ile
  • LRG_310:g.55484C>A
  • NC_000003.11:g.178916794C>A
Protein change:
L61I
Links:
dbSNP: rs2108385717
NCBI 1000 Genomes Browser:
rs2108385717
Molecular consequence:
  • NM_006218.4:c.181C>A - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:
Cowden syndrome (CS)
Synonyms:
Cowden's disease; Cowden's syndrome; Cowden disease; See all synonyms [MedGen]
Identifiers:
MONDO: MONDO:0016063; MedGen: C0018553; Orphanet: 201; OMIM: PS158350

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Assertion and evidence details

Help
Submission AccessionSubmitterReview Status
(Assertion method)		Clinical Significance
(Last evaluated)		OriginMethodCitations
SCV002306770Invitae
criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))		Uncertain significance
(May 7, 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 Invitae, SCV002306770.3

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

Description

This sequence change replaces leucine with isoleucine at codon 61 of the PIK3CA protein (p.Leu61Ile). The leucine residue is highly conserved and there is a small physicochemical difference between leucine and isoleucine. 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: "Possibly Damaging"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals with PIK3CA-related conditions. This variant is not present in population databases (ExAC no frequency).

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

Last Updated: Apr 6, 2024