3-179219217-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -19 ACMG points: 0P and 19B. BP4_ModerateBP6_Very_StrongBP7BS1BS2

The NM_006218.4(PIK3CA):c.1686C>T(p.Pro562Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000393 in 1,601,978 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000041 ( 0 hom. )

Consequence

PIK3CA
NM_006218.4 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: -0.0630

Publications

3 publications found

Variant links:

Genes affected

PIK3CA (HGNC:8975): (phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha) Phosphatidylinositol 3-kinase is composed of an 85 kDa regulatory subunit and a 110 kDa catalytic subunit. The protein encoded by this gene represents the catalytic subunit, which uses ATP to phosphorylate PtdIns, PtdIns4P and PtdIns(4,5)P2. This gene has been found to be oncogenic and has been implicated in cervical cancers. A pseudogene of this gene has been defined on chromosome 22. [provided by RefSeq, Apr 2016]

PIK3CA Gene-Disease associations (from GenCC):

overgrowth syndrome and/or cerebral malformations due to abnormalities in MTOR pathway genes
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
megalencephaly-capillary malformation-polymicrogyria syndrome
Inheritance: AD Classification: STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), Genomics England PanelApp
vascular malformation
Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
Cowden disease
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Cowden syndrome 5
Inheritance: AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)
familial ovarian cancer
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
hereditary breast carcinoma
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

PIK3CA links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -19 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.27).

BP6

Variant 3-179219217-C-T is Benign according to our data. Variant chr3-179219217-C-T is described in CliVar as Benign/Likely_benign. Clinvar id is 456532.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr3-179219217-C-T is described in CliVar as Benign/Likely_benign. Clinvar id is 456532.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr3-179219217-C-T is described in CliVar as Benign/Likely_benign. Clinvar id is 456532.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr3-179219217-C-T is described in CliVar as Benign/Likely_benign. Clinvar id is 456532.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr3-179219217-C-T is described in CliVar as Benign/Likely_benign. Clinvar id is 456532.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr3-179219217-C-T is described in CliVar as Benign/Likely_benign. Clinvar id is 456532.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr3-179219217-C-T is described in CliVar as Benign/Likely_benign. Clinvar id is 456532.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr3-179219217-C-T is described in CliVar as Benign/Likely_benign. Clinvar id is 456532.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-0.063 with no splicing effect.

BS1

Variant frequency is greater than expected in population nfe. GnomAdExome4 allele frequency = 0.0000414 (60/1450028) while in subpopulation NFE AF = 0.0000408 (45/1101866). AF 95% confidence interval is 0.0000311. There are 0 homozygotes in GnomAdExome4. There are 26 alleles in the male GnomAdExome4 subpopulation. Median coverage is 27. This position passed quality control check.

BS2

High AC in GnomAdExome4 at 60 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PIK3CA	NM_006218.4 link	c.1686C>T	p.Pro562Pro	synonymous_variant	Exon 11 of 21	ENST00000263967.4	NP_006209.2	P42336Q4LE51
PIK3CA	XM_006713658.5 link	c.1686C>T	p.Pro562Pro	synonymous_variant	Exon 11 of 21		XP_006713721.1	P42336Q4LE51

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PIK3CA	ENST00000263967.4 link	c.1686C>T	p.Pro562Pro	synonymous_variant	Exon 11 of 21	2	NM_006218.4	ENSP00000263967.3		P42336

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

151950

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000945

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000295

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000925

AC:

AN:

248718

AF XY:

0.0000444

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000195

Gnomad OTH exome

AF:

0.000166

GnomAD4 exome

AF:

0.0000414

AC:

AN:

1450028

Hom.:

Cov.:

AF XY:

0.0000360

AC XY:

AN XY:

722212

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33160

American (AMR)

AF:

0.00

AC:

AN:

44616

Ashkenazi Jewish (ASJ)

AF:

0.0000385

AC:

AN:

25982

East Asian (EAS)

AF:

0.00

AC:

AN:

39484

South Asian (SAS)

AF:

0.0000116

AC:

AN:

85916

European-Finnish (FIN)

AF:

0.000112

AC:

AN:

53352

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5736

European-Non Finnish (NFE)

AF:

0.0000408

AC:

AN:

1101866

Other (OTH)

AF:

0.000117

AC:

AN:

59916

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.431

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000197

AC:

AN:

151950

Hom.:

Cov.:

AF XY:

0.0000270

AC XY:

AN XY:

74200

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41404

American (AMR)

AF:

0.00

AC:

AN:

15240

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3466

East Asian (EAS)

AF:

0.00

AC:

AN:

5198

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.0000945

AC:

AN:

10586

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000295

AC:

AN:

67910

Other (OTH)

AF:

0.00

AC:

AN:

2088

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.508

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000135

Hom.:

Bravo

AF:

0.0000189

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Benign:1

Feb 15, 2022

Ambry Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

not provided

Benign:1

Aug 01, 2023

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

PIK3CA: BP4, BP7 -

Cowden syndrome 5

Benign:1

Feb 01, 2025

KCCC/NGS Laboratory, Kuwait Cancer Control Center

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Cowden syndrome

Benign:1

Dec 04, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.27

CADD

Benign

(source)

DANN

Benign

0.57

PhyloP100

-0.063

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over