Variant chr3-179219562-C-T details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 2P and 16B. PM2BP4_StrongBP6_Very_StrongBS1

The NM_006218.4(PIK3CA):c.1747-9C>T variant causes a splice polypyrimidine tract, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000492 in 1,308,342 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 0.00043 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00050 ( 0 hom. )

Consequence

PIK3CA
NM_006218.4 splice_polypyrimidine_tract, intron

Scores

Splicing: ADA: 0.00009997

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: 0.433

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -14 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.82).

BP6

Variant 3-179219562-C-T is Benign according to our data. Variant chr3-179219562-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 246679.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr3-179219562-C-T is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.000428 (65/151986) while in subpopulation NFE AF= 0.000795 (54/67930). AF 95% confidence interval is 0.000626. There are 0 homozygotes in gnomad4. There are 25 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PIK3CA	NM_006218.4 linkuse as main transcript	c.1747-9C>T		splice_polypyrimidine_tract_variant, intron_variant		ENST00000263967.4
PIK3CA	XM_006713658.5 linkuse as main transcript	c.1747-9C>T		splice_polypyrimidine_tract_variant, intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PIK3CA	ENST00000263967.4 linkuse as main transcript	c.1747-9C>T		splice_polypyrimidine_tract_variant, intron_variant		2	NM_006218.4	P1

Frequencies

GnomAD3 genomes

AF:

0.000428

AC:

AN:

151986

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000193

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000795

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.000384

AC:

AN:

234360

Hom.:

AF XY:

0.000407

AC XY:

AN XY:

127678

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000959

Gnomad ASJ exome

AF:

0.000109

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000104

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000773

Gnomad OTH exome

AF:

0.000177

GnomAD4 exome

AF:

0.000501

AC:

579

AN:

1156356

Hom.:

Cov.:

AF XY:

0.000544

AC XY:

320

AN XY:

588178

show subpopulations

Gnomad4 AFR exome

AF:

0.000148

Gnomad4 AMR exome

AF:

0.000120

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000231

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000633

Gnomad4 OTH exome

AF:

0.000340

GnomAD4 genome

AF:

0.000428

AC:

AN:

151986

Hom.:

Cov.:

AF XY:

0.000337

AC XY:

AN XY:

74218

show subpopulations

Gnomad4 AFR

AF:

0.000193

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000795

Gnomad4 OTH

AF:

0.000479

Alfa

AF:

0.00108

Hom.:

Bravo

AF:

0.000363

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Cowden syndrome 1

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Mendelics

May 28, 2019

- -

not provided

Benign:1

Benign, criteria provided, single submitter

clinical testing

GeneDx

Jun 25, 2020

- -

Cowden syndrome

Benign:1

Benign, criteria provided, single submitter

clinical testing

Invitae

Nov 18, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.82

CADD

Benign

DANN

Benign

0.44

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.00010

dbscSNV1_RF

Benign

0.0040

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over