Genetic Variant PIK3CB:p.Ala830Val (chr3-138681982-G-A) – ACMG Classification: Likely_benign (-5 pts)

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4BS2

The NM_006219.3(PIK3CB):c.2489C>T(p.Ala830Val) variant causes a missense change. The variant allele was found at a frequency of 0.00000624 in 1,603,258 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 Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000055 ( 0 hom. )

Consequence

PIK3CB
NM_006219.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.93

Variant links:

Genes affected

PIK3CB (HGNC:8976): (phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit beta) This gene encodes an isoform of the catalytic subunit of phosphoinositide 3-kinase (PI3K). These kinases are important in signaling pathways involving receptors on the outer membrane of eukaryotic cells and are named for their catalytic subunit. The encoded protein is the catalytic subunit for PI3Kbeta (PI3KB). PI3KB has been shown to be part of the activation pathway in neutrophils which have bound immune complexes at sites of injury or infection. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2011]

PIK3CB links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.30779415).

BS2

High AC in GnomAdExome4 at 8 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PIK3CB	NM_006219.3 link	c.2489C>T	p.Ala830Val	missense_variant	Exon 19 of 24	ENST00000674063.1	NP_006210.1	P42338

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PIK3CB	ENST00000674063.1 link	c.2489C>T	p.Ala830Val	missense_variant	Exon 19 of 24		NM_006219.3	ENSP00000501150.1		P42338

Frequencies

GnomAD3 genomes

AF:

0.0000133

AC:

AN:

150856

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000132

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000286

AC:

AN:

244526

Hom.:

AF XY:

0.0000227

AC XY:

AN XY:

131912

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000209

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000551

AC:

AN:

1452402

Hom.:

Cov.:

AF XY:

0.00000554

AC XY:

AN XY:

722230

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000184

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000133

AC:

AN:

150856

Hom.:

Cov.:

AF XY:

0.0000136

AC XY:

AN XY:

73514

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000132

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 22, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.2489C>T (p.A830V) alteration is located in exon 17 (coding exon 17) of the PIK3CB gene. This alteration results from a C to T substitution at nucleotide position 2489, causing the alanine (A) at amino acid position 830 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.23

BayesDel_addAF

Benign

-0.16

BayesDel_noAF

Benign

-0.20

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.42

T;T;.

Eigen

Uncertain

0.45

Eigen_PC

Uncertain

0.52

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.97

D;.;D

M_CAP

Benign

0.029

MetaRNN

Benign

0.31

T;T;T

MetaSVM

Uncertain

-0.24

MutationAssessor

Benign

1.2

L;L;.

PrimateAI

Uncertain

0.72

PROVEAN

Benign

-1.7

N;N;N

REVEL

Uncertain

0.35

Sift

Uncertain

0.010

D;D;D

Sift4G

Uncertain

0.013

D;D;T

Polyphen

0.94

P;P;P

Vest4

0.62

MutPred

0.56

Gain of ubiquitination at K828 (P = 0.1222);Gain of ubiquitination at K828 (P = 0.1222);.;

MVP

0.51

MPC

0.56

ClinPred

0.25

GERP RS

5.4

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.37

gMVP

0.78

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

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