rs557471275

Positions:

chr1-9717032-T-C

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 1P and 3B. PP2BP4_ModerateBS1_Supporting

The NM_005026.5(PIK3CD):c.854T>C(p.Met285Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000122 in 1,613,854 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00016 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00012 ( 0 hom. )

Consequence

PIK3CD
NM_005026.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 2.65

Variant links:

Genes affected

PIK3CD (HGNC:8977): (phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit delta) Phosphoinositide 3-kinases (PI3Ks) phosphorylate inositol lipids and are involved in the immune response. The protein encoded by this gene is a class I PI3K found primarily in leukocytes. Like other class I PI3Ks (p110-alpha p110-beta, and p110-gamma), the encoded protein binds p85 adapter proteins and GTP-bound RAS. However, unlike the other class I PI3Ks, this protein phosphorylates itself, not p85 protein.[provided by RefSeq, Jul 2010]

PIK3CD links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), PIK3CD. . Gene score misZ 4.2747 (greater than the threshold 3.09). Trascript score misZ 6.3833 (greater than threshold 3.09). GenCC has associacion of gene with immunodeficiency 14b, autosomal recessive, immunodeficiency 14, activated PI3K-delta syndrome.

BP4

Computational evidence support a benign effect (MetaRNN=0.122813314).

BS1

Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.000158 (24/152254) while in subpopulation AMR AF= 0.000654 (10/15300). AF 95% confidence interval is 0.000354. There are 0 homozygotes in gnomad4. There are 11 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PIK3CD	NM_005026.5 linkuse as main transcript	c.854T>C	p.Met285Thr	missense_variant	7/24	ENST00000377346.9	NP_005017.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PIK3CD	ENST00000377346.9 linkuse as main transcript	c.854T>C	p.Met285Thr	missense_variant	7/24	1	NM_005026.5	ENSP00000366563	P3	O00329-1

Frequencies

GnomAD3 genomes

AF:

0.000158

AC:

AN:

152136

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000966

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000654

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:

0.000103

Gnomad OTH

AF:

0.00143

GnomAD3 exomes

AF:

0.000163

AC:

AN:

251356

Hom.:

AF XY:

0.000155

AC XY:

AN XY:

135880

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000463

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:

0.000220

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000118

AC:

173

AN:

1461600

Hom.:

Cov.:

AF XY:

0.000118

AC XY:

AN XY:

727104

show subpopulations

Gnomad4 AFR exome

AF:

0.0000597

Gnomad4 AMR exome

AF:

0.000358

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000138

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.000158

AC:

AN:

152254

Hom.:

Cov.:

AF XY:

0.000148

AC XY:

AN XY:

74458

show subpopulations

Gnomad4 AFR

AF:

0.0000963

Gnomad4 AMR

AF:

0.000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000103

Gnomad4 OTH

AF:

0.00142

Alfa

AF:

0.000193

Hom.:

Bravo

AF:

0.000155

ExAC

AF:

0.000132

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

See cases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratorio de Genetica e Diagnostico Molecular, Hospital Israelita Albert Einstein

Nov 25, 2019

ACMG classification criteria: PM2, BP4 -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

not provided

Breakthrough Genomics, Breakthrough Genomics

- -

Immunodeficiency 14

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Nov 27, 2023

This sequence change replaces methionine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 285 of the PIK3CD protein (p.Met285Thr). This variant is present in population databases (rs557471275, gnomAD 0.05%), and has an allele count higher than expected for a pathogenic variant. This variant has not been reported in the literature in individuals affected with PIK3CD-related conditions. ClinVar contains an entry for this variant (Variation ID: 541085). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt PIK3CD protein function with a negative predictive value of 80%. 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.27

BayesDel_addAF

Benign

-0.33

BayesDel_noAF

Benign

-0.38

CADD

Benign

DANN

Benign

0.87

DEOGEN2

Benign

0.27

Eigen

Benign

-0.18

Eigen_PC

Benign

0.0028

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Benign

0.85

M_CAP

Benign

0.012

MetaRNN

Benign

0.12

MetaSVM

Benign

-1.1

MutationAssessor

Benign

2.0

MutationTaster

Benign

1.0

D;D;N

PrimateAI

Uncertain

0.70

PROVEAN

Benign

-1.3

REVEL

Benign

0.071

Sift

Benign

0.29

Sift4G

Benign

0.40

Polyphen

0.24

Vest4

0.53

MVP

0.51

MPC

1.1

ClinPred

0.054

GERP RS

5.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.26

gMVP

0.66

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

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