chr20-8132679-G-T

Position:

chr20-8132679-G-T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 1P and 13B. PP2BP4_StrongBP6BS1BS2

The NM_015192.4(PLCB1):c.28G>T(p.Ala10Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000291 in 1,612,474 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00031 ( 4 hom. )

Consequence

PLCB1
NM_015192.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:3

Conservation

PhyloP100: 8.49

Variant links:

Genes affected

PLCB1 (HGNC:15917): (phospholipase C beta 1) The protein encoded by this gene catalyzes the formation of inositol 1,4,5-trisphosphate and diacylglycerol from phosphatidylinositol 4,5-bisphosphate. This reaction uses calcium as a cofactor and plays an important role in the intracellular transduction of many extracellular signals. This gene is activated by two G-protein alpha subunits, alpha-q and alpha-11. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

PLCB1 links:

PLCB1 (HGNC:):

PLCB1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -12 ACMG points.

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), PLCB1. . Gene score misZ 3.8345 (greater than the threshold 3.09). Trascript score misZ 3.6982 (greater than threshold 3.09). GenCC has associacion of gene with developmental and epileptic encephalopathy, 12, malignant migrating partial seizures of infancy, developmental and epileptic encephalopathy, West syndrome.

BP4

Computational evidence support a benign effect (MetaRNN=0.041476816).

BP6

Variant 20-8132679-G-T is Benign according to our data. Variant chr20-8132679-G-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 410075.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=2}.

BS1

Variant frequency is greater than expected in population sas. gnomad4 allele frequency = 0.000131 (20/152168) while in subpopulation SAS AF= 0.00062 (3/4836). AF 95% confidence interval is 0.000169. There are 0 homozygotes in gnomad4. There are 13 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome4 at 4 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PLCB1	NM_015192.4 linkuse as main transcript	c.28G>T	p.Ala10Ser	missense_variant	1/32	ENST00000338037.11	NP_056007.1	Q9NQ66-1
PLCB1	NM_182734.3 linkuse as main transcript	c.28G>T	p.Ala10Ser	missense_variant	1/33		NP_877398.1	Q9NQ66-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PLCB1	ENST00000338037.11 linkuse as main transcript	c.28G>T	p.Ala10Ser	missense_variant	1/32	1	NM_015192.4	ENSP00000338185.6		Q9NQ66-1

Frequencies

GnomAD3 genomes

AF:

0.000131

AC:

AN:

152168

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000620

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000235

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000319

AC:

AN:

247682

Hom.:

AF XY:

0.000461

AC XY:

AN XY:

134598

show subpopulations

Gnomad AFR exome

AF:

0.0000629

Gnomad AMR exome

AF:

0.0000292

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00190

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000162

Gnomad OTH exome

AF:

0.000166

GnomAD4 exome

AF:

0.000307

AC:

449

AN:

1460306

Hom.:

Cov.:

AF XY:

0.000377

AC XY:

274

AN XY:

726536

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.0000672

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00202

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000231

Gnomad4 OTH exome

AF:

0.000199

GnomAD4 genome

AF:

0.000131

AC:

AN:

152168

Hom.:

Cov.:

AF XY:

0.000175

AC XY:

AN XY:

74342

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000620

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000235

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000230

Hom.:

Bravo

AF:

0.000170

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000349

AC:

ExAC

AF:

0.000330

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000237

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Developmental and epileptic encephalopathy, 12

Uncertain:1Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Center for Genomics, Ann and Robert H. Lurie Children's Hospital of Chicago	Mar 30, 2021	PLCB1 NM_015192.3 exon 1 p.Ala10Ser (c.28G>T): This variant has not been reported in the literature but is present in 0.02% (16/64558) of European alleles in the Genome Aggregation Database (https://gnomad.broadinstitute.org/variant/20-8132679-G-T?dataset=gnomad_r3). This variant is present in ClinVar (Variation ID:410075). Evolutionary conservation suggests that this variant may impact the protein; computational predictive tools for this variant are unclear. In summary, data on this variant is insufficient for disease classification. Therefore, the clinical significance of this variant is uncertain. -
Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 22, 2024	- -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 18, 2017

The p.A10S variant (also known as c.28G>T), located in coding exon 1 of the PLCB1 gene, results from a G to T substitution at nucleotide position 28. The alanine at codon 10 is replaced by serine, an amino acid with similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

not provided

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

Jan 13, 2025

See Variant Classification Assertion Criteria. -

PLCB1-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jun 28, 2022

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.30

BayesDel_addAF

Benign

-0.37

BayesDel_noAF

Benign

-0.31

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.25

.;T;.;.;.

Eigen

Uncertain

0.57

Eigen_PC

Uncertain

0.60

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.90

.;D;D;D;D

M_CAP

Uncertain

0.27

MetaRNN

Benign

0.041

T;T;T;T;T

MetaSVM

Benign

-0.85

MutationAssessor

Benign

1.7

L;L;.;.;L

PrimateAI

Pathogenic

0.84

PROVEAN

Benign

-0.75

N;N;.;.;N

REVEL

Benign

0.14

Sift

Benign

0.11

T;T;.;.;T

Sift4G

Benign

0.32

T;T;D;D;T

Polyphen

1.0

D;P;.;.;D

Vest4

0.43

MVP

0.37

MPC

0.095

ClinPred

0.093

GERP RS

4.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.21

gMVP

0.30

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