Genetic Variant PLCB1:c.246+88413C>A (chr20-8459863-C-A) – ACMG Classification: Benign (-12 pts)

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_StrongBA1

The NM_015192.4(PLCB1):c.246+88413C>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0351 in 152,190 control chromosomes in the GnomAD database, including 332 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.035 ( 332 hom., cov: 33)

Consequence

PLCB1
NM_015192.4 intron

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.153

Publications

1 publications found

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 Gene-Disease associations (from GenCC):

genetic developmental and epileptic encephalopathy
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
developmental and epileptic encephalopathy, 12
Inheritance: AR Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
infantile spasms
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
malignant migrating partial seizures of infancy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

PLCB1 links:

LOC124900459 (HGNC:):

LOC124900459 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -12 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.84).

BA1

GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.118 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	Exon rank	MANE	Protein
PLCB1	NM_015192.4 link	c.246+88413C>A	intron_variant	Intron 3 of 31	ENST00000338037.11	NP_056007.1
LOC124900459	XR_007067518.1 link	n.43629C>A	non_coding_transcript_exon_variant	Exon 2 of 2
PLCB1	NM_182734.3 link	c.246+88413C>A	intron_variant	Intron 3 of 32		NP_877398.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PLCB1	ENST00000338037.11 link	c.246+88413C>A		intron_variant	Intron 3 of 31	1	NM_015192.4	ENSP00000338185.6

Frequencies

GnomAD3 genomes

AF:

0.0350

AC:

5327

AN:

152072

Hom.:

328

Cov.:

show subpopulations

Gnomad AFR

AF:

0.121

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0143

Gnomad ASJ

AF:

0.00173

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000500

Gnomad OTH

AF:

0.0297

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome

AF:

0.0351

AC:

5349

AN:

152190

Hom.:

332

Cov.:

AF XY:

0.0339

AC XY:

2524

AN XY:

74400

show subpopulations

African (AFR)

AF:

0.121

AC:

5028

AN:

41508

American (AMR)

AF:

0.0143

AC:

219

AN:

15282

Ashkenazi Jewish (ASJ)

AF:

0.00173

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5176

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10612

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000500

AC:

AN:

67996

Other (OTH)

AF:

0.0294

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

242

484

725

967

1209

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

104

156

208

260

<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:

0.0280

Hom.:

Bravo

AF:

0.0396

Asia WGS

AF:

0.00549

AC:

AN:

3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.84

CADD

Benign

2.9

(source)

DANN

Benign

0.65

PhyloP100

0.15

Mutation Taster

=100/0

polymorphism (auto)

(source)

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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over