NM_015192.4:c.2570C>T

Variant names:

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_StrongBP6BS1

The NM_015192.4(PLCB1):c.2570C>T(p.Thr857Met) variant causes a missense change. The variant allele was found at a frequency of 0.000093 in 1,613,114 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T857A) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00033 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000068 ( 0 hom. )

Consequence

PLCB1
NM_015192.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:2

Conservation

PhyloP100: 6.53

Publications

5 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:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.012350529).

BP6

Variant 20-8757092-C-T is Benign according to our data. Variant chr20-8757092-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 339511.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.000335 (51/152256) while in subpopulation AFR AF = 0.000842 (35/41552). AF 95% confidence interval is 0.000622. There are 0 homozygotes in GnomAd4. There are 28 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015192.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PLCB1	NM_015192.4	MANE Select	c.2570C>T	p.Thr857Met	missense	Exon 24 of 32	NP_056007.1
	PLCB1	NM_182734.3		c.2570C>T	p.Thr857Met	missense	Exon 24 of 33	NP_877398.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
PLCB1	ENST00000338037.11	TSL:1 MANE Select	c.2570C>T	p.Thr857Met	missense	Exon 24 of 32	ENSP00000338185.6
PLCB1	ENST00000378637.6	TSL:1	c.2570C>T	p.Thr857Met	missense	Exon 24 of 32	ENSP00000367904.2
PLCB1	ENST00000378641.7	TSL:1	c.2570C>T	p.Thr857Met	missense	Exon 24 of 33	ENSP00000367908.3

Frequencies

GnomAD3 genomes

AF:

0.000316

AC:

AN:

152138

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000772

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000393

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000415

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00143

GnomAD2 exomes

AF:

0.0000916

AC:

AN:

250974

AF XY:

0.0000885

show subpopulations

Gnomad AFR exome

AF:

0.000616

Gnomad AMR exome

AF:

0.000145

Gnomad ASJ exome

AF:

0.0000993

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000441

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000678

AC:

AN:

1460858

Hom.:

Cov.:

AF XY:

0.0000729

AC XY:

AN XY:

726754

show subpopulations

African (AFR)

AF:

0.00155

AC:

AN:

33456

American (AMR)

AF:

0.000134

AC:

AN:

44684

Ashkenazi Jewish (ASJ)

AF:

0.0000383

AC:

AN:

26114

East Asian (EAS)

AF:

0.00

AC:

AN:

39690

South Asian (SAS)

AF:

0.0000464

AC:

AN:

86152

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53398

Middle Eastern (MID)

AF:

0.000174

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.0000207

AC:

AN:

1111262

Other (OTH)

AF:

0.000199

AC:

AN:

60340

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.479

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000335

AC:

AN:

152256

Hom.:

Cov.:

AF XY:

0.000376

AC XY:

AN XY:

74454

show subpopulations

African (AFR)

AF:

0.000842

AC:

AN:

41552

American (AMR)

AF:

0.000392

AC:

AN:

15296

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5176

South Asian (SAS)

AF:

0.000415

AC:

AN:

4814

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10612

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000735

AC:

AN:

68020

Other (OTH)

AF:

0.00142

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.463

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<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:

0.000159

Hom.:

Bravo

AF:

0.000385

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000123

AC:

Asia WGS

AF:

0.000866

AC:

AN:

3478

ClinVar

ClinVar submissions as Germline

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Developmental and epileptic encephalopathy, 12 (2)

Early Infantile Epileptic Encephalopathy, Autosomal Recessive (1)

Inborn genetic diseases (1)

not provided (1)

See cases (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.071

BayesDel_addAF

Benign

-0.47

BayesDel_noAF

Benign

-0.55

CADD

Benign

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.24

Eigen

Benign

-0.14

Eigen_PC

Benign

-0.040

FATHMM_MKL

Uncertain

0.85

LIST_S2

Uncertain

0.91

M_CAP

Benign

0.0071

MetaRNN

Benign

0.012

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.0

PhyloP100

6.5

PrimateAI

Benign

0.43

PROVEAN

Benign

-0.80

REVEL

Benign

0.039

Sift

Benign

0.10

Sift4G

Benign

0.10

Polyphen

0.80

Vest4

0.19

MVP

0.31

MPC

0.33

ClinPred

0.027

GERP RS

4.7

Varity_R

0.053

gMVP

0.19

Mutation Taster

=91/9

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

ClinVar submissions as Germline

Computational scores

Splicing

Publications

Other links and lift over