Genetic Variant PLCG2:p.Tyr206Cys (chr16-81870904-A-G) – ACMG Classification: Likely_pathogenic (6 pts)

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2PP3_Strong

The NM_002661.5(PLCG2):c.617A>G(p.Tyr206Cys) variant causes a missense change. The variant allele was found at a frequency of 0.00000207 in 1,448,948 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Y206F) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

PLCG2
NM_002661.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 6.06

Publications

3 publications found

Variant links:

Genes affected

PLCG2 (HGNC:9066): (phospholipase C gamma 2) The protein encoded by this gene is a transmembrane signaling enzyme that catalyzes the conversion of 1-phosphatidyl-1D-myo-inositol 4,5-bisphosphate to 1D-myo-inositol 1,4,5-trisphosphate (IP3) and diacylglycerol (DAG) using calcium as a cofactor. IP3 and DAG are second messenger molecules important for transmitting signals from growth factor receptors and immune system receptors across the cell membrane. Mutations in this gene have been found in autoinflammation, antibody deficiency, and immune dysregulation syndrome and familial cold autoinflammatory syndrome 3. [provided by RefSeq, Mar 2014]

PLCG2 Gene-Disease associations (from GenCC):

autoinflammation-PLCG2-associated antibody deficiency-immune dysregulation
Inheritance: AD Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, Orphanet, G2P
familial cold autoinflammatory syndrome 3
Inheritance: AD Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), G2P

PLCG2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.954

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PLCG2	NM_002661.5 link	c.617A>G	p.Tyr206Cys	missense_variant	Exon 7 of 33	ENST00000564138.6	NP_002652.2	P16885
PLCG2	NM_001425749.1 link	c.617A>G	p.Tyr206Cys	missense_variant	Exon 8 of 34		NP_001412678.1
PLCG2	NM_001425750.1 link	c.617A>G	p.Tyr206Cys	missense_variant	Exon 7 of 33		NP_001412679.1
PLCG2	NM_001425751.1 link	c.617A>G	p.Tyr206Cys	missense_variant	Exon 8 of 34		NP_001412680.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PLCG2	ENST00000564138.6 link	c.617A>G	p.Tyr206Cys	missense_variant	Exon 7 of 33	1	NM_002661.5	ENSP00000482457.1		P16885

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000825

AC:

AN:

242356

AF XY:

0.00000760

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000470

Gnomad NFE exome

AF:

0.00000896

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000207

AC:

AN:

1448948

Hom.:

Cov.:

AF XY:

0.00000139

AC XY:

AN XY:

721168

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33112

American (AMR)

AF:

0.00

AC:

AN:

42936

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25986

East Asian (EAS)

AF:

0.00

AC:

AN:

39274

South Asian (SAS)

AF:

0.00

AC:

AN:

84490

European-Finnish (FIN)

AF:

0.0000188

AC:

AN:

53142

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5746

European-Non Finnish (NFE)

AF:

0.00000181

AC:

AN:

1104360

Other (OTH)

AF:

0.00

AC:

AN:

59902

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

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

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ExAC

AF:

0.00000828

AC:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.23

BayesDel_addAF

Uncertain

0.11

BayesDel_noAF

Uncertain

-0.070

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.87

D;.

Eigen

Uncertain

0.65

Eigen_PC

Uncertain

0.63

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.94

D;D

M_CAP

Benign

0.067

MetaRNN

Pathogenic

0.95

D;D

MetaSVM

Benign

-0.79

MutationAssessor

Uncertain

2.6

M;.

PhyloP100

6.1

PrimateAI

Uncertain

0.76

PROVEAN

Pathogenic

-8.2

.;D

REVEL

Uncertain

0.40

Sift

Uncertain

0.0010

.;D

Sift4G

Uncertain

0.0030

D;D

Polyphen

1.0

D;.

Vest4

0.91

MutPred

0.83

Gain of methylation at K207 (P = 0.0149);Gain of methylation at K207 (P = 0.0149);

MVP

0.62

MPC

0.43

ClinPred

0.99

GERP RS

5.4

Varity_R

0.80

gMVP

0.78

Mutation Taster

=78/22

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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over