Genetic Variant PLPP2:p.Met57Val (chr19-288055-T-C) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PVS1_SupportingPM2

The NM_177526.3(PLPP2):c.1A>G(p.Met1?) variant causes a start lost change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000434 in 1,612,638 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000041 ( 0 hom. )

Consequence

PLPP2
NM_177526.3 start_lost

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.739

Variant links:

Genes affected

PLPP2 (HGNC:9230): (phospholipid phosphatase 2) The protein encoded by this gene is a member of the phosphatidic acid phosphatase (PAP) family. PAPs convert phosphatidic acid to diacylglycerol, and function in de novo synthesis of glycerolipids as well as in receptor-activated signal transduction mediated by phospholipase D. This protein is similar to phosphatidic acid phosphatase type 2A (PPAP2A) and type 2B (PPAP2B). All three proteins contain 6 transmembrane regions, and a consensus N-glycosylation site. This protein has been shown to possess membrane associated PAP activity. Three alternatively spliced transcript variants encoding distinct isoforms have been reported. [provided by RefSeq, Jul 2008]

PLPP2 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PVS1

Start lost variant, no pathogenic variants between lost start and next in-frame start position. Next in-frame start position is after 63 codons. Genomic position: 287601. Lost 0.268 part of the original CDS.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PLPP2	NM_003712.4 link	c.169A>G	p.Met57Val	missense_variant	Exon 2 of 6	ENST00000434325.7	NP_003703.1	O43688-1
PLPP2	NM_177526.3 link	c.1A>G	p.Met1?	start_lost	Exon 2 of 6		NP_803545.1	O43688-3
PLPP2	NM_177543.3 link	c.232A>G	p.Met78Val	missense_variant	Exon 2 of 6		NP_808211.1	O43688-2
PLPP2	XM_011528396.3 link	c.187A>G	p.Met63Val	missense_variant	Exon 2 of 6		XP_011526698.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PLPP2	ENST00000434325.7 link	c.169A>G	p.Met57Val	missense_variant	Exon 2 of 6	1	NM_003712.4	ENSP00000388565.2		O43688-1

Frequencies

GnomAD3 genomes

AF:

0.00000659

AC:

AN:

151852

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000411

AC:

AN:

1460786

Hom.:

Cov.:

AF XY:

0.00000550

AC XY:

AN XY:

726722

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000270

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000659

AC:

AN:

151852

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74172

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Nov 10, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.232A>G (p.M78V) alteration is located in exon 2 (coding exon 2) of the PLPP2 gene. This alteration results from a A to G substitution at nucleotide position 232, causing the methionine (M) at amino acid position 78 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.47

BayesDel_addAF

Benign

-0.010

BayesDel_noAF

Benign

-0.25

CADD

Benign

DANN

Benign

0.90

DEOGEN2

Benign

0.11

.;T;.;.;T

Eigen

Benign

-0.68

Eigen_PC

Benign

-0.69

FATHMM_MKL

Uncertain

0.78

LIST_S2

Benign

0.86

D;D;D;D;D

M_CAP

Benign

0.067

MetaRNN

Benign

0.17

T;T;T;T;T

MetaSVM

Benign

-0.86

PrimateAI

Uncertain

0.51

PROVEAN

Benign

-1.9

N;.;N;.;.

REVEL

Benign

0.061

Sift

Uncertain

0.013

D;.;D;.;.

Sift4G

Uncertain

0.018

D;D;D;D;.

Polyphen

0.16

B;B;.;.;.

Vest4

0.69

MutPred

0.41

.;Gain of helix (P = 0.0696);.;.;.;

MVP

0.65

MPC

0.40

ClinPred

0.12

GERP RS

-1.9

Varity_R

0.24

gMVP

0.86

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