Genetic Variant NM_000928.3:c.193A>G (chr12-120325862-T-C) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_000928.3(PLA2G1B):c.193A>G(p.Lys65Glu) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000411 in 1,461,568 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/23 in silico tools predict a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000041 ( 0 hom. )

Consequence

PLA2G1B
NM_000928.3 missense, splice_region

Scores

Splicing: ADA: 0.4079

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.79

Variant links:

Genes affected

PLA2G1B (HGNC:9030): (phospholipase A2 group IB) This gene encodes a secreted member of the phospholipase A2 (PLA2) class of enzymes, which is produced by the pancreatic acinar cells. The encoded calcium-dependent enzyme catalyzes the hydrolysis of the sn-2 position of membrane glycerophospholipids to release arachidonic acid (AA) and lysophospholipids. AA is subsequently converted by downstream metabolic enzymes to several bioactive lipophilic compounds (eicosanoids), including prostaglandins (PGs) and leukotrienes (LTs). The enzyme may be involved in several physiological processes including cell contraction, cell proliferation and pathological response. [provided by RefSeq, Aug 2013]

PLA2G1B links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.23878166).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PLA2G1B	NM_000928.3 link	c.193A>G	p.Lys65Glu	missense_variant, splice_region_variant	Exon 2 of 4	ENST00000308366.9	NP_000919.1	P04054

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
PLA2G1B	ENST00000308366.9 link	c.193A>G	p.Lys65Glu	missense_variant, splice_region_variant	Exon 2 of 4	1	NM_000928.3	ENSP00000312286.4	P04054
PLA2G1B	ENST00000423423.3 link	c.193A>G	p.Lys65Glu	missense_variant, splice_region_variant	Exon 2 of 3	1		ENSP00000413594.3	Q9BS22
PLA2G1B	ENST00000549767.1 link	c.106A>G	p.Lys36Glu	missense_variant, splice_region_variant	Exon 1 of 3	2		ENSP00000447233.1	F8W062

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000120

AC:

AN:

249998

Hom.:

AF XY:

0.0000148

AC XY:

AN XY:

135160

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000266

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000411

AC:

AN:

1461568

Hom.:

Cov.:

AF XY:

0.00000550

AC XY:

AN XY:

727074

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:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000450

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

Cov.:

Bravo

AF:

0.0000151

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Dec 17, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.193A>G (p.K65E) alteration is located in exon 2 (coding exon 2) of the PLA2G1B gene. This alteration results from a A to G substitution at nucleotide position 193, causing the lysine (K) at amino acid position 65 to be replaced by a glutamic acid (E). 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

Benign

0.14

BayesDel_addAF

Benign

-0.26

BayesDel_noAF

Benign

-0.51

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.26

T;T;T

Eigen

Benign

-0.47

Eigen_PC

Benign

-0.35

FATHMM_MKL

Uncertain

0.76

LIST_S2

Benign

0.81

T;T;T

M_CAP

Benign

0.021

MetaRNN

Benign

0.24

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.1

L;.;.

PrimateAI

Benign

0.22

PROVEAN

Benign

-1.6

N;N;N

REVEL

Benign

0.051

Sift

Uncertain

0.0070

D;D;D

Sift4G

Uncertain

0.0090

D;D;D

Polyphen

0.13

B;B;.

Vest4

0.15

MutPred

0.56

Loss of methylation at K65 (P = 0.0032);Loss of methylation at K65 (P = 0.0032);.;

MVP

0.27

MPC

0.083

ClinPred

0.25

GERP RS

3.0

Varity_R

0.61

gMVP

0.77

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.41

dbscSNV1_RF

Benign

0.39

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