NM_020376.4:c.1327C>G

Variant names:

Variant summary

Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2

The NM_020376.4(PNPLA2):c.1327C>G(p.Leu443Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000362 in 1,597,054 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0019 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00020 ( 3 hom. )

Consequence

PNPLA2
NM_020376.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:3

Conservation

PhyloP100: 2.47

Variant links:

Genes affected

PNPLA2 (HGNC:30802): (patatin like phospholipase domain containing 2) This gene encodes an enzyme which catalyzes the first step in the hydrolysis of triglycerides in adipose tissue. Mutations in this gene are associated with neutral lipid storage disease with myopathy. [provided by RefSeq, Jul 2010]

PNPLA2 links:

ENSG00000255108 (HGNC:):

ENSG00000255108 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -13 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.010249078).

BP6

Variant 11-824674-C-G is Benign according to our data. Variant chr11-824674-C-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 261232.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=3, Uncertain_significance=1}.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00187 (285/152272) while in subpopulation AFR AF= 0.00666 (277/41570). AF 95% confidence interval is 0.00602. There are 0 homozygotes in gnomad4. There are 147 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome4 at 3 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PNPLA2	NM_020376.4 link	c.1327C>G	p.Leu443Val	missense_variant	Exon 10 of 10	ENST00000336615.9	NP_065109.1	Q96AD5-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PNPLA2	ENST00000336615.9 link	c.1327C>G	p.Leu443Val	missense_variant	Exon 10 of 10	1	NM_020376.4	ENSP00000337701.4		Q96AD5-1

Frequencies

GnomAD3 genomes

AF:

0.00188

AC:

286

AN:

152164

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00668

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000458

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:

0.000478

GnomAD3 exomes

AF:

0.000392

AC:

AN:

219204

Hom.:

AF XY:

0.000328

AC XY:

AN XY:

121834

show subpopulations

Gnomad AFR exome

AF:

0.00555

Gnomad AMR exome

AF:

0.000269

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000582

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000203

AC:

293

AN:

1444782

Hom.:

Cov.:

AF XY:

0.000156

AC XY:

112

AN XY:

719024

show subpopulations

Gnomad4 AFR exome

AF:

0.00759

Gnomad4 AMR exome

AF:

0.000249

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000234

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000180

Gnomad4 OTH exome

AF:

0.000400

GnomAD4 genome

AF:

0.00187

AC:

285

AN:

152272

Hom.:

Cov.:

AF XY:

0.00197

AC XY:

147

AN XY:

74442

show subpopulations

Gnomad4 AFR

AF:

0.00666

Gnomad4 AMR

AF:

0.000392

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:

0.000473

Alfa

AF:

0.000539

Hom.:

Bravo

AF:

0.00209

ESP6500AA

AF:

0.00254

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000495

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3470

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Neutral lipid storage myopathy

Benign:2

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

Jan 24, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Inborn genetic diseases

Uncertain:1

Sep 17, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1327C>G (p.L443V) alteration is located in exon 10 (coding exon 9) of the PNPLA2 gene. This alteration results from a C to G substitution at nucleotide position 1327, causing the leucine (L) at amino acid position 443 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not specified

Benign:1

PreventionGenetics, part of Exact Sciences

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.38

BayesDel_noAF

Benign

-0.32

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.36

Eigen

Uncertain

0.36

Eigen_PC

Uncertain

0.30

FATHMM_MKL

Uncertain

0.86

LIST_S2

Uncertain

0.91

MetaRNN

Benign

0.010

MetaSVM

Benign

-0.84

MutationAssessor

Benign

1.8

PrimateAI

Uncertain

0.64

PROVEAN

Benign

-0.62

REVEL

Benign

0.12

Sift

Pathogenic

0.0

Sift4G

Uncertain

0.011

Polyphen

1.0

Vest4

0.36

MVP

0.53

MPC

0.75

ClinPred

0.065

GERP RS

3.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.26

gMVP

0.50

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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