Variant 22-43923973-AC-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_025225.3(PNPLA3):c.64del(p.His22ThrfsTer8) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000475 in 1,585,044 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00036 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00049 ( 0 hom. )

Consequence

PNPLA3
NM_025225.3 frameshift

Scores

Not classified

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 0.0390

Variant links:

Genes affected

PNPLA3 (HGNC:18590): (patatin like phospholipase domain containing 3) The protein encoded by this gene is a triacylglycerol lipase that mediates triacylglycerol hydrolysis in adipocytes. The encoded protein, which appears to be membrane bound, may be involved in the balance of energy usage/storage in adipocytes. [provided by RefSeq, Jul 2008]

PNPLA3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PNPLA3	NM_025225.3 linkuse as main transcript	c.64del	p.His22ThrfsTer8	frameshift_variant	1/9	ENST00000216180.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PNPLA3	ENST00000216180.8 linkuse as main transcript	c.64del	p.His22ThrfsTer8	frameshift_variant	1/9	1	NM_025225.3	P1	Q9NST1-1
PNPLA3	ENST00000423180.2 linkuse as main transcript	c.64del	p.His22ThrfsTer8	frameshift_variant	1/9	2			Q9NST1-2
PNPLA3	ENST00000406117.6 linkuse as main transcript	c.64del	p.His22ThrfsTer8	frameshift_variant, NMD_transcript_variant	1/10	2

Frequencies

GnomAD3 genomes

AF:

0.000368

AC:

AN:

152134

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000965

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:

0.0000942

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000632

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000357

AC:

AN:

212712

Hom.:

AF XY:

0.000295

AC XY:

AN XY:

118746

show subpopulations

Gnomad AFR exome

AF:

0.0000890

Gnomad AMR exome

AF:

0.000769

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000822

Gnomad NFE exome

AF:

0.000458

Gnomad OTH exome

AF:

0.000751

GnomAD4 exome

AF:

0.000487

AC:

698

AN:

1432796

Hom.:

Cov.:

AF XY:

0.000484

AC XY:

345

AN XY:

713076

show subpopulations

Gnomad4 AFR exome

AF:

0.0000970

Gnomad4 AMR exome

AF:

0.000849

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000762

Gnomad4 NFE exome

AF:

0.000563

Gnomad4 OTH exome

AF:

0.000537

GnomAD4 genome

AF:

0.000361

AC:

AN:

152248

Hom.:

Cov.:

AF XY:

0.000363

AC XY:

AN XY:

74440

show subpopulations

Gnomad4 AFR

AF:

0.0000962

Gnomad4 AMR

AF:

0.000457

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000942

Gnomad4 NFE

AF:

0.000618

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000652

Hom.:

Bravo

AF:

0.000419

Asia WGS

AF:

0.000289

AC:

AN:

3476

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

not provided

Breakthrough Genomics, Breakthrough Genomics

- -

NAFLD1

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Nov 29, 2017

The PNPLA3 c.64delC (p.His22ThrfsTer8) variant results in a frameshift and is predicted to result in premature termination of the protein. It was observed by ICSL 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 for this variant, it could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene and cDNA change, and amino acid change. No publications were found based on this search. Due to the potential impact of frameshift variants and the lack of clarifying evidence, this variant is classified as a variant of unknown significance but suspicious for pathogenicity for susceptibility to nonalcoholic fatty liver disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

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