NM_020376.4:c.1406C>T

Variant names:

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_StrongBP6BS1

The NM_020376.4(PNPLA2):c.1406C>T(p.Pro469Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000978 in 1,564,634 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00059 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000045 ( 0 hom. )

Consequence

PNPLA2
NM_020376.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 0.250

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

neutral lipid storage myopathy
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, ClinGen, G2P, Labcorp Genetics (formerly Invitae), Orphanet

PNPLA2 links:

ENSG00000255108 (HGNC:):

ENSG00000255108 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.008915156).

BP6

Variant 11-824753-C-T is Benign according to our data. Variant chr11-824753-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 534196.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.000591 (90/152308) while in subpopulation AFR AF = 0.00209 (87/41580). AF 95% confidence interval is 0.00174. There are 0 homozygotes in GnomAd4. There are 40 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PNPLA2	NM_020376.4 link	c.1406C>T	p.Pro469Leu	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.1406C>T	p.Pro469Leu	missense_variant	Exon 10 of 10	1	NM_020376.4	ENSP00000337701.4		Q96AD5-1

Frequencies

GnomAD3 genomes

AF:

0.000591

AC:

AN:

152198

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00210

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.00

Gnomad OTH

AF:

0.000955

GnomAD2 exomes

AF:

0.000101

AC:

AN:

167948

AF XY:

0.000107

show subpopulations

Gnomad AFR exome

AF:

0.00160

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000281

Gnomad OTH exome

AF:

0.000219

GnomAD4 exome

AF:

0.0000446

AC:

AN:

1412326

Hom.:

Cov.:

AF XY:

0.0000471

AC XY:

AN XY:

699992

show subpopulations

African (AFR)

AF:

0.00157

AC:

AN:

32476

American (AMR)

AF:

0.0000251

AC:

AN:

39848

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25360

East Asian (EAS)

AF:

0.00

AC:

AN:

37650

South Asian (SAS)

AF:

0.00

AC:

AN:

82136

European-Finnish (FIN)

AF:

0.00

AC:

AN:

35706

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5698

European-Non Finnish (NFE)

AF:

0.00000274

AC:

AN:

1094584

Other (OTH)

AF:

0.000136

AC:

AN:

58868

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.512

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

AF:

0.000591

AC:

AN:

152308

Hom.:

Cov.:

AF XY:

0.000537

AC XY:

AN XY:

74470

show subpopulations

African (AFR)

AF:

0.00209

AC:

AN:

41580

American (AMR)

AF:

0.0000653

AC:

AN:

15306

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5174

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10632

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67994

Other (OTH)

AF:

0.000945

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.505

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome 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

Alfa

AF:

0.000348

Hom.:

Bravo

AF:

0.000521

ExAC

AF:

0.000108

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Neutral lipid storage myopathy

Uncertain:2

Oct 17, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 469 of the PNPLA2 protein (p.Pro469Leu). This variant is present in population databases (rs201177082, gnomAD 0.1%). This variant has not been reported in the literature in individuals affected with PNPLA2-related conditions. ClinVar contains an entry for this variant (Variation ID: 534196). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Nov 04, 2020

Revvity Omics, Revvity

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Inborn genetic diseases

Uncertain:1

Mar 24, 2023

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.1406C>T (p.P469L) alteration is located in exon 10 (coding exon 9) of the PNPLA2 gene. This alteration results from a C to T substitution at nucleotide position 1406, causing the proline (P) at amino acid position 469 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Jan 04, 2024

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

In silico analysis indicates that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.092

BayesDel_addAF

Benign

-0.54

BayesDel_noAF

Benign

-0.58

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.21

Eigen

Benign

-0.34

Eigen_PC

Benign

-0.49

FATHMM_MKL

Benign

0.17

LIST_S2

Benign

0.43

M_CAP

Benign

0.0034

MetaRNN

Benign

0.0089

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.5

PhyloP100

0.25

PrimateAI

Uncertain

0.67

PROVEAN

Benign

-0.81

REVEL

Benign

0.065

Sift

Benign

0.20

Sift4G

Benign

0.27

Polyphen

0.91

Vest4

0.11

MutPred

0.21

Loss of glycosylation at P469 (P = 0.0153);

MVP

0.46

MPC

0.63

ClinPred

0.046

GERP RS

3.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.2

Varity_R

0.039

gMVP

0.24

Mutation Taster

=88/12

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over