NM_020376.4:c.1220C>G

Variant names:

• chr11-824567-C-G
• rs202081894
• NM_020376.4:c.1220C>G

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_020376.4(PNPLA2):​c.1220C>G​(p.Ser407Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S407F) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: PNPLA2 NM_020376.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.21
• Publications: 0 publications found

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

ENSG00000255108 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.30460492).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PNPLA2	NM_020376.4	c.1220C>G	p.Ser407Cys	missense_variant	Exon 10 of 10	ENST00000336615.9	NP_065109.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PNPLA2	ENST00000336615.9	c.1220C>G	p.Ser407Cys	missense_variant	Exon 10 of 10	1	NM_020376.4	ENSP00000337701.4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 42

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.095
BayesDel_addAF	Benign	-0.095	T
BayesDel_noAF	Benign	-0.37
CADD	Uncertain	24
DANN	Uncertain	0.98
DEOGEN2	Benign	0.31	T
Eigen	Benign	0.10
Eigen_PC	Benign	-0.010
FATHMM_MKL	Uncertain	0.85	D
LIST_S2	Benign	0.72	T
M_CAP	Uncertain	0.11	D
MetaRNN	Benign	0.30	T
MetaSVM	Benign	-0.92	T
MutationAssessor	Benign	1.6	L
PhyloP100		2.2
PrimateAI	Uncertain	0.74	T
PROVEAN	Benign	-0.55	N
REVEL	Benign	0.10
Sift	Uncertain	0.023	D
Sift4G	Uncertain	0.060	T
Polyphen		1.0	D
Vest4		0.20
MutPred		0.28		Loss of disorder (P = 0.0127);
MVP		0.57
MPC		0.69
ClinPred		0.39	T
GERP RS		4.0
Varity_R		0.081
gMVP		0.30
Mutation Taster		=71/29	polymorphism

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

Other links and lift over

dbSNP: rs202081894; hg19: chr11-824567;