rs397516783

Variant names:

• chr6-118559073-T-C
• rs397516783
• NM_002667.5:c.152T>C

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PM1 PM2 PP3_Strong

The NM_002667.5(PLN):​c.152T>C​(p.Leu51Pro) variant causes a missense change. The variant allele was found at a frequency of 0.00000206 in 1,457,970 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L51F) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: PLN NM_002667.5 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 6.64

Genes affected

PLN (HGNC:9080): (phospholamban) The protein encoded by this gene is found as a pentamer and is a major substrate for the cAMP-dependent protein kinase in cardiac muscle. The encoded protein is an inhibitor of cardiac muscle sarcoplasmic reticulum Ca(2+)-ATPase in the unphosphorylated state, but inhibition is relieved upon phosphorylation of the protein. The subsequent activation of the Ca(2+) pump leads to enhanced muscle relaxation rates, thereby contributing to the inotropic response elicited in heart by beta-agonists. The encoded protein is a key regulator of cardiac diastolic function. Mutations in this gene are a cause of inherited human dilated cardiomyopathy with refractory congestive heart failure, and also familial hypertrophic cardiomyopathy. [provided by RefSeq, Apr 2016]

CEP85L (HGNC:21638): (centrosomal protein 85 like) The protein encoded by this gene was identified as a breast cancer antigen. Nothing more is known of its function at this time. Three transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, May 2010]

ACMG classification

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

• PM1: In a chain Cardiac phospholamban (size 51) in uniprot entity PPLA_HUMAN there are 11 pathogenic changes around while only 0 benign (100%) in NM_002667.5
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.953

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PLN	NM_002667.5	c.152T>C	p.Leu51Pro	missense_variant	Exon 2 of 2	ENST00000357525.6	NP_002658.1
CEP85L	NM_001042475.3	c.1020+6456A>G		intron_variant	Intron 3 of 12	ENST00000368491.8	NP_001035940.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PLN	ENST00000357525.6	c.152T>C	p.Leu51Pro	missense_variant	Exon 2 of 2	1	NM_002667.5	ENSP00000350132.5
CEP85L	ENST00000368491.8	c.1020+6456A>G		intron_variant	Intron 3 of 12	1	NM_001042475.3	ENSP00000357477.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000206 AC: 3 AN: 1457970 Hom.: 0 Cov.: 28 AF XY: 0.00000138 AC XY: 1 AN XY: 725632

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: 0.00000271

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Uncertain:1

Aug 24, 2012

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant classified as Uncertain Significance - Favor Pathogenic. The Leu51Pro va riant in PLN has not been reported in the literature and has not been identified in large and broad European and African American populations by the NHLBI Exome Sequencing Project (http://evs.gs.washington.edu/EVS). This low frequency is co nsistent with a disease causing role but insufficient to establish this with con fidence. Computational analyses (biochemical amino acid properties, conservation , AlignGVGD, PolyPhen2, and SIFT) suggest that the Leu51Pro variant may impact t he protein, though this information is not predictive enough to determine pathog enicity. Additional studies are needed to fully assess the clinical significance of the Leu51Pro variant. -

Dilated cardiomyopathy 1P Uncertain:1

May 18, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive. ClinVar contains an entry for this variant (Variation ID: 44577). This missense change has been observed in individual(s) with hypertrophic cardiomyopathy (PMID: 27532257). This variant is not present in population databases (gnomAD no frequency). This sequence change replaces leucine, which is neutral and non-polar, with proline, which is neutral and non-polar, at codon 51 of the PLN protein (p.Leu51Pro). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.75
CardioboostCm	Pathogenic	0.97
BayesDel_addAF	Pathogenic	0.50	D
BayesDel_noAF	Pathogenic	0.49
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.83	D
Eigen	Uncertain	0.67
Eigen_PC	Uncertain	0.66
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Benign	0.71	T
M_CAP	Pathogenic	0.63	D
MetaRNN	Pathogenic	0.95	D
MetaSVM	Pathogenic	0.90	D
PrimateAI	Pathogenic	0.90	D
PROVEAN	Pathogenic	-4.7	D
REVEL	Pathogenic	0.94
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		0.99	D
Vest4		0.95
MutPred		0.74		Loss of stability (P = 0.0038);
MVP		0.99
MPC		1.6
ClinPred		1.0	D
GERP RS		5.4
Varity_R		0.97
gMVP		0.94

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

Other links and lift over

dbSNP: rs397516783; hg19: chr6-118880236;