rs876657955

chr6-118558988-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM1 PM2

The NM_002667.5(PLN):c.67C>G(p.Gln23Glu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. Q23Q) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PLN NM_002667.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.55

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 Uncertain_significance. Variant got 4 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 7 uncertain in NM_002667.5
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PLN	NM_002667.5	c.67C>G	p.Gln23Glu	missense_variant	2/2	ENST00000357525.6
CEP85L	NM_001042475.3	c.1020+6541G>C		intron_variant		ENST00000368491.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PLN	ENST00000357525.6	c.67C>G	p.Gln23Glu	missense_variant	2/2	1	NM_002667.5	P1
CEP85L	ENST00000368491.8	c.1020+6541G>C		intron_variant		1	NM_001042475.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 28

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Mar 11, 2015

The p.Gln23Glu variant in PLN has not been previously reported in individuals wi th cardiomyopathy and was absent from large population studies. Computational pr ediction tools and conservation analyses do not provide strong support for or ag ainst an impact to the protein. In summary, the clinical significance of the p.G ln23Glu variant is uncertain. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.061
CardioboostCm	Uncertain	0.10
BayesDel_addAF	Uncertain	0.15	D
BayesDel_noAF	Uncertain	-0.020
Cadd	Benign	23
Dann	Benign	0.94
DEOGEN2	Pathogenic	0.80	D
Eigen	Benign	0.16
Eigen_PC	Uncertain	0.34
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Benign	0.79	T
M_CAP	Pathogenic	0.32	D
MetaRNN	Uncertain	0.48	T
MetaSVM	Uncertain	-0.053	T
MutationTaster	Benign	1.0	D;D;D;D;D;D
PrimateAI	Uncertain	0.57	T
PROVEAN	Uncertain	-2.9	D
REVEL	Uncertain	0.63
Sift	Uncertain	0.017	D
Sift4G	Pathogenic	0.0	D
Polyphen		0.0060	B
Vest4		0.41
MutPred		0.68		Gain of ubiquitination at K27 (P = 0.0582);
MVP		0.94
MPC		0.61
ClinPred		0.96	D
GERP RS		5.6
Varity_R		0.70
gMVP		0.64

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: rs876657955; hg19: chr6-118880151;