chr16-28878763-G-A

Position:

• chr16-28878763-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_004320.6(ATP2A1):​c.92G>A​(p.Arg31Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000041 in 1,461,676 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: ATP2A1 NM_004320.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.27

Genes affected

ATP2A1 (HGNC:811): (ATPase sarcoplasmic/endoplasmic reticulum Ca2+ transporting 1) This gene encodes one of the SERCA Ca(2+)-ATPases, which are intracellular pumps located in the sarcoplasmic or endoplasmic reticula of muscle cells. This enzyme catalyzes the hydrolysis of ATP coupled with the translocation of calcium from the cytosol to the sarcoplasmic reticulum lumen, and is involved in muscular excitation and contraction. Mutations in this gene cause some autosomal recessive forms of Brody disease, characterized by increasing impairment of muscular relaxation during exercise. Alternative splicing results in three transcript variants encoding different isoforms. [provided by RefSeq, Oct 2013]

ATP2A1-AS1 (HGNC:51370): (ATP2A1 antisense RNA 1)

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.12575018).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ATP2A1	NM_004320.6	c.92G>A	p.Arg31Gln	missense_variant	1/23	ENST00000395503.9
ATP2A1	NM_173201.5	c.92G>A	p.Arg31Gln	missense_variant	1/22

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ATP2A1	ENST00000395503.9	c.92G>A	p.Arg31Gln	missense_variant	1/23	1	NM_004320.6	P4
ATP2A1-AS1	ENST00000691192.2	n.1174C>T		non_coding_transcript_exon_variant	1/1
ATP2A1	ENST00000357084.7	c.92G>A	p.Arg31Gln	missense_variant	1/22	2		A1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000410 AC: 6 AN: 1461676 Hom.: 0 Cov.: 31 AF XY: 0.00000550 AC XY: 4 AN XY: 727130

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: 0.0000116

Gnomad4 FIN exome AF: 0.0000187

Gnomad4 NFE exome AF: 0.00000360

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Brody myopathy Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 25, 2022

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 tolerated. ClinVar contains an entry for this variant (Variation ID: 1427259). This variant has not been reported in the literature in individuals affected with ATP2A1-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces arginine, which is basic and polar, with glutamine, which is neutral and polar, at codon 31 of the ATP2A1 protein (p.Arg31Gln). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.071
BayesDel_addAF	Uncertain	0.027	T
BayesDel_noAF	Benign	-0.20
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Benign	0.068	T;.
Eigen	Benign	-0.14
Eigen_PC	Benign	0.037
FATHMM_MKL	Benign	0.59	D
LIST_S2	Pathogenic	0.98	D;D
M_CAP	Benign	0.046	D
MetaRNN	Benign	0.13	T;T
MetaSVM	Benign	-0.75	T
MutationAssessor	Benign	0.87	L;L
MutationTaster	Benign	0.74	N;N
PrimateAI	Benign	0.47	T
PROVEAN	Benign	-0.11	N;N
REVEL	Benign	0.16
Sift	Benign	0.38	T;T
Sift4G	Benign	0.38	T;T
Polyphen		0.018	B;B
Vest4		0.12
MutPred		0.32		Gain of ubiquitination at K30 (P = 0.0975);Gain of ubiquitination at K30 (P = 0.0975);
MVP		0.86
MPC		0.57
ClinPred		0.63	D
GERP RS		4.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Varity_R		0.13
gMVP		0.62

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.080		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: rs1596658318; hg19: chr16-28890084; COSMIC: COSV59468258; COSMIC: COSV59468258;