chr16-28900751-C-T

Variant names:

• chr16-28900751-C-T
• rs754620899
• NM_004320.6:c.1935C>T

Variant summary

Our verdict is Benign. The variant received -10 ACMG points: 0P and 10B. BP4_Strong BP6 BP7 BS1

The NM_004320.6(ATP2A1):​c.1935C>T​(p.Asn645Asn) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00017 in 1,614,142 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.000066 (0 hom., cov: 31)
  • Exomes 𝑓: 0.00018 (1 hom.)
• Consequence: ATP2A1 NM_004320.6 synonymous
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:1
• Conservation: PhyloP100: -5.30
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• Brody myopathy

  Inheritance: AR, AD Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp, Orphanet, Ambry Genetics

ACMG classification

Our verdict: Benign. The variant received -10 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.66).
• BP6: Variant 16-28900751-C-T is Benign according to our data. Variant chr16-28900751-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 318780.We mark this variant Likely_benign, oryginal submission is: [Conflicting_classifications_of_pathogenicity].
• BP7: Synonymous conserved (PhyloP=-5.3 with no splicing effect.
• BS1: Variant frequency is greater than expected in population mid. GnomAdExome4 allele frequency = 0.000181 (265/1461886) while in subpopulation MID AF = 0.00277 (16/5768). AF 95% confidence interval is 0.00174. There are 1 homozygotes in GnomAdExome4. There are 165 alleles in the male GnomAdExome4 subpopulation. Median coverage is 32. This position passed quality control check.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ATP2A1	NM_004320.6	c.1935C>T	p.Asn645Asn	synonymous_variant	Exon 15 of 23	ENST00000395503.9	NP_004311.1
ATP2A1	NM_173201.5	c.1935C>T	p.Asn645Asn	synonymous_variant	Exon 15 of 22		NP_775293.1
ATP2A1	NM_001286075.2	c.1560C>T	p.Asn520Asn	synonymous_variant	Exon 13 of 21		NP_001273004.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ATP2A1	ENST00000395503.9	c.1935C>T	p.Asn645Asn	synonymous_variant	Exon 15 of 23	1	NM_004320.6	ENSP00000378879.5
ATP2A1	ENST00000357084.7	c.1935C>T	p.Asn645Asn	synonymous_variant	Exon 15 of 22	2		ENSP00000349595.3
ATP2A1	ENST00000536376.5	c.1560C>T	p.Asn520Asn	synonymous_variant	Exon 13 of 21	2		ENSP00000443101.1
ATP2A1	ENST00000564732.1	n.*578C>T		downstream_gene_variant		5		ENSP00000457357.1

Frequencies

GnomAD3 genomes AF: 0.0000657 AC: 10 AN: 152138 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.0000724

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000588

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.000243 AC: 61 AN: 250594 AF XY: 0.000325

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000202

Gnomad ASJ exome AF: 0.0000992

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000275

Gnomad OTH exome AF: 0.000815

GnomAD4 exome AF: 0.000181 AC: 265 AN: 1461886 Hom.: 1 Cov.: 32 AF XY: 0.000227 AC XY: 165 AN XY: 727244

African (AFR) AF: 0.000119 AC: 4 AN: 33480

American (AMR) AF: 0.000224 AC: 10 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.0000252 AC: 1 AN: 39700

South Asian (SAS) AF: 0.000499 AC: 43 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53416

Middle Eastern (MID) AF: 0.00277 AC: 16 AN: 5768

European-Non Finnish (NFE) AF: 0.000158 AC: 176 AN: 1112008

Other (OTH) AF: 0.000248 AC: 15 AN: 60396

GnomAD4 genome AF: 0.0000657 AC: 10 AN: 152256 Hom.: 0 Cov.: 31 AF XY: 0.0000403 AC XY: 3 AN XY: 74450

African (AFR) AF: 0.0000722 AC: 3 AN: 41556

American (AMR) AF: 0.000131 AC: 2 AN: 15284

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5166

South Asian (SAS) AF: 0.000207 AC: 1 AN: 4826

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10614

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.0000588 AC: 4 AN: 68024

Other (OTH) AF: 0.00 AC: 0 AN: 2110

Alfa AF: 0.000383 Hom.: 1

Bravo AF: 0.000113

EpiCase AF: 0.000218

EpiControl AF: 0.000415

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Brody myopathy Uncertain:1 Benign:1

Nov 14, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.66
CADD	Benign	0.035
DANN	Benign	0.91
PhyloP100		-5.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Mutation Taster		=100/0	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: rs754620899; hg19: chr16-28912072; COSMIC: COSV62869409; COSMIC: COSV62869409;