rs1555282097

Variant names:

• chr13-51934817-T-TC
• rs1555282097
• NM_000053.4:c.4336dupG

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PVS1_Strong PM2

The NM_000053.4(ATP7B):​c.4336dupG​(p.Asp1446GlyfsTer3) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (no stars). Synonymous variant affecting the same amino acid position (i.e. D1446D) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: ATP7B NM_000053.4 frameshift
• Clinical Significance: Uncertain significance no assertion criteria provided U:1
• Conservation: PhyloP100: 1.43
• Publications: 0 publications found

Genes affected

ATP7B (HGNC:870): (ATPase copper transporting beta) This gene is a member of the P-type cation transport ATPase family and encodes a protein with several membrane-spanning domains, an ATPase consensus sequence, a hinge domain, a phosphorylation site, and at least 2 putative copper-binding sites. This protein is a monomer, and functions as a copper-transporting ATPase which exports copper out of the cells, such as the efflux of hepatic copper into the bile. Alternate transcriptional splice variants, encoding different isoforms with distinct cellular localizations, have been characterized. Mutations in this gene have been associated with Wilson disease which is characterized by copper accumulation. [provided by RefSeq, Dec 2019]

ATP7B Gene-Disease associations (from GenCC):

• Wilson disease

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

ACMG classification

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. There are 7 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000053.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ATP7B	NM_000053.4	MANE Select	c.4336dupG	p.Asp1446GlyfsTer3	frameshift	Exon 21 of 21	NP_000044.2	P35670-1
	ATP7B	NM_001406511.1		c.4336dupG	p.Asp1446GlyfsTer3	frameshift	Exon 22 of 22	NP_001393440.1	P35670-1
	ATP7B	NM_001406512.1		c.4336dupG	p.Asp1446GlyfsTer3	frameshift	Exon 22 of 22	NP_001393441.1	P35670-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ATP7B	ENST00000242839.10	TSL:1 MANE Select	c.4336dupG	p.Asp1446GlyfsTer3	frameshift	Exon 21 of 21	ENSP00000242839.5	P35670-1
	ATP7B	ENST00000634844.1	TSL:1	c.4192dupG	p.Asp1398GlyfsTer3	frameshift	Exon 21 of 21	ENSP00000489398.1	B7ZLR4
	ATP7B	ENST00000418097.7	TSL:1	c.4141dupG	p.Asp1381GlyfsTer3	frameshift	Exon 20 of 20	ENSP00000393343.2	F5H748

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
-	1	-	Wilson disease (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		1.4

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs1555282097; hg19: chr13-52508953;