chr13-51950333-CTT-C

Variant names:

• chr13-51950333-CTT-C
• rs777362050
• NM_000053.4:c.2512_2513delAA

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_000053.4(ATP7B):​c.2512_2513delAA​(p.Lys838ValfsTer15) variant causes a frameshift change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ATP7B NM_000053.4 frameshift
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 5.05
• 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, Genomics England PanelApp, Orphanet, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Pathogenic. The variant received 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 13-51950333-CTT-C is Pathogenic according to our data. Variant chr13-51950333-CTT-C is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 1725325.Status of the report is criteria_provided_single_submitter, 1 stars.

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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ATP7B	NM_000053.4	MANE Select	c.2512_2513delAA	p.Lys838ValfsTer15	frameshift	Exon 10 of 21	NP_000044.2
	ATP7B	NM_001406511.1		c.2512_2513delAA	p.Lys838ValfsTer15	frameshift	Exon 11 of 22	NP_001393440.1
	ATP7B	NM_001406512.1		c.2512_2513delAA	p.Lys838ValfsTer15	frameshift	Exon 11 of 22	NP_001393441.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ATP7B	ENST00000242839.10	TSL:1 MANE Select	c.2512_2513delAA	p.Lys838ValfsTer15	frameshift	Exon 10 of 21	ENSP00000242839.5
	ATP7B	ENST00000634844.1	TSL:1	c.2368_2369delAA	p.Lys790ValfsTer15	frameshift	Exon 10 of 21	ENSP00000489398.1
	ATP7B	ENST00000418097.7	TSL:1	c.2512_2513delAA	p.Lys838ValfsTer15	frameshift	Exon 10 of 20	ENSP00000393343.2

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Wilson disease Pathogenic:1

Dec 02, 2021

Myriad Genetics, Inc.

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

NM_000053.3(ATP7B):c.2512_2513delAA(K838Vfs*15) is expected to be pathogenic in the context of Wilson disease. This variant is predicted to lead to an abnormal or absent protein product due to the creation of a premature termination codon in ATP7B, a gene where loss-of-function variants are known to be pathogenic. Please note: this variant was assessed in the context of healthy population screening.

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		5.0

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: rs777362050; hg19: chr13-52524469;