NM_000053.4:c.2495A>T

Variant names:

• chr13-51950352-T-A
• rs1061472
• NM_000053.4:c.2495A>T

Variant summary

Our verdict is Likely pathogenic. The variant received 7 ACMG points: 7P and 0B. PM1 PM2 PP2 PP3_Moderate

The NM_000053.4(ATP7B):​c.2495A>T​(p.Lys832Met) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. K832R) has been classified as Benign.

• Frequency: Genomes: not found (cov: 31)
• Consequence: ATP7B NM_000053.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.19
• 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: Likely_pathogenic. The variant received 7 ACMG points.

• PM1: In a hotspot region, there are 12 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 11 uncertain in NM_000053.4
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 198 curated pathogenic missense variants (we use a threshold of 10). The gene has 32 curated benign missense variants. Gene score misZ: -0.88091 (below the threshold of 3.09). Trascript score misZ: 0.82063 (below the threshold of 3.09). GenCC associations: The gene is linked to Wilson disease.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.938

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ATP7B	NM_000053.4	c.2495A>T	p.Lys832Met	missense_variant	Exon 10 of 21	ENST00000242839.10	NP_000044.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ATP7B	ENST00000242839.10	c.2495A>T	p.Lys832Met	missense_variant	Exon 10 of 21	1	NM_000053.4	ENSP00000242839.5

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 71

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.70
BayesDel_addAF	Pathogenic	0.38	D
BayesDel_noAF	Pathogenic	0.31
CADD	Uncertain	26
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.90	D;D;.;.;.;.
Eigen	Uncertain	0.66
Eigen_PC	Pathogenic	0.67
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Pathogenic	0.98	D;D;D;D;D;D
M_CAP	Pathogenic	0.53	D
MetaRNN	Pathogenic	0.94	D;D;D;D;D;D
MetaSVM	Uncertain	0.78	D
MutationAssessor	Benign	1.8	L;.;.;.;.;.
PhyloP100		6.2
PrimateAI	Uncertain	0.55	T
PROVEAN	Pathogenic	-5.1	D;D;D;D;.;D
REVEL	Pathogenic	0.87
Sift	Pathogenic	0.0	D;D;D;D;.;D
Sift4G	Pathogenic	0.0	D;D;D;D;D;D
Polyphen		1.0	D;D;D;P;D;D
Vest4		0.79
MutPred		0.53		Loss of catalytic residue at K832 (P = 0.0019);.;.;.;.;Loss of catalytic residue at K832 (P = 0.0019);
MVP		0.98
MPC		0.40
ClinPred		1.0	D
GERP RS		5.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.85
gMVP		0.86
Mutation Taster		=6/94	disease causing

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: rs1061472; hg19: chr13-52524488;