rs1555291085

Variant names:

• chr13-51958312-T-C
• rs1555291085
• NM_000053.4:c.2354A>G

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM1 PM2 PP2 PP3

The NM_000053.4(ATP7B):​c.2354A>G​(p.Lys785Arg) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000616 in 1,461,842 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. K785Q) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000062 (0 hom.)
• Consequence: ATP7B NM_000053.4 missense, splice_region
• Scores: Splicing: ADA: 0.9997
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:3
• Conservation: PhyloP100: 7.96
• Publications: 1 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.

• PM1: In a hotspot region, there are 11 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 10 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: Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

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.2354A>G	p.Lys785Arg	missense splice_region	Exon 8 of 21	NP_000044.2	P35670-1
	ATP7B	NM_001406511.1		c.2354A>G	p.Lys785Arg	missense splice_region	Exon 9 of 22	NP_001393440.1	P35670-1
	ATP7B	NM_001406512.1		c.2354A>G	p.Lys785Arg	missense splice_region	Exon 9 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.2354A>G	p.Lys785Arg	missense splice_region	Exon 8 of 21	ENSP00000242839.5	P35670-1
	ATP7B	ENST00000634844.1	TSL:1	c.2210A>G	p.Lys737Arg	missense splice_region	Exon 8 of 21	ENSP00000489398.1	B7ZLR4
	ATP7B	ENST00000418097.7	TSL:1	c.2354A>G	p.Lys785Arg	missense splice_region	Exon 8 of 20	ENSP00000393343.2	F5H748

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000616 AC: 9 AN: 1461842 Hom.: 0 Cov.: 31 AF XY: 0.00000550 AC XY: 4 AN XY: 727222

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

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

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53418

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.00000809 AC: 9 AN: 1111966

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	2	-	Wilson disease (2)
-	1	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.35
BayesDel_addAF	Pathogenic	0.30	D
BayesDel_noAF	Pathogenic	0.20
CADD	Pathogenic	31
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.85	D
Eigen	Uncertain	0.33
Eigen_PC	Uncertain	0.34
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.95	D
M_CAP	Pathogenic	0.36	D
MetaRNN	Pathogenic	0.84	D
MetaSVM	Uncertain	0.48	D
MutationAssessor	Benign	1.5	L
PhyloP100		8.0
PrimateAI	Uncertain	0.69	T
PROVEAN	Uncertain	-2.5	N
REVEL	Pathogenic	0.77
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.0060	D
Polyphen		0.99	D
Vest4		0.73
MutPred		0.65		Loss of ubiquitination at K785 (P = 0.0192)
MVP		0.89
MPC		0.35
ClinPred		0.99	D
GERP RS		4.2
Varity_R		0.72
gMVP		0.69
Mutation Taster		=2/98	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.95
SpliceAI score (max)		0.55		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.55		Position offset: -1

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs1555291085; hg19: chr13-52532448;