chr13-51949672-C-A

Variant names:

• chr13-51949672-C-A
• rs732774
• NM_000053.4:c.2855G>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 3P and 1B. PM2 PP2 BP4

The NM_000053.4(ATP7B):​c.2855G>T​(p.Arg952Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign 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. R952K) has been classified as Benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: ATP7B NM_000053.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.25
• 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: Uncertain_significance. The variant received 2 ACMG points.

• 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.
• BP4: Computational evidence support a benign effect (MetaRNN=0.2647095).

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.2855G>T	p.Arg952Ile	missense	Exon 12 of 21	NP_000044.2	P35670-1
	ATP7B	NM_001406511.1		c.2855G>T	p.Arg952Ile	missense	Exon 13 of 22	NP_001393440.1	P35670-1
	ATP7B	NM_001406512.1		c.2855G>T	p.Arg952Ile	missense	Exon 13 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.2855G>T	p.Arg952Ile	missense	Exon 12 of 21	ENSP00000242839.5	P35670-1
	ATP7B	ENST00000634844.1	TSL:1	c.2711G>T	p.Arg904Ile	missense	Exon 12 of 21	ENSP00000489398.1	B7ZLR4
	ATP7B	ENST00000418097.7	TSL:1	c.2855G>T	p.Arg952Ile	missense	Exon 12 of 20	ENSP00000393343.2	F5H748

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 60

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.20
BayesDel_addAF	Uncertain	0.094	D
BayesDel_noAF	Benign	-0.10
CADD	Benign	22
DANN	Uncertain	0.98
DEOGEN2	Uncertain	0.73	D
Eigen	Benign	-0.47
Eigen_PC	Benign	-0.21
FATHMM_MKL	Uncertain	0.87	D
LIST_S2	Benign	0.31	T
M_CAP	Uncertain	0.27	D
MetaRNN	Benign	0.26	T
MetaSVM	Uncertain	0.38	D
MutationAssessor	Benign	-0.63	N
PhyloP100		2.2
PrimateAI	Benign	0.46	T
PROVEAN	Uncertain	-2.5	D
REVEL	Uncertain	0.40
Sift	Benign	0.096	T
Sift4G	Benign	0.14	T
Polyphen		0.0050	B
Vest4		0.22
MutPred		0.58		Loss of disorder (P = 0.0534)
MVP		0.95
MPC		0.12
ClinPred		0.74	D
GERP RS		6.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.17
gMVP		0.71
Mutation Taster		=59/41	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.18		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: rs732774; hg19: chr13-52523808;