NM_000053.4:c.2855_2856delinsCT

Variant names:

• chr13-51949671-TC-AG
• NM_000053.4:c.2855_2856delinsCT
• ATP7B p.Arg952Thr

Variant summary

Our verdict is Uncertain significance.

+4 Uncertain · Hot

-7

-6

-1

0

+5

+6

+9

+10

BenignB

Likely BenignLB

UncertainVUS

Likely PathogenicLP

PathogenicP

The variant received 4 classification points (ACGS-UK Somatic Oncogenicity v2025). O3_ModerateO7_SupportingO8_Supporting

The NM_000053.4(ATP7B):c.2855_2856delinsCT (p.Arg952Thr) variant causes a missense change. The gene ATP7B is a known oncogene (CancerMine: 1 oncogene citations). Note: allele frequency estimates from gnomAD may be inaccurate for this variant type (MNP or indel longer than 3 bp) due to technology limitations. The variant is absent from the gnomAD population database at sites with sufficient sequencing coverage. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Other variants at the same amino acid position have been reported in ClinVar (not pathogenic): p.R952S: Uncertain_significance (ClinVar VariationId 3459534, 1 star); p.R952K: Benign (ClinVar VariationId 35708, 2 stars)

• Frequency: Genomes: not found (cov: 32)
• 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: Labcorp Genetics (formerly Invitae), Natera, ClinGen, Genomics England PanelApp, Orphanet

Classification according to ACGS-UK Somatic Oncogenicity v2025

Classification was made for transcript:

Our verdict: Uncertain_significance. The variant received 4 points.

Apply	Criterion Code & Title / Strength	Strength	Rationale / Clinical Context
	O3Absent or very rare in population		Absent or extremely rare in gnomAD (AC ≤ 2) — O3 moderate; GnomAD: AF = absent, AC = 0 — absent/extremely rare (O3 moderate [+2])
	O7Mutational hotspot or critical domain		Supporting: cancerhotspots.org hit, critical domain, or missense neighbourhood hotspot; No cancerhotspots.org hit at this position; UniProt domain: 0 pathogenic, 0 benign.; ±8 AA neighbourhood: 1 pathogenic, 1 benign (OR vs. background: 5.0); Variant does not impact splicing — splice-hotspot path not applicable
	O8Missense constraint in gene or region		Missense in gene/domain constrained for missense variation where missense is common disease mechanism (O8 supporting); Gene/disease mechanism: missense is a common mechanism of oncogenesis; gnomAD missense Z-score: 0.84 (threshold ≥3.09 for constraint); Domain-level constraint: variant is in a critically constrained functional domain (IS_AT_CRITICAL_DOMAIN)

Variant Effect in Transcripts

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

RefSeq Transcripts

Sel.	Gene / Transcript	Tags	HGVSc / HGVSp	Effect	Exon rank	Protein / UniProt
	ATP7B NM_000053.4	MANE Select	c.2855_2856delinsCT p.Arg952Thr	missense	Exon 12 of 21	Prot: NP_000044.2
	ATP7B NM_001406511.1		c.2855_2856delinsCT p.Arg952Thr	missense	Exon 13 of 22	Prot: NP_001393440.1
	ATP7B NM_001406512.1		c.2855_2856delinsCT p.Arg952Thr	missense	Exon 13 of 22	Prot: NP_001393441.1

ATP7B NM_000053.4

MANE Select

HGVSc / HGVSpc.2855_2856delinsCTp.Arg952Thr

Exon rankExon 12 of 21

missense

Prot: NP_000044.2

ATP7B NM_001406511.1

HGVSc / HGVSpc.2855_2856delinsCTp.Arg952Thr

Exon rankExon 13 of 22

missense

Prot: NP_001393440.1

ATP7B NM_001406512.1

HGVSc / HGVSpc.2855_2856delinsCTp.Arg952Thr

Exon rankExon 13 of 22

missense

Prot: NP_001393441.1

Ensembl Transcripts

Sel.	Gene / Transcript	Tags	HGVSc / HGVSp	Effect	Exon rank	Protein / UniProt
	ATP7B ENST00000242839.10	MANE Select	c.2855_2856delinsCT p.Arg952Thr	missense	Exon 12 of 21	Prot: ENSP00000242839
	ATP7B ENST00000634844.2	TSL:1	c.2711_2712delinsCT p.Arg904Thr	missense	Exon 12 of 21	Prot: ENSP00000489398
	ATP7B ENST00000418097.8	TSL:1	c.2855_2856delinsCT p.Arg952Thr	missense	Exon 12 of 20	Prot: ENSP00000393343

ATP7B ENST00000242839.10

MANE Select

HGVSc / HGVSpc.2855_2856delinsCTp.Arg952Thr

Exon rankExon 12 of 21

missense

Prot: ENSP00000242839

ATP7B ENST00000634844.2

TSL:1

HGVSc / HGVSpc.2711_2712delinsCTp.Arg904Thr

Exon rankExon 12 of 21

missense

Prot: ENSP00000489398

ATP7B ENST00000418097.8

TSL:1

HGVSc / HGVSpc.2855_2856delinsCTp.Arg952Thr

Exon rankExon 12 of 20

missense

Prot: ENSP00000393343

Frequencies

Allele frequencies (AF), counts (AC/AN), homozygotes and coverage

Common (AF > 0.05 / Hom > 5)

Rare (AF ≤ 0.0001 / Hom ≤ 1)

Source / population	AF	AC	Hom	AN	Coverage
Global population databases 2 sources Large-scale international reference populations
GnomAD3 genomes	AF:	AC:	Hom:	AN:	Cov:32
GnomAD4 genome	AF:	AC:	Hom:	AN:	Cov:32

Showing 2 sources

ClinVar

Not reported in ClinVar

Computational Scores

Algorithm	Calibrated pred.	Score	Prediction
PhyloP100	Benign	2.2

Showing 1 of 1 scores

Splicing Scores

No splicing scores have been computed for this variant.

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

MaveDB functional evidence

MaveDB is a public repository of laboratory assays that test the effect of thousands of variants at once — treat this as supporting research data and interpret it with great caution; it is not a clinical classification.

No MaveDB functional evidence found for this variant.

Other links and lift over

hg19: chr13-52523807;

ACMG debug oncogenicity

ACGS debug oncogenicity

ACMG debug germline

Submit to ClinVar