X-78011498-G-C

Position:

• chrX-78011498-G-C

Variant summary

Our verdict is Pathogenic. Variant got 16 ACMG points: 16P and 0B. PS1 PM2 PP3_Moderate PP5_Very_Strong

The NM_000052.7(ATP7A):​c.1996G>C​(p.Gly666Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Another nucleotide change resulting in same amino acid change has been previously reported as Likely pathogenicin ClinVar.

• Frequency: Genomes: not found (cov: 22)
• Consequence: ATP7A NM_000052.7 missense
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:3 U:1
• Conservation: PhyloP100: 8.11

Genes affected

ATP7A (HGNC:869): (ATPase copper transporting alpha) This gene encodes a transmembrane protein that functions in copper transport across membranes. This protein is localized to the trans Golgi network, where it is predicted to supply copper to copper-dependent enzymes in the secretory pathway. It relocalizes to the plasma membrane under conditions of elevated extracellular copper, and functions in the efflux of copper from cells. Mutations in this gene are associated with Menkes disease, X-linked distal spinal muscular atrophy, and occipital horn syndrome. Alternatively-spliced transcript variants have been observed. [provided by RefSeq, Aug 2013]

PGK1 (HGNC:8896): (phosphoglycerate kinase 1) The protein encoded by this gene is a glycolytic enzyme that catalyzes the conversion of 1,3-diphosphoglycerate to 3-phosphoglycerate. The encoded protein may also act as a cofactor for polymerase alpha. Additionally, this protein is secreted by tumor cells where it participates in angiogenesis by functioning to reduce disulfide bonds in the serine protease, plasmin, which consequently leads to the release of the tumor blood vessel inhibitor angiostatin. The encoded protein has been identified as a moonlighting protein based on its ability to perform mechanistically distinct functions. Deficiency of the enzyme is associated with a wide range of clinical phenotypes hemolytic anemia and neurological impairment. Pseudogenes of this gene have been defined on chromosomes 19, 21 and the X chromosome. [provided by RefSeq, Jan 2014]

ACMG classification

Verdict is Pathogenic. Variant got 16 ACMG points.

• PS1: Transcript NM_000052.7 (ATP7A) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in ClinVar as 210410
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.927
• PP5: Variant X-78011498-G-C is Pathogenic according to our data. Variant chrX-78011498-G-C is described in ClinVar as [Pathogenic]. Clinvar id is 210411.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chrX-78011498-G-C is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ATP7A	NM_000052.7	c.1996G>C	p.Gly666Arg	missense_variant	9/23	ENST00000341514.11
ATP7A	NM_001282224.2	c.1996G>C	p.Gly666Arg	missense_variant	9/22
ATP7A	NR_104109.2	n.285-19902G>C		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ATP7A	ENST00000341514.11	c.1996G>C	p.Gly666Arg	missense_variant	9/23	1	NM_000052.7	P1

Frequencies

GnomAD3 genomes Cov.: 22

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 22

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:3 Uncertain:1

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Menkes kinky-hair syndrome Pathogenic:2 Uncertain:1

Pathogenic, criteria provided, single submitter	clinical testing	Undiagnosed Diseases Network, NIH	Sep 22, 2019	- -
Pathogenic, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Feb 08, 2013	- -
Uncertain significance, no assertion criteria provided	literature only	Inherited Neuropathy Consortium Ii, University Of Miami	Jan 06, 2016	- -

Cutis laxa, X-linked Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Baylor Genetics

Jan 24, 2020

This variant was determined to be pathogenic according to ACMG Guidelines, 2015 [PMID:25741868]. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.97
BayesDel_addAF	Pathogenic	0.55	D
BayesDel_noAF	Pathogenic	0.56
CADD	Pathogenic	26
DANN	Pathogenic	1.0
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.95	D;D
M_CAP	Pathogenic	0.82	D
MetaRNN	Pathogenic	0.93	D;D
MetaSVM	Pathogenic	0.80	D
MutationAssessor	Pathogenic	3.0	M;M
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Uncertain	0.76	T
PROVEAN	Uncertain	-2.8	D;D
REVEL	Pathogenic	0.92
Sift	Benign	0.35	T;D
Sift4G	Benign	0.10	T;T
Polyphen		0.99	.;D
Vest4		0.81
MutPred		0.68		Gain of methylation at G666 (P = 0.0244);Gain of methylation at G666 (P = 0.0244);
MVP		1.0
MPC		0.81
ClinPred		0.99	D
GERP RS		5.6
Varity_R		0.78
gMVP		0.95

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

Publications

LitVar

Other links and lift over

dbSNP: rs797045344; hg19: chrX-77266995;