4-119245430-G-A

Variant names:

• chr4-119245430-G-A
• rs1748106152
• NM_001371395.1:c.237+1G>A

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PVS1_Moderate PM2 PP5_Moderate

The NM_001371395.1(USP53):​c.237+1G>A variant causes a splice donor, intron 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. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Likely pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: USP53 NM_001371395.1 splice_donor, intron
• Scores: Splicing: ADA: 1.000
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 9.48

Genes affected

USP53 (HGNC:29255): (ubiquitin specific peptidase 53) Predicted to enable thiol-dependent deubiquitinase. Predicted to be involved in response to auditory stimulus and sensory perception of sound. Predicted to act upstream of or within action potential and neuron apoptotic process. Predicted to be located in bicellular tight junction. Predicted to be active in cell-cell junction. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PVS1: Splicing +-2 bp (donor or acceptor) variant, product NOT destroyed by NMD, known LOF gene, truncates exone, which is 0.02886406 fraction of the gene. No cryptic splice site detected. Exon removal is inframe change.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 4-119245430-G-A is Pathogenic according to our data. Variant chr4-119245430-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 2671669.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
USP53	NM_001371395.1	c.237+1G>A		splice_donor_variant, intron_variant	Intron 6 of 18	ENST00000692078.1	NP_001358324.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
USP53	ENST00000692078.1	c.237+1G>A		splice_donor_variant, intron_variant	Intron 6 of 18		NM_001371395.1	ENSP00000509606.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Cholestasis, progressive familial intrahepatic, 7, with or without hearing loss Pathogenic:1

Jun 22, 2023

Neuberg Centre For Genomic Medicine, NCGM

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The splice donor c.237+1G>A variant in the USP53 gene has not been reported previously as a pathogenic variant nor as a benign variant, to our knowledge. The variant is novel not in any individuals in gnomAD Exomes and 1000 Genomes. This variant affects the GT donor splice site downstream of exon 6. This variant is predicted to cause a loss of normal protein function through protein truncation. Loss of function variants has been previously reported to be disease causing Zhang et al., 2020. For these reasons, this variant has been classified as Likely Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.46	D
BayesDel_noAF	Pathogenic	0.43
CADD	Pathogenic	32
DANN	Uncertain	1.0
Eigen	Pathogenic	1.2
Eigen_PC	Pathogenic	1.1
FATHMM_MKL	Pathogenic	0.99	D
GERP RS		5.1

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.94
SpliceAI score (max)		0.97		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.97		Position offset: -1

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

Publications

LitVar

Other links and lift over

dbSNP: rs1748106152; hg19: chr4-120166585;