rs1555729503

Variant names:

• chr19-34450307-CTA-C
• rs1555729503
• NM_005499.3:c.816_817delAT

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_005499.3(UBA2):​c.816_817delAT​(p.Trp273AlafsTer13) variant causes a frameshift change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: UBA2 NM_005499.3 frameshift
• Clinical Significance: Pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 7.37

Genes affected

UBA2 (HGNC:30661): (ubiquitin like modifier activating enzyme 2) Posttranslational modification of proteins by the addition of the small protein SUMO (see SUMO1; MIM 601912), or sumoylation, regulates protein structure and intracellular localization. SAE1 (MIM 613294) and UBA2 form a heterodimer that functions as a SUMO-activating enzyme for the sumoylation of proteins (Okuma et al., 1999 [PubMed 9920803]).[supplied by OMIM, Mar 2010]

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 19-34450307-CTA-C is Pathogenic according to our data. Variant chr19-34450307-CTA-C is described in ClinVar as [Pathogenic]. Clinvar id is 521193.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
UBA2	NM_005499.3	c.816_817delAT	p.Trp273AlafsTer13	frameshift_variant	Exon 9 of 17	ENST00000246548.9	NP_005490.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
UBA2	ENST00000246548.9	c.816_817delAT	p.Trp273AlafsTer13	frameshift_variant	Exon 9 of 17	1	NM_005499.3	ENSP00000246548.3

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Pathogenic:1

May 06, 2023

Ambry Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.816_817delAT (p.W273Afs*13) alteration, located in exon 9 (coding exon 9) of the UBA2 gene, consists of a deletion of 2 nucleotides from position 816 to 817, causing a translational frameshift with a predicted alternate stop codon after 13 amino acids. This alteration is expected to result in loss of function by premature protein truncation or nonsense-mediated mRNA decay. This variant was not reported in population-based cohorts in the Genome Aggregation Database (gnomAD). This alteration has been reported to segregate with disease in a family with features of ACCES syndrome (Schnur, 2021). Based on the available evidence, this alteration is classified as pathogenic. -

ACCES syndrome Pathogenic:1

Jul 14, 2022

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Computational scores

Source: dbNSFP v4.3

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: rs1555729503; hg19: chr19-34941212;