3-132665825-G-A

Position:

• chr3-132665825-G-A

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PM1 PM2 PP3_Moderate PP5_Very_Strong

The NM_024818.6(UBA5):​c.164G>A​(p.Arg55His) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000548 in 1,461,038 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R55C) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000055 (0 hom.)
• Consequence: UBA5 NM_024818.6 missense, splice_region
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 7.82

Genes affected

UBA5 (HGNC:23230): (ubiquitin like modifier activating enzyme 5) This gene encodes a member of the E1-like ubiquitin-activating enzyme family. This protein activates ubiquitin-fold modifier 1, a ubiquitin-like post-translational modifier protein, via the formation of a high-energy thioester bond. Alternative splicing results in multiple transcript variants. A pseudogene of this gene has been identified on chromosome 1. [provided by RefSeq, Feb 2016]

NPHP3-ACAD11 (HGNC:):

ACMG classification

Verdict is Pathogenic. Variant got 14 ACMG points.

• PM1: In a helix (size 7) in uniprot entity UBA5_HUMAN there are 5 pathogenic changes around while only 0 benign (100%) in NM_024818.6
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.877
• PP5: Variant 3-132665825-G-A is Pathogenic according to our data. Variant chr3-132665825-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 265746.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr3-132665825-G-A is described in Lovd as [Pathogenic]. Variant chr3-132665825-G-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
UBA5	NM_024818.6	c.164G>A	p.Arg55His	missense_variant, splice_region_variant	2/12	ENST00000356232.10
NPHP3-ACAD11	NR_037804.1	n.3995+16089C>T		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
UBA5	ENST00000356232.10	c.164G>A	p.Arg55His	missense_variant, splice_region_variant	2/12	1	NM_024818.6	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000548 AC: 8 AN: 1461038 Hom.: 0 Cov.: 31 AF XY: 0.00000550 AC XY: 4 AN XY: 726818

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000504

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000450

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Feb 04, 2022	Published functional studies demonstrate reduced UBA5 activity (Muona et al., 2016); Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 27545674, 29286531) -
Pathogenic, criteria provided, single submitter	clinical testing	Invitae	Dec 21, 2021	For these reasons, this variant has been classified as Pathogenic. Experimental studies have shown that this missense change affects UBA5 function (PMID: 27545674). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Not Available"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Not Available"). ClinVar contains an entry for this variant (Variation ID: 265746). This missense change has been observed in individual(s) with early infantile epileptic encephalopathy (PMID: 27545674, 29286531). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. It has also been observed to segregate with disease in related individuals. This variant is present in population databases (rs774318611, gnomAD 0.0009%). This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 55 of the UBA5 protein (p.Arg55His). -

Developmental and epileptic encephalopathy, 44 Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Nov 10, 2020

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.37	D
BayesDel_noAF	Pathogenic	0.29
CADD	Pathogenic	33
DANN	Pathogenic	1.0
DEOGEN2	Uncertain	0.59	D;.;.
Eigen	Pathogenic	0.93
Eigen_PC	Pathogenic	0.92
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	1.0	D;D;D
M_CAP	Benign	0.052	D
MetaRNN	Pathogenic	0.88	D;D;D
MetaSVM	Uncertain	-0.18	T
MutationAssessor	Pathogenic	3.1	M;.;.
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Pathogenic	0.82	D
PROVEAN	Uncertain	-3.9	D;D;D
REVEL	Uncertain	0.62
Sift	Pathogenic	0.0	D;D;D
Sift4G	Pathogenic	0.0	D;D;D
Polyphen		1.0	D;.;D
Vest4		0.80
MutPred		0.76		Gain of glycosylation at Y53 (P = 0.0136);Gain of glycosylation at Y53 (P = 0.0136);Gain of glycosylation at Y53 (P = 0.0136);
MVP		0.69
MPC		0.93
ClinPred		1.0	D
GERP RS		6.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Varity_R		0.83
gMVP		0.97

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs774318611; hg19: chr3-132384669;