chrX-56565363-C-A

Position:

• chrX-56565363-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM2 PP3 PP5_Moderate

The NM_013444.4(UBQLN2):​c.1490C>A​(p.Pro497His) variant causes a missense change involving the alteration of a non-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 (★).

• Frequency: Genomes: not found (cov: 24)
• Consequence: UBQLN2 NM_013444.4 missense
• Clinical Significance: Pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 1.40

Genes affected

UBQLN2 (HGNC:12509): (ubiquilin 2) This gene encodes an ubiquitin-like protein (ubiquilin) that shares high degree of similarity with related products in yeast, rat and frog. Ubiquilins contain a N-terminal ubiquitin-like domain and a C-terminal ubiquitin-associated domain. They physically associate with both proteasomes and ubiquitin ligases; and thus, are thought to functionally link the ubiquitination machinery to the proteasome to affect in vivo protein degradation. This ubiquilin has also been shown to bind the ATPase domain of the Hsp70-like Stch protein. [provided by RefSeq, Oct 2009]

ACMG classification

Verdict is Uncertain_significance. Variant got 5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.753
• PP5: Variant X-56565363-C-A is Pathogenic according to our data. Variant chrX-56565363-C-A is described in ClinVar as [Pathogenic]. Clinvar id is 29950.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chrX-56565363-C-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
UBQLN2	NM_013444.4	c.1490C>A	p.Pro497His	missense_variant	1/1	ENST00000338222.7	NP_038472.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
UBQLN2	ENST00000338222.7	c.1490C>A	p.Pro497His	missense_variant	1/1		NM_013444.4	ENSP00000345195	P1

Frequencies

GnomAD3 genomes Cov.: 24

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 24

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Amyotrophic lateral sclerosis type 15 Pathogenic:2

Pathogenic, no assertion criteria provided	literature only	OMIM	Aug 21, 2011	- -
Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jun 23, 2021	This sequence change replaces proline with histidine at codon 497 of the UBQLN2 protein (p.Pro497His). The proline residue is moderately conserved and there is a moderate physicochemical difference between proline and histidine. This variant has been observed in individuals with amyotrophic lateral sclerosis (PMID: 21857683, 30348461). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 29950). Algorithms developed to predict the effect of variants on protein structure and function are not available or were not evaluated for this variant. Experimental studies have shown that this variant affects UBQLN2 protein function (PMID: 21857683, 24215460, 25398946). For these reasons, this variant has been classified as Pathogenic. This variant is not present in population databases (ExAC no frequency). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.60
BayesDel_addAF	Pathogenic	0.31	D
BayesDel_noAF	Pathogenic	0.21
CADD	Uncertain	24
DANN	Uncertain	0.98
DEOGEN2	Benign	0.038	T
FATHMM_MKL	Benign	0.74	D
LIST_S2	Uncertain	0.91	D
M_CAP	Pathogenic	0.41	D
MetaRNN	Pathogenic	0.75	D
MetaSVM	Uncertain	0.30	D
MutationAssessor	Benign	0.0	N
MutationTaster	Benign	0.55	D
PrimateAI	Uncertain	0.76	T
PROVEAN	Benign	-0.33	N
REVEL	Uncertain	0.46
Sift	Uncertain	0.018	D
Sift4G	Uncertain	0.011	D
Polyphen		0.99	D
Vest4		0.78
MutPred		0.33		Loss of disorder (P = 0.0576);
MVP		0.97
MPC		0.55
ClinPred		0.47	T
GERP RS		4.2
Varity_R		0.21
gMVP		0.72

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: rs387906709; hg19: chrX-56591796;