chrX-56565363-C-T

Variant names:

• chrX-56565363-C-T
• rs387906709
• NM_013444.4:c.1490C>T

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PM5

The NM_013444.4(UBQLN2):​c.1490C>T​(p.Pro497Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P497R) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 24)
• Consequence: UBQLN2 NM_013444.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter P:1 U:1
• Conservation: PhyloP100: 1.40
• Publications: 66 publications found

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]

UBQLN2 Gene-Disease associations (from GenCC):

• amyotrophic lateral sclerosis type 15

  Inheritance: XL Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Ambry Genetics, ClinGen, Labcorp Genetics (formerly Invitae), Genomics England PanelApp
• amyotrophic lateral sclerosis

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chrX-56565362-C-T is described in ClinVar as Pathogenic. ClinVar VariationId is 29951.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
UBQLN2	NM_013444.4	c.1490C>T	p.Pro497Leu	missense_variant	Exon 1 of 1	ENST00000338222.7	NP_038472.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
UBQLN2	ENST00000338222.7	c.1490C>T	p.Pro497Leu	missense_variant	Exon 1 of 1	6	NM_013444.4	ENSP00000345195.5

Frequencies

GnomAD3 genomes Cov.: 24

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 24

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1 Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Amyotrophic lateral sclerosis type 15 Pathogenic:1 Uncertain:1

Jun 12, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. This variant disrupts the p.Pro497 amino acid residue in UBQLN2. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 21857683, 24215460, 25398946, 30348461). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. ClinVar contains an entry for this variant (Variation ID: 157594). This missense change has been observed in individual(s) with amyotrophic lateral sclerosis (PMID: 24771548). It has also been observed to segregate with disease in related individuals. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 497 of the UBQLN2 protein (p.Pro497Leu). -

May 01, 2014

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.76
BayesDel_addAF	Uncertain	0.15	D
BayesDel_noAF	Uncertain	-0.020
CADD	Uncertain	24
DANN	Benign	0.95
DEOGEN2	Benign	0.047	T
FATHMM_MKL	Benign	0.60	D
LIST_S2	Uncertain	0.97	D
M_CAP	Pathogenic	0.30	D
MetaRNN	Uncertain	0.44	T
MetaSVM	Uncertain	-0.19	T
MutationAssessor	Benign	0.0	N
PhyloP100		1.4
PrimateAI	Uncertain	0.78	T
PROVEAN	Benign	-0.28	N
REVEL	Uncertain	0.49
Sift	Benign	0.12	T
Sift4G	Uncertain	0.046	D
Polyphen		0.0020	B
Vest4		0.59
MutPred		0.41		Loss of disorder (P = 0.0338);
MVP		0.97
MPC		0.48
ClinPred		0.32	T
GERP RS		4.2
Varity_R		0.13
gMVP		0.80
Mutation Taster		=14/86	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs387906709; hg19: chrX-56591796;