Genetic Variant UBL4B:p.Arg121Cys (chr1-110112895-C-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_203412.2(UBL4B):c.361C>T(p.Arg121Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000415 in 1,612,926 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00012 ( 1 hom., cov: 32)

Exomes 𝑓: 0.000033 ( 0 hom. )

Consequence

UBL4B
NM_203412.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.151

Variant links:

Genes affected

UBL4B (HGNC:32309): (ubiquitin like 4B) Involved in positive regulation of protein targeting to mitochondrion. Predicted to be located in cytoplasm. [provided by Alliance of Genome Resources, Apr 2022]

UBL4B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.03362885).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
UBL4B	NM_203412.2 link	c.361C>T	p.Arg121Cys	missense_variant	Exon 1 of 1	ENST00000334179.5	NP_981957.1	Q8N7F7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
UBL4B	ENST00000334179.5 link	c.361C>T	p.Arg121Cys	missense_variant	Exon 1 of 1	6	NM_203412.2	ENSP00000334044.3		Q8N7F7

Frequencies

GnomAD3 genomes

AF:

0.000125

AC:

AN:

152194

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000720

Gnomad ASJ

AF:

0.000576

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000568

AC:

AN:

246648

Hom.:

AF XY:

0.0000373

AC XY:

AN XY:

133988

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000233

Gnomad ASJ exome

AF:

0.000403

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000181

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000329

AC:

AN:

1460732

Hom.:

Cov.:

AF XY:

0.0000317

AC XY:

AN XY:

726652

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000247

Gnomad4 ASJ exome

AF:

0.000421

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000198

Gnomad4 OTH exome

AF:

0.0000663

GnomAD4 genome

AF:

0.000125

AC:

AN:

152194

Hom.:

Cov.:

AF XY:

0.000161

AC XY:

AN XY:

74354

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.000720

Gnomad4 ASJ

AF:

0.000576

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000508

Hom.:

Bravo

AF:

0.000121

ExAC

AF:

0.0000247

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 25, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.361C>T (p.R121C) alteration is located in exon 1 (coding exon 1) of the UBL4B gene. This alteration results from a C to T substitution at nucleotide position 361, causing the arginine (R) at amino acid position 121 to be replaced by a cysteine (C). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.14

BayesDel_addAF

Benign

-0.36

BayesDel_noAF

Benign

-0.48

CADD

Benign

DANN

Benign

0.97

DEOGEN2

Benign

0.034

Eigen

Benign

-0.69

Eigen_PC

Benign

-0.67

FATHMM_MKL

Benign

0.035

LIST_S2

Benign

0.66

M_CAP

Benign

0.0041

MetaRNN

Benign

0.034

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.4

PrimateAI

Benign

0.25

PROVEAN

Benign

-1.3

REVEL

Benign

0.030

Sift

Benign

0.070

Sift4G

Benign

0.13

Polyphen

0.0060

Vest4

0.083

MutPred

0.34

Gain of methylation at K124 (P = 0.0493);

MVP

0.35

MPC

0.10

ClinPred

0.068

GERP RS

2.2

Varity_R

0.081

gMVP

0.23

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over