chr12-109483643-G-A

Position:

chr12-109483643-G-A

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2BP4_StrongBS1_Supporting

The NM_130466.4(UBE3B):c.92G>A(p.Arg31Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000271 in 1,613,228 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00039 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00026 ( 0 hom. )

Consequence

UBE3B
NM_130466.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.07

Variant links:

Genes affected

UBE3B (HGNC:13478): (ubiquitin protein ligase E3B) The modification of proteins with ubiquitin is an important cellular mechanism for targeting abnormal or short-lived proteins for degradation. Ubiquitination involves at least three classes of enzymes: E1 ubiquitin-activating enzymes, E2 ubiquitin-conjugating enzymes, and E3 ubiquitin-protein ligases. This gene encodes a member of the E3 ubiquitin-conjugating enzyme family which accepts ubiquitin from an E2 ubiquitin-conjugating enzyme and transfers the ubiquitin to the targeted substrates. A HECT (homology to E6-AP C-terminus) domain in the C-terminus of the longer isoform of this protein is the catalytic site of ubiquitin transfer and forms a complex with E2 conjugases. Shorter isoforms of this protein which lack the C-terminal HECT domain are therefore unlikely to bind E2 enzymes. Alternatively spliced transcript variants encoding distinct isoforms have been identified for this gene. [provided by RefSeq, Jul 2012]

UBE3B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.046008646).

BS1

Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.000388 (59/152182) while in subpopulation AMR AF= 0.000851 (13/15278). AF 95% confidence interval is 0.000503. There are 0 homozygotes in gnomad4. There are 35 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
UBE3B	NM_130466.4 linkuse as main transcript	c.92G>A	p.Arg31Gln	missense_variant	3/28	ENST00000342494.8	NP_569733.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
UBE3B	ENST00000342494.8 linkuse as main transcript	c.92G>A	p.Arg31Gln	missense_variant	3/28	1	NM_130466.4	ENSP00000340596	P1	Q7Z3V4-1

Frequencies

GnomAD3 genomes

AF:

0.000388

AC:

AN:

152182

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000851

Gnomad ASJ

AF:

0.000288

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000660

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000544

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000284

AC:

AN:

250296

Hom.:

AF XY:

0.000303

AC XY:

AN XY:

135312

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000584

Gnomad ASJ exome

AF:

0.00160

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000329

Gnomad FIN exome

AF:

0.000278

Gnomad NFE exome

AF:

0.000397

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.000259

AC:

378

AN:

1461046

Hom.:

Cov.:

AF XY:

0.000268

AC XY:

195

AN XY:

726836

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.0000675

Gnomad4 ASJ exome

AF:

0.000920

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.000468

Gnomad4 NFE exome

AF:

0.000278

Gnomad4 OTH exome

AF:

0.000232

GnomAD4 genome

AF:

0.000388

AC:

AN:

152182

Hom.:

Cov.:

AF XY:

0.000471

AC XY:

AN XY:

74336

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000851

Gnomad4 ASJ

AF:

0.000288

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.000660

Gnomad4 NFE

AF:

0.000544

Gnomad4 OTH

AF:

0.000478

Alfa

AF:

0.000446

Hom.:

Bravo

AF:

0.000321

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.000346

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000327

EpiControl

AF:

0.000237

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 24, 2024

This sequence change replaces arginine, which is basic and polar, with glutamine, which is neutral and polar, at codon 31 of the UBE3B protein (p.Arg31Gln). This variant is present in population databases (rs139172208, gnomAD 0.2%). This variant has not been reported in the literature in individuals affected with UBE3B-related conditions. ClinVar contains an entry for this variant (Variation ID: 2110421). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt UBE3B protein function with a negative predictive value of 80%. 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.090

BayesDel_addAF

Benign

-0.42

BayesDel_noAF

Benign

-0.43

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.031

T;.;T;T;.;.;T

Eigen

Uncertain

0.35

Eigen_PC

Uncertain

0.41

FATHMM_MKL

Uncertain

0.94

LIST_S2

Uncertain

0.93

.;.;D;D;.;D;D

M_CAP

Benign

0.017

MetaRNN

Benign

0.046

T;T;T;T;T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.3

L;L;.;L;L;L;.

MutationTaster

Benign

1.0

D;D;D;D;D;D;D

PrimateAI

Benign

0.39

PROVEAN

Benign

0.43

N;N;N;N;N;N;N

REVEL

Benign

0.13

Sift

Benign

0.59

T;T;T;T;T;T;T

Sift4G

Benign

0.56

T;D;T;T;D;D;D

Polyphen

0.13

B;D;.;B;D;D;D

Vest4

0.44

MVP

0.61

MPC

0.33

ClinPred

0.049

GERP RS

5.4

Varity_R

0.16

gMVP

0.28

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