rs150331504

Variant names:

• chr15-25370770-T-C
• rs150331504
• NM_130839.5:c.1404A>G

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP7 BA1

This summary comes from the ClinGen Evidence Repository: The allele frequency of the p.Thr448= variant in UBE3A is 1.9% in the East Asian sub population in gnomAD, which is high enough to be classified as benign based on thresholds defined by the ClinGen Rett/Angelman-like Expert Panel for Rett/AS-like conditions (BA1). The silent p.Thr448= variant is not predicted to affect splicing using multiple computational tools and does not affect a highly conserved nucleotide (BP7). In summary, the p.Thr448= variant in UBE3A is classified as benign based on the ACMG/AMP criteria (BA1, BP7). LINK:https://erepo.genome.network/evrepo/ui/classification/CA202443/MONDO:0007113/016

• Frequency:
  • Genomes: 𝑓 0.00082 (4 hom., cov: 32)
  • Exomes 𝑓: 0.00038 (6 hom.)
• Consequence: UBE3A NM_130839.5 synonymous
• Clinical Significance: Benign reviewed by expert panel U:1 B:6
• Conservation: PhyloP100: -0.150

Genes affected

UBE3A (HGNC:12496): (ubiquitin protein ligase E3A) This gene encodes an E3 ubiquitin-protein ligase, part of the ubiquitin protein degradation system. This imprinted gene is maternally expressed in brain and biallelically expressed in other tissues. Maternally inherited deletion of this gene causes Angelman Syndrome, characterized by severe motor and intellectual retardation, ataxia, hypotonia, epilepsy, absence of speech, and characteristic facies. The protein also interacts with the E6 protein of human papillomavirus types 16 and 18, resulting in ubiquitination and proteolysis of tumor protein p53. Alternative splicing of this gene results in three transcript variants encoding three isoforms with different N-termini. Additional transcript variants have been described, but their full length nature has not been determined. [provided by RefSeq, Jul 2008]

SNHG14 (HGNC:37462): (small nucleolar RNA host gene 14) This gene is located within the Prader-Willi critical region and produces a long, spliced paternally-imprinted RNA that initiates within a common upstream promoter region shared by the SNRPN (small nuclear ribonucleoprotein polypeptide N) and SNURF genes. This transcript serves as a host RNA for the small nucleolar RNA, C/D box 115 and 116 clusters. This RNA extends in antisense into the region of the ubiquitin protein ligase E3A gene (UBE3A), and is thought to regulate imprinted expression of UBE3A in the brain. This transcript undergoes extensive alternative splicing, and may initiate and terminate at multiple locations within this genomic region. The full-length structure of all splice forms is not determined. [provided by RefSeq, Mar 2017]

ACMG classification

Verdict is Benign. Variant got -9 ACMG points.

• BP7: For more information check the summary or visit ClinGen Evidence Repository.
• BA1: For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
UBE3A	NM_130839.5	c.1404A>G	p.Thr468Thr	synonymous_variant	Exon 6 of 13	ENST00000648336.2	NP_570854.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
UBE3A	ENST00000648336.2	c.1404A>G	p.Thr468Thr	synonymous_variant	Exon 6 of 13		NM_130839.5	ENSP00000497572.2

Frequencies

GnomAD3 genomes AF: 0.000814 AC: 124 AN: 152258 Hom.: 4 Cov.: 32

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000654

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.0219

Gnomad SAS AF: 0.00165

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.00141 AC: 353 AN: 250388 Hom.: 3 AF XY: 0.00128 AC XY: 173 AN XY: 135566

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000145

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0184

Gnomad SAS exome AF: 0.000229

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.000493

GnomAD4 exome AF: 0.000381 AC: 557 AN: 1461780 Hom.: 6 Cov.: 32 AF XY: 0.000364 AC XY: 265 AN XY: 727190

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.000112

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0121

Gnomad4 SAS exome AF: 0.000394

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000360

Gnomad4 OTH exome AF: 0.000580

GnomAD4 genome AF: 0.000820 AC: 125 AN: 152376 Hom.: 4 Cov.: 32 AF XY: 0.000926 AC XY: 69 AN XY: 74516

Gnomad4 AFR AF: 0.0000240

Gnomad4 AMR AF: 0.0000653

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.0222

Gnomad4 SAS AF: 0.00166

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000167 Hom.: 0

Bravo AF: 0.000601

Asia WGS AF: 0.00289 AC: 10 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Uncertain:1 Benign:6

Revision: reviewed by expert panel

Submissions by phenotype

Angelman syndrome Uncertain:1 Benign:2

Jan 30, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Mar 26, 2021

ClinGen Rett and Angelman-like Disorders Variant Curation Expert Panel

Significance: Benign

Review Status: reviewed by expert panel

Collection Method: curation

The allele frequency of the p.Thr448= variant in UBE3A is 1.9% in the East Asian sub population in gnomAD, which is high enough to be classified as benign based on thresholds defined by the ClinGen Rett/Angelman-like Expert Panel for Rett/AS-like conditions (BA1). The silent p.Thr448= variant is not predicted to affect splicing using multiple computational tools and does not affect a highly conserved nucleotide (BP7). In summary, the p.Thr448= variant in UBE3A is classified as benign based on the ACMG/AMP criteria (BA1, BP7). -

Feb 14, 2014

Baylor Genetics

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

possible diagnosis of Angelman syndrome -

not specified Benign:3

Jan 07, 2016

Eurofins Ntd Llc (ga)

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jun 14, 2016

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Aug 10, 2015

Genetic Services Laboratory, University of Chicago

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Inborn genetic diseases Benign:1

Nov 09, 2016

Ambry Genetics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.58
CADD	Benign	6.0
DANN	Benign	0.82
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.7

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: rs150331504; hg19: chr15-25615917;