rs150331504

Positions:

chr15-25370770-T-C

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BA1BP7

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

Scores

Clinical Significance

Benign reviewed by expert panel U:1B:6

Conservation

PhyloP100: -0.150

Variant links:

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]

UBE3A links:

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]

SNHG14 links:

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -9 ACMG points.

BP7

BA1

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
UBE3A	NM_130839.5 linkuse as main transcript	c.1404A>G	p.Thr468=	synonymous_variant	6/13	ENST00000648336.2
SNHG14	NR_146177.1 linkuse as main transcript	n.18393-20826T>C		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
UBE3A	ENST00000648336.2 linkuse as main transcript	c.1404A>G	p.Thr468=	synonymous_variant	6/13		NM_130839.5	P1	Q05086-3
SNHG14	ENST00000656420.1 linkuse as main transcript	n.5457-48018T>C		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes

AF:

0.000814

AC:

124

AN:

152258

Hom.:

Cov.:

show subpopulations

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.:

AF XY:

0.00128

AC XY:

173

AN XY:

135566

show subpopulations

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.:

Cov.:

AF XY:

0.000364

AC XY:

265

AN XY:

727190

show subpopulations

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.:

Cov.:

AF XY:

0.000926

AC XY:

AN XY:

74516

show subpopulations

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.:

Bravo

AF:

0.000601

Asia WGS

AF:

0.00289

AC:

AN:

3478

ClinVar

Significance: Benign

Submissions summary: Uncertain:1Benign:6

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

Angelman syndrome

Uncertain:1Benign:2

Benign, reviewed by expert panel	curation	ClinGen Rett and Angelman-like Disorders Variant Curation Expert Panel	Mar 26, 2021	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). -
Uncertain significance, no assertion criteria provided	clinical testing	Baylor Genetics	Feb 14, 2014	possible diagnosis of Angelman syndrome -
Benign, criteria provided, single submitter	clinical testing	Invitae	Feb 01, 2024	- -

not specified

Benign:3

Benign, criteria provided, single submitter	clinical testing	GeneDx	Jun 14, 2016	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. -
Benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jan 07, 2016	- -
Benign, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Aug 10, 2015	- -

Inborn genetic diseases

Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 09, 2016

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

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