rs61734190

Positions:

• chr15-25371801-A-G

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BA1

This summary comes from the ClinGen Evidence Repository: The allele frequency of the c.313T>C p.(Leu105=) variant in UBE3A (NM_130838.2) is 7.5% in African/African-American 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). In summary, the c.313T>C p.(Leu105=) variant in UBE3A is classified as Benign based on the ACMG/AMP criteria (BA1). LINK:https://erepo.genome.network/evrepo/ui/classification/CA149410/MONDO:0007113/016

• Frequency:
  • Genomes: 𝑓 0.021 (120 hom., cov: 32)
  • Exomes 𝑓: 0.0021 (100 hom.)
• Consequence: UBE3A NM_130839.5 synonymous
• Clinical Significance: Benign reviewed by expert panel U:1 B:6
• Conservation: PhyloP100: 3.35

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 -8 ACMG points.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
UBE3A	NM_130839.5	c.373T>C	p.Leu125=	synonymous_variant	6/13	ENST00000648336.2
SNHG14	NR_146177.1	n.18393-19795A>G		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
UBE3A	ENST00000648336.2	c.373T>C	p.Leu125=	synonymous_variant	6/13		NM_130839.5	P1
SNHG14	ENST00000656420.1	n.5457-46987A>G		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes AF: 0.0213 AC: 3247 AN: 152146 Hom.: 120 Cov.: 32

Gnomad AFR AF: 0.0737

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00963

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000414

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000191

Gnomad OTH AF: 0.0167

GnomAD3 exomes AF: 0.00561 AC: 1380 AN: 245968 Hom.: 51 AF XY: 0.00423 AC XY: 565 AN XY: 133678

Gnomad AFR exome AF: 0.0762

Gnomad AMR exome AF: 0.00457

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000546

Gnomad SAS exome AF: 0.0000985

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000178

Gnomad OTH exome AF: 0.00433

GnomAD4 exome AF: 0.00206 AC: 2999 AN: 1456882 Hom.: 100 Cov.: 32 AF XY: 0.00174 AC XY: 1265 AN XY: 724966

Gnomad4 AFR exome AF: 0.0700

Gnomad4 AMR exome AF: 0.00536

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000581

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000990

Gnomad4 OTH exome AF: 0.00489

GnomAD4 genome AF: 0.0214 AC: 3251 AN: 152264 Hom.: 120 Cov.: 32 AF XY: 0.0205 AC XY: 1524 AN XY: 74442

Gnomad4 AFR AF: 0.0736

Gnomad4 AMR AF: 0.00962

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000191

Gnomad4 OTH AF: 0.0165

Alfa AF: 0.00630 Hom.: 10

Bravo AF: 0.0235

Asia WGS AF: 0.00346 AC: 12 AN: 3478

EpiCase AF: 0.000164

EpiControl AF: 0.000178

ClinVar

Significance: Benign

Submissions summary: Uncertain:1 Benign:6

Revision: reviewed by expert panel

Submissions by phenotype

Angelman syndrome Uncertain:1 Benign:2

Benign, criteria provided, single submitter	clinical testing	Invitae	Feb 01, 2024	- -
Benign, reviewed by expert panel	curation	ClinGen Rett and Angelman-like Disorders Variant Curation Expert Panel	Jun 30, 2022	The allele frequency of the c.313T>C p.(Leu105=) variant in UBE3A (NM_130838.2) is 7.5% in African/African-American 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). In summary, the c.313T>C p.(Leu105=) variant in UBE3A is classified as Benign based on the ACMG/AMP criteria (BA1). -
Uncertain significance, no assertion criteria provided	clinical testing	Baylor Genetics	Feb 14, 2014	possible diagnosis of Angelman syndrome -

not specified Benign:3

Benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Mar 13, 2015	- -
Benign, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Feb 08, 2013	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Jun 20, 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. -

Inborn genetic diseases Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 16, 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	-0.59
CADD	Benign	7.0
DANN	Benign	0.74

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs61734190; hg19: chr15-25616948;