rs587784531

Variant names:

• chr15-25371714-AAACTCTTCCAAT-A
• rs587784531
• NM_130839.5:c.448_459delATTGGAAGAGTT

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM4 PP3 PP5_Moderate

The NM_130839.5(UBE3A):​c.448_459delATTGGAAGAGTT​(p.Ile150_Val153del) variant causes a conservative inframe deletion change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. It is difficult to determine the true allele frequency of this variant because it is of type DEL_BIG, and the frequency of such variant types in population databases may be underestimated and unreliable. Variant has been reported in ClinVar as Likely pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: UBE3A NM_130839.5 conservative_inframe_deletion
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 9.32
• Publications: 0 publications found

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

Our verdict: Uncertain_significance. The variant received 5 ACMG points.

• PM4: Nonframeshift variant in NON repetitive region in NM_130839.5.
• PP3: No computational evidence supports a deleterious effect, but strongly conserved according to phyloP
• PP5: Variant 15-25371714-AAACTCTTCCAAT-A is Pathogenic according to our data. Variant chr15-25371714-AAACTCTTCCAAT-A is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 160225.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_130839.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	UBE3A	NM_130839.5	MANE Select	c.448_459delATTGGAAGAGTT	p.Ile150_Val153del	conservative_inframe_deletion	Exon 6 of 13	NP_570854.1
	UBE3A	NM_000462.5		c.457_468delATTGGAAGAGTT	p.Ile153_Val156del	conservative_inframe_deletion	Exon 7 of 14	NP_000453.2
	UBE3A	NM_001354505.1		c.448_459delATTGGAAGAGTT	p.Ile150_Val153del	conservative_inframe_deletion	Exon 6 of 13	NP_001341434.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	UBE3A	ENST00000648336.2	MANE Select	c.448_459delATTGGAAGAGTT	p.Ile150_Val153del	conservative_inframe_deletion	Exon 6 of 13	ENSP00000497572.2
	UBE3A	ENST00000566215.5	TSL:1	c.388_399delATTGGAAGAGTT	p.Ile130_Val133del	conservative_inframe_deletion	Exon 8 of 15	ENSP00000457771.1
	SNHG14	ENST00000424333.6	TSL:1	n.5767-47070_5767-47059delTCTTCCAATAAC		intron	N/A

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Likely pathogenic

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
1	-	-	Angelman syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		9.3
Mutation Taster		=1/199	disease causing (ClinVar)

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs587784531; hg19: chr15-25616861;