Evidence Repository - Clinical Genome Resources

The ClinGen Evidence Repository is an FDA-recognized human genetic variant database containing expert-curated assertions regarding variants' pathogenicity and supporting evidence summaries. [Disclaimer]

Variant: NM_130838.1(UBE3A):c.317C>A (p.Thr106Lys)

CA333390

155994 (ClinVar)

Gene: UBE3A (HGNC:7337)

Condition: Angelman syndrome (MONDO:0007113)

Inheritance Mode: Autosomal dominant inheritance (with paternal imprinting (HP:0012274))

UUID: ab249ad8-9000-4fe3-b765-33904af0119f

Approved on: 2021-03-26

Published on: 2021-05-17

HGVS expressions

NM_130838.1(UBE3A):c.317C>A (p.Thr106Lys)

NM_130838.1:c.317C>A

ENST00000438097.6:c.317C>A

ENST00000625778.3:c.317C>A

ENST00000635914.1:c.317C>A

ENST00000637886.1:c.377C>A

ENST00000638011.1:c.317C>A

ENST00000638155.1:c.317C>A

ENST00000648336.2:c.377C>A

ENST00000649550.1:c.317C>A

ENST00000650110.1:c.386C>A

ENST00000675000.1:n.1052C>A

ENST00000675177.1:c.200C>A

ENST00000675593.1:n.3073C>A

ENST00000232165.7:c.317C>A

ENST00000397954.6:c.386C>A

ENST00000428984.6:c.317C>A

ENST00000438097.5:c.317C>A

ENST00000566215.5:c.317C>A

ENST00000614096.4:c.377C>A

ENST00000625778.2:c.317C>A

ENST00000626068.2:c.398C>A

ENST00000626793.2:n.428C>A

ENST00000628733.2:c.377C>A

ENST00000630424.2:c.317C>A

ENST00000630907.2:c.377C>A

NM_000462.3:c.386C>A

NM_130839.2:c.377C>A

NM_000462.5:c.386C>A

NM_001354505.1:c.377C>A

NM_001354506.1:c.317C>A

NM_001354507.1:c.317C>A

NM_001354508.1:c.317C>A

NM_001354509.1:c.317C>A

NM_001354511.1:c.317C>A

NM_001354512.1:c.317C>A

NM_001354513.1:c.317C>A

NM_001354523.1:c.317C>A

NM_001354526.1:c.317C>A

NM_001354538.1:c.377C>A

NM_001354539.1:c.317C>A

NM_001354540.1:c.317C>A

NM_001354541.1:c.317C>A

NM_001354542.1:c.317C>A

NM_001354543.1:c.317C>A

NM_001354544.1:c.317C>A

NM_001354545.1:c.377C>A

NM_001354546.1:c.200C>A

NM_001354547.1:c.317C>A

NM_001354548.1:c.317C>A

NM_001354549.1:c.317C>A

NM_001354550.1:c.361+3668C>A

NM_001354551.1:c.301+3668C>A

NM_130838.3:c.317C>A

NM_130839.4:c.377C>A

NR_146177.1:n.18393-19799G>T

NR_148916.1:n.925C>A

NM_001354506.2:c.317C>A

NM_001354507.2:c.317C>A

NM_001354508.2:c.317C>A

NM_001354509.2:c.317C>A

NM_001354511.2:c.317C>A

NM_001354512.2:c.317C>A

NM_001354513.2:c.317C>A

NM_001354523.2:c.317C>A

NM_001354538.2:c.377C>A

NM_001354539.2:c.317C>A

NM_001354540.2:c.317C>A

NM_001354541.2:c.317C>A

NM_001354542.2:c.317C>A

NM_001354543.2:c.317C>A

NM_001354544.2:c.317C>A

NM_001354545.2:c.377C>A

NM_001354546.2:c.200C>A

NM_001354547.2:c.317C>A

NM_001354548.2:c.317C>A

NM_001354549.2:c.317C>A

NM_001354550.2:c.361+3668C>A

NM_001354551.2:c.301+3668C>A

NM_001374461.1:c.317C>A

NM_130838.4:c.317C>A

NM_130839.5:c.377C>A

NR_148916.2:n.893C>A

NC_000015.10:g.25371797G>T

CM000677.2:g.25371797G>T

NC_000015.9:g.25616944G>T

CM000677.1:g.25616944G>T

NC_000015.8:g.23168037G>T

NG_009268.1:g.72185C>A

Pathogenic

PM5 PP1_Strong PP3 PS4_Supporting PM2_Supporting PS3_Supporting

Evidence Links 2

Expert Panel

Rett and Angelman-like Disorders VCEP

Criteria Specification Information

Criteria Specifications for this VCEP

Evidence submitted by expert panel

Rett and Angelman-like Disorders VCEP

The variant has been reported to segregate in at least five informative meioses (PMID 25212744, internal database) (PP1_Strong). A pathogenic missense variant (p.Thr106Pro) has been previously identified within this codon which indicates that this residue is critical to the function of the protein (PMID 15054837) (PM5). Protein expression analysis in transfected cell lines has shown that this variant reduces protein function (PMID 26255772) PS3_Supporting). The p.Thr106Lys variant has been observed in at least 1 other individual with Angelman syndrome (PMID 25212744) (PS4_Supporting). The p.Thr106Lys variant in UBE3A is absent from gnomAD (PM2_Supporting). Computational prediction analysis tools suggests a deleterious impact; however, this information does not predict clinical significance on its own (PP3). In summary, the p.Thr106Lys variant in UBE3A is classified as pathogenic for Angelman syndrome based on the ACMG/AMP criteria (PP1_strong, PM5, PS3_supporting, PS4_supporting, PM2_supporting, PP3).

PM5

A pathogenic missense variant (p.Thr106Pro) has been previously identified within this codon which indicates that this residue is critical to the function of the protein (PMID 15054837)

PP1_Strong

The variant has been reported to segregate in at least five informative meioses (PMID 25212744, internal database).

Review of UBE3A variants identified in a cohort of 2515 AS patients. Variant was identified identified in one proband, found to be maternally inherited, and was present in proband’s affected sister and in two affected maternal cousins. PubMed:25212744

PP3

Computational prediction analysis tools suggests a deleterious impact; however, this information does not predict clinical significance on its own

PS4_Supporting

The p.Thr106Lys variant has been observed in at least 1 other individual with Angelman syndrome (PMID 25212744)

PM2_Supporting

The p.Thr106Lys variant in UBE3A is absent from gnomAD

PS3_Supporting

Protein expression analysis in transfected cell lines has shown that this variant reduces protein function (PMID 26255772)

Protein expression analysis in transfected cell lines found that protein levels were significantly lower than wild type UBE3A, suggesting that this variant promotes hyperactive self-degradation of UBE3A, a novel gain-of-function mechanism that reduces UBE3A level (see Figure S1B-E, Table S1). PubMed:26255772

Curation History

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