12-109533505-G-T

Position:

• chr12-109533505-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The ENST00000342494.8(UBE3B):​c.2962G>T​(p.Ala988Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,784 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A988T) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: UBE3B ENST00000342494.8 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 9.46

Genes affected

UBE3B (HGNC:13478): (ubiquitin protein ligase E3B) The modification of proteins with ubiquitin is an important cellular mechanism for targeting abnormal or short-lived proteins for degradation. Ubiquitination involves at least three classes of enzymes: E1 ubiquitin-activating enzymes, E2 ubiquitin-conjugating enzymes, and E3 ubiquitin-protein ligases. This gene encodes a member of the E3 ubiquitin-conjugating enzyme family which accepts ubiquitin from an E2 ubiquitin-conjugating enzyme and transfers the ubiquitin to the targeted substrates. A HECT (homology to E6-AP C-terminus) domain in the C-terminus of the longer isoform of this protein is the catalytic site of ubiquitin transfer and forms a complex with E2 conjugases. Shorter isoforms of this protein which lack the C-terminal HECT domain are therefore unlikely to bind E2 enzymes. Alternatively spliced transcript variants encoding distinct isoforms have been identified for this gene. [provided by RefSeq, Jul 2012]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
UBE3B	NM_130466.4	c.2962G>T	p.Ala988Ser	missense_variant	27/28	ENST00000342494.8	NP_569733.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
UBE3B	ENST00000342494.8	c.2962G>T	p.Ala988Ser	missense_variant	27/28	1	NM_130466.4	ENSP00000340596	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461784 Hom.: 0 Cov.: 31 AF XY: 0.00000413 AC XY: 3 AN XY: 727196

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000270

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.094
BayesDel_addAF	Uncertain	0.031	T
BayesDel_noAF	Benign	-0.19
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Benign	0.089	T;T;.
Eigen	Uncertain	0.49
Eigen_PC	Uncertain	0.58
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.92	.;D;D
M_CAP	Benign	0.039	D
MetaRNN	Uncertain	0.70	D;D;D
MetaSVM	Benign	-0.74	T
MutationAssessor	Benign	1.2	L;L;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.81	D
PROVEAN	Benign	-1.9	N;N;.
REVEL	Benign	0.20
Sift	Benign	0.074	T;T;.
Sift4G	Benign	0.18	T;T;T
Polyphen		0.98	D;D;.
Vest4		0.63
MutPred		0.55		Loss of catalytic residue at A988 (P = 0.005);Loss of catalytic residue at A988 (P = 0.005);.;
MVP		0.72
MPC		0.80
ClinPred		0.90	D
GERP RS		5.3
Varity_R		0.24
gMVP		0.48

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: rs753221661; hg19: chr12-109971310;