rs797045112

Positions:

• chr15-42983940-A-T

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_174916.3(UBR1):​c.4107T>A​(p.Cys1369Ter) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: UBR1 NM_174916.3 stop_gained
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 0.367

Genes affected

UBR1 (HGNC:16808): (ubiquitin protein ligase E3 component n-recognin 1) The N-end rule pathway is one proteolytic pathway of the ubiquitin system. The recognition component of this pathway, encoded by this gene, binds to a destabilizing N-terminal residue of a substrate protein and participates in the formation of a substrate-linked multiubiquitin chain. This leads to the eventual degradation of the substrate protein. The protein described in this record has a RING-type zinc finger and a UBR-type zinc finger. Mutations in this gene have been associated with Johanson-Blizzard syndrome. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 15-42983940-A-T is Pathogenic according to our data. Variant chr15-42983940-A-T is described in ClinVar as [Pathogenic]. Clinvar id is 208624.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
UBR1	NM_174916.3	c.4107T>A	p.Cys1369Ter	stop_gained	37/47	ENST00000290650.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
UBR1	ENST00000290650.9	c.4107T>A	p.Cys1369Ter	stop_gained	37/47	1	NM_174916.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Johanson-Blizzard syndrome Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Sep 30, 2014

The Cys1369X variant in UBR1 has not been previously reported in individuals with Johanson-Blizzard syndrome (JBS) or in large population studies. This nonsense variant leads to a premature termination codon at position 1369 which is predicted to lead to a truncated or absent protein. Complete loss of UBR1 function is an established disease mechanism in JBS (http://omim.org/entry/605981) .In summary, this variant meets our criteria to be classified as pathogenic for JBS in an autosomal recessive manner (http://personalizedmedicine.partners.org/Laboratory-For-Molecular-Medicine/). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.55
CADD	Pathogenic	36
DANN	Uncertain	0.99
Eigen	Uncertain	0.65
Eigen_PC	Uncertain	0.45
FATHMM_MKL	Uncertain	0.82	D
MutationTaster	Benign	1.0	A;D
Vest4		0.59
GERP RS		1.8

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs797045112; hg19: chr15-43276138;