22-24495465-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_016327.3(UPB1):c.62A>T(p.Asp21Val) variant causes a missense change. The variant allele was found at a frequency of 0.0000762 in 1,613,956 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00053 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000029 ( 0 hom. )

Consequence

UPB1
NM_016327.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 5.87

Variant links:

Genes affected

UPB1 (HGNC:16297): (beta-ureidopropionase 1) This gene encodes a protein that belongs to the CN hydrolase family. Beta-ureidopropionase catalyzes the last step in the pyrimidine degradation pathway. The pyrimidine bases uracil and thymine are degraded via the consecutive action of dihydropyrimidine dehydrogenase (DHPDH), dihydropyrimidinase (DHP) and beta-ureidopropionase (UP) to beta-alanine and beta-aminoisobutyric acid, respectively. UP deficiencies are associated with N-carbamyl-beta-amino aciduria and may lead to abnormalities in neurological activity. [provided by RefSeq, Jul 2008]

UPB1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.07654318).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
UPB1	NM_016327.3 linkuse as main transcript	c.62A>T	p.Asp21Val	missense_variant	1/10	ENST00000326010.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
UPB1	ENST00000326010.10 linkuse as main transcript	c.62A>T	p.Asp21Val	missense_variant	1/10	1	NM_016327.3	P1
UPB1	ENST00000382760.2 linkuse as main transcript	c.62A>T	p.Asp21Val	missense_variant	1/4	5
UPB1	ENST00000415388.5 linkuse as main transcript	c.62A>T	p.Asp21Val	missense_variant, NMD_transcript_variant	1/9	5

Frequencies

GnomAD3 genomes

AF:

0.000526

AC:

AN:

152182

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00183

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000518

AC:

AN:

250878

Hom.:

AF XY:

0.0000442

AC XY:

AN XY:

135652

show subpopulations

Gnomad AFR exome

AF:

0.000739

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000294

AC:

AN:

1461774

Hom.:

Cov.:

AF XY:

0.0000289

AC XY:

AN XY:

727192

show subpopulations

Gnomad4 AFR exome

AF:

0.00114

Gnomad4 AMR exome

AF:

0.0000224

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:

0.00

Gnomad4 OTH exome

AF:

0.0000662

GnomAD4 genome

AF:

0.000526

AC:

AN:

152182

Hom.:

Cov.:

AF XY:

0.000551

AC XY:

AN XY:

74344

show subpopulations

Gnomad4 AFR

AF:

0.00183

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.000478

Alfa

AF:

0.0000503

Hom.:

Bravo

AF:

0.000502

ESP6500AA

AF:

0.00159

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000988

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 24, 2023

The c.62A>T (p.D21V) alteration is located in exon 1 (coding exon 1) of the UPB1 gene. This alteration results from a A to T substitution at nucleotide position 62, causing the aspartic acid (D) at amino acid position 21 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Apr 22, 2022

This sequence change replaces aspartic acid, which is acidic and polar, with valine, which is neutral and non-polar, at codon 21 of the UPB1 protein (p.Asp21Val). This variant is present in population databases (rs148926761, gnomAD 0.1%). This variant has not been reported in the literature in individuals affected with UPB1-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C15"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.089

BayesDel_addAF

Benign

-0.26

BayesDel_noAF

Benign

-0.16

Cadd

Benign

Dann

Uncertain

0.99

DEOGEN2

Benign

0.41

T;.

Eigen

Benign

-0.24

Eigen_PC

Benign

-0.19

FATHMM_MKL

Uncertain

0.93

LIST_S2

Uncertain

0.93

D;D

M_CAP

Benign

0.032

MetaRNN

Benign

0.077

T;T

MetaSVM

Benign

-0.50

MutationAssessor

Uncertain

2.4

M;.

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Benign

0.39

PROVEAN

Uncertain

-3.1

D;D

REVEL

Uncertain

0.30

Sift

Benign

0.12

T;T

Sift4G

Benign

0.16

T;D

Polyphen

0.0020

B;.

Vest4

0.35

MVP

0.71

MPC

0.18

ClinPred

0.11

GERP RS

5.1

Varity_R

0.19

gMVP

0.66

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over