Genetic Variant UPK3B:p.Arg130Trp (chr7-76511809-C-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_001347684.2(UPK3B):c.388C>T(p.Arg130Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000116 in 1,546,548 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 28)

Exomes 𝑓: 0.000011 ( 0 hom. )

Consequence

UPK3B
NM_001347684.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.482

Variant links:

Genes affected

UPK3B (HGNC:21444): (uroplakin 3B) UPK3B is a minor component of the apical plaques of mammalian urothelium that binds and dimerizes with uroplakin-1b (UPK1B; MIM 602380), one of the major conserved urothelium membrane proteins. The other major conserved integral membrane proteins of urothelial plaques are UPK1A (MIM 611557), UPK2 (MIM 611558), and UPK3A (MIM 611559) (Deng et al., 2002 [PubMed 12446744]).[supplied by OMIM, Mar 2008]

UPK3B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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 rank	MANE	Protein	UniProt
UPK3B	NM_001347684.2 link	c.388C>T	p.Arg130Trp	missense_variant	Exon 3 of 6	ENST00000334348.8	NP_001334613.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
UPK3B	ENST00000334348.8 link	c.388C>T	p.Arg130Trp	missense_variant	Exon 3 of 6	2	NM_001347684.2	ENSP00000334938.3		Q9BT76-3

Frequencies

GnomAD3 genomes

AF:

0.0000132

AC:

AN:

152046

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.00

GnomAD3 exomes

AF:

0.0000276

AC:

AN:

145164

Hom.:

AF XY:

0.0000254

AC XY:

AN XY:

78700

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000866

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000450

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000182

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000115

AC:

AN:

1394502

Hom.:

Cov.:

AF XY:

0.00000582

AC XY:

AN XY:

687650

show subpopulations

Gnomad4 AFR exome

AF:

0.0000317

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000503

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000836

Gnomad4 OTH exome

AF:

0.0000348

GnomAD4 genome

AF:

0.0000132

AC:

AN:

152046

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74270

show subpopulations

Gnomad4 AFR

AF:

0.0000242

Gnomad4 AMR

AF:

0.00

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:

0.00

Alfa

AF:

0.0000869

Hom.:

Bravo

AF:

0.0000151

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Oct 25, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.553C>T (p.R185W) alteration is located in exon 2 (coding exon 2) of the UPK3B gene. This alteration results from a C to T substitution at nucleotide position 553, causing the arginine (R) at amino acid position 185 to be replaced by a tryptophan (W). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.29

BayesDel_addAF

Uncertain

0.021

BayesDel_noAF

Uncertain

-0.010

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.28

.;T;.

Eigen

Benign

0.078

Eigen_PC

Benign

-0.041

FATHMM_MKL

Benign

0.23

LIST_S2

Uncertain

0.89

D;D;D

M_CAP

Uncertain

0.23

MetaRNN

Uncertain

0.65

D;D;D

MetaSVM

Benign

-0.39

MutationAssessor

Benign

0.0

.;N;.

PrimateAI

Uncertain

0.72

PROVEAN

Pathogenic

-6.9

D;D;D

REVEL

Uncertain

0.39

Sift

Pathogenic

0.0

D;D;D

Sift4G

Pathogenic

0.0

D;D;D

Polyphen

1.0, 1.0

.;D;D

Vest4

0.68

MutPred

0.68

.;Loss of disorder (P = 0.0096);.;

MVP

0.67

ClinPred

0.54

GERP RS

4.3

Varity_R

0.61

gMVP

0.67

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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