Genetic Variant UBALD1:p.Ala102Thr (chr16-4609863-C-T) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 2P and 6B. PM2BP4_StrongBP6_Moderate

The NM_145253.3(UBALD1):c.304G>A(p.Ala102Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000158 in 1,522,812 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A102E) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000017 ( 0 hom. )

Consequence

UBALD1
NM_145253.3 missense

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 0.388

Variant links:

Genes affected

UBALD1 (HGNC:29576): (UBA like domain containing 1)

UBALD1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.053472847).

BP6

Variant 16-4609863-C-T is Benign according to our data. Variant chr16-4609863-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 3812785.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
UBALD1	NM_145253.3 link	c.304G>A	p.Ala102Thr	missense_variant	Exon 3 of 3	ENST00000283474.12	NP_660296.1	Q8TB05-1
UBALD1	NM_001330467.2 link	c.229G>A	p.Ala77Thr	missense_variant	Exon 3 of 3		NP_001317396.1	Q8TB05K7EM88
UBALD1	NM_001411032.1 link	c.*120G>A		3_prime_UTR_variant	Exon 3 of 3		NP_001397961.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
UBALD1	ENST00000283474.12 link	c.304G>A	p.Ala102Thr	missense_variant	Exon 3 of 3	1	NM_145253.3	ENSP00000283474.6		Q8TB05-1

Frequencies

GnomAD3 genomes

AF:

0.00000662

AC:

AN:

151154

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.00

Gnomad OTH

AF:

0.000483

GnomAD2 exomes

AF:

0.00000701

AC:

AN:

142618

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS 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:

0.0000168

AC:

AN:

1371658

Hom.:

Cov.:

AF XY:

0.0000193

AC XY:

AN XY:

672824

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

31402

American (AMR)

AF:

0.00

AC:

AN:

32156

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

21324

East Asian (EAS)

AF:

0.00

AC:

AN:

37714

South Asian (SAS)

AF:

0.0000136

AC:

AN:

73442

European-Finnish (FIN)

AF:

0.00

AC:

AN:

46750

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5420

European-Non Finnish (NFE)

AF:

0.0000197

AC:

AN:

1066834

Other (OTH)

AF:

0.0000177

AC:

AN:

56616

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.473

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00000662

AC:

AN:

151154

Hom.:

Cov.:

AF XY:

0.0000136

AC XY:

AN XY:

73750

show subpopulations

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

40986

American (AMR)

AF:

0.00

AC:

AN:

15166

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3466

East Asian (EAS)

AF:

0.00

AC:

AN:

5114

South Asian (SAS)

AF:

0.00

AC:

AN:

4790

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10508

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67826

Other (OTH)

AF:

0.000483

AC:

AN:

2072

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000113

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Benign:1

Feb 12, 2025

Ambry Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.064

BayesDel_addAF

Benign

-0.26

BayesDel_noAF

Benign

-0.61

CADD

Benign

(source)

DANN

Benign

0.93

DEOGEN2

Benign

0.0017

.;.;T;T;.;.

Eigen

Benign

-1.0

Eigen_PC

Benign

-1.0

FATHMM_MKL

Benign

0.41

LIST_S2

Benign

0.82

T;T;T;T;T;T

M_CAP

Benign

0.022

MetaRNN

Benign

0.053

T;T;T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.20

.;.;N;.;.;.

PhyloP100

0.39

PrimateAI

Uncertain

0.57

PROVEAN

Benign

-0.70

.;.;N;.;.;.

REVEL

Benign

0.018

Sift

Benign

0.24

.;.;T;.;.;.

Sift4G

Benign

0.090

T;T;T;T;T;T

Polyphen

0.0010

.;.;B;B;.;.

Vest4

0.068

MutPred

0.16

.;.;Gain of glycosylation at A102 (P = 7e-04);.;.;.;

MVP

0.10

MPC

0.16

ClinPred

0.047

GERP RS

-1.3

Varity_R

0.026

gMVP

0.22

Mutation Taster

=93/7

polymorphism

(source)

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

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16-4609863-C-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over