2-233729598-G-A
Variant names:
Variant summary
Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP4_Moderate
The NM_019093.4(UGT1A3):c.472G>A(p.Ala158Thr) variant causes a missense change. The variant allele was found at a frequency of 0.0000675 in 1,613,866 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A158V) has been classified as Likely benign.
Frequency
Genomes: 𝑓 0.000033 ( 0 hom., cov: 33)
Exomes 𝑓: 0.000071 ( 0 hom. )
Consequence
UGT1A3
NM_019093.4 missense
NM_019093.4 missense
Scores
2
2
14
Clinical Significance
Conservation
PhyloP100: 6.72
Publications
2 publications found
Genes affected
UGT1A3 (HGNC:12535): (UDP glucuronosyltransferase family 1 member A3) This gene encodes a UDP-glucuronosyltransferase, an enzyme of the glucuronidation pathway that transforms small lipophilic molecules, such as steroids, bilirubin, hormones, and drugs, into water-soluble, excretable metabolites. This gene is part of a complex locus that encodes several UDP-glucuronosyltransferases. The locus includes thirteen unique alternate first exons followed by four common exons. Four of the alternate first exons are considered pseudogenes. Each of the remaining nine 5' exons may be spliced to the four common exons, resulting in nine proteins with different N-termini and identical C-termini. Each first exon encodes the substrate binding site, and is regulated by its own promoter. Substrates of this enzyme include estrone, 2-hydroxyestrone, and metabolites of benzo alpha-pyrene. [provided by RefSeq, Jul 2008]
UGT1A4 (HGNC:12536): (UDP glucuronosyltransferase family 1 member A4) This gene encodes a UDP-glucuronosyltransferase, an enzyme of the glucuronidation pathway that transforms small lipophilic molecules, such as steroids, bilirubin, hormones, and drugs, into water-soluble, excretable metabolites. This gene is part of a complex locus that encodes several UDP-glucuronosyltransferases. The locus includes thirteen unique alternate first exons followed by four common exons. Four of the alternate first exons are considered pseudogenes. Each of the remaining nine 5' exons may be spliced to the four common exons, resulting in nine proteins with different N-termini and identical C-termini. Each first exon encodes the substrate binding site, and is regulated by its own promoter. This enzyme has some glucuronidase activity towards bilirubin, although is is more active on amines, steroids, and sapogenins. [provided by RefSeq, Jul 2008]
UGT1A5 (HGNC:12537): (UDP glucuronosyltransferase family 1 member A5) This gene encodes a UDP-glucuronosyltransferase, an enzyme of the glucuronidation pathway that transforms small lipophilic molecules, such as steroids, bilirubin, hormones, and drugs, into water-soluble, excretable metabolites. This gene is part of a complex locus that encodes several UDP-glucuronosyltransferases. The locus includes thirteen unique alternate first exons followed by four common exons. Four of the alternate first exons are considered pseudogenes. Each of the remaining nine 5' exons may be spliced to the four common exons, resulting in nine proteins with different N-termini and identical C-termini. Each first exon encodes the substrate binding site, and is regulated by its own promoter. [provided by RefSeq, Jul 2008]
UGT1A6 (HGNC:12538): (UDP glucuronosyltransferase family 1 member A6) This gene encodes a UDP-glucuronosyltransferase, an enzyme of the glucuronidation pathway that transforms small lipophilic molecules, such as steroids, bilirubin, hormones, and drugs, into water-soluble, excretable metabolites. This gene is part of a complex locus that encodes several UDP-glucuronosyltransferases. The locus includes thirteen unique alternate first exons followed by four common exons. Four of the alternate first exons are considered pseudogenes. Each of the remaining nine 5' exons may be spliced to the four common exons, resulting in nine proteins with different N-termini and identical C-termini. Each first exon encodes the substrate binding site, and is regulated by its own promoter. The enzyme encoded by this gene is active on phenolic and planar compounds. Alternative splicing in the unique 5' end of this gene results in two transcript variants. [provided by RefSeq, Jul 2008]
UGT1A10 (HGNC:12531): (UDP glucuronosyltransferase family 1 member A10) This gene encodes a UDP-glucuronosyltransferase, an enzyme of the glucuronidation pathway that transforms small lipophilic molecules, such as steroids, bilirubin, hormones, and drugs, into water-soluble, excretable metabolites. This gene is part of a complex locus that encodes several UDP-glucuronosyltransferases. The locus includes thirteen unique alternate first exons followed by four common exons. Four of the alternate first exons are considered pseudogenes. Each of the remaining nine 5' exons may be spliced to the four common exons, resulting in nine proteins with different N-termini and identical C-termini. Each first exon encodes the substrate binding site, and is regulated by its own promoter. The enzyme encoded by this gene has glucuronidase activity on mycophenolic acid, coumarins, and quinolines. [provided by RefSeq, Jul 2008]
UGT1A8 (HGNC:12540): (UDP glucuronosyltransferase family 1 member A8) This gene encodes a UDP-glucuronosyltransferase, an enzyme of the glucuronidation pathway that transforms small lipophilic molecules, such as steroids, bilirubin, hormones, and drugs, into water-soluble, excretable metabolites. This gene is part of a complex locus that encodes several UDP-glucuronosyltransferases. The locus includes thirteen unique alternate first exons followed by four common exons. Four of the alternate first exons are considered pseudogenes. Each of the remaining nine 5' exons may be spliced to the four common exons, resulting in nine proteins with different N-termini and identical C-termini. Each first exon encodes the substrate binding site, and is regulated by its own promoter. The enzyme encoded by this gene has glucuronidase activity with many substrates including coumarins, phenols, anthraquinones, flavones, and some opioids. [provided by RefSeq, Jul 2008]
UGT1A7 (HGNC:12539): (UDP glucuronosyltransferase family 1 member A7) This gene encodes a UDP-glucuronosyltransferase, an enzyme of the glucuronidation pathway that transforms small lipophilic molecules, such as steroids, bilirubin, hormones, and drugs, into water-soluble, excretable metabolites. This gene is part of a complex locus that encodes several UDP-glucuronosyltransferases. The locus includes thirteen unique alternate first exons followed by four common exons. Four of the alternate first exons are considered pseudogenes. Each of the remaining nine 5' exons may be spliced to the four common exons, resulting in nine proteins with different N-termini and identical C-termini. Each first exon encodes the substrate binding site, and is regulated by its own promoter. The enzyme encoded by this gene has moderate glucuronidase activity with phenols. [provided by RefSeq, Jul 2008]
UGT1A9 (HGNC:12541): (UDP glucuronosyltransferase family 1 member A9) This gene encodes a UDP-glucuronosyltransferase, an enzyme of the glucuronidation pathway that transforms small lipophilic molecules, such as steroids, bilirubin, hormones, and drugs, into water-soluble, excretable metabolites. This gene is part of a complex locus that encodes several UDP-glucuronosyltransferases. The locus includes thirteen unique alternate first exons followed by four common exons. Four of the alternate first exons are considered pseudogenes. Each of the remaining nine 5' exons may be spliced to the four common exons, resulting in nine proteins with different N-termini and identical C-termini. Each first exon encodes the substrate binding site, and is regulated by its own promoter. The enzyme encoded by this gene is active on phenols. [provided by RefSeq, Jul 2008]
Genome browser will be placed here
ACMG classification
Classification was made for transcript
Our verdict: Likely_benign. The variant received -2 ACMG points.
BP4
Computational evidence support a benign effect (MetaRNN=0.18831623).
Transcripts
RefSeq
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|
| UGT1A3 | NM_019093.4 | c.472G>A | p.Ala158Thr | missense_variant | Exon 1 of 5 | ENST00000482026.6 | NP_061966.1 | |
| UGT1A4 | NM_007120.3 | c.867+9911G>A | intron_variant | Intron 1 of 4 | ENST00000373409.8 | NP_009051.1 | ||
| UGT1A5 | NM_019078.2 | c.867+15740G>A | intron_variant | Intron 1 of 4 | ENST00000373414.4 | NP_061951.1 | ||
| UGT1A6 | NM_001072.4 | c.861+35733G>A | intron_variant | Intron 1 of 4 | ENST00000305139.11 | NP_001063.2 | ||
| UGT1A10 | NM_019075.4 | c.856-37436G>A | intron_variant | Intron 1 of 4 | ENST00000344644.10 | NP_061948.1 | ||
| UGT1A8 | NM_019076.5 | c.856-37436G>A | intron_variant | Intron 1 of 4 | ENST00000373450.5 | NP_061949.3 | ||
| UGT1A7 | NM_019077.3 | c.856-37436G>A | intron_variant | Intron 1 of 4 | ENST00000373426.4 | NP_061950.2 | ||
| UGT1A9 | NM_021027.3 | c.856-37436G>A | intron_variant | Intron 1 of 4 | ENST00000354728.5 | NP_066307.1 |
Ensembl
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
|---|---|---|---|---|---|---|---|---|---|---|
| UGT1A3 | ENST00000482026.6 | c.472G>A | p.Ala158Thr | missense_variant | Exon 1 of 5 | 1 | NM_019093.4 | ENSP00000418532.1 | ||
| UGT1A4 | ENST00000373409.8 | c.867+9911G>A | intron_variant | Intron 1 of 4 | 1 | NM_007120.3 | ENSP00000362508.4 | |||
| UGT1A5 | ENST00000373414.4 | c.867+15740G>A | intron_variant | Intron 1 of 4 | 1 | NM_019078.2 | ENSP00000362513.3 | |||
| UGT1A6 | ENST00000305139.11 | c.861+35733G>A | intron_variant | Intron 1 of 4 | 1 | NM_001072.4 | ENSP00000303174.6 | |||
| UGT1A10 | ENST00000344644.10 | c.856-37436G>A | intron_variant | Intron 1 of 4 | 1 | NM_019075.4 | ENSP00000343838.5 | |||
| UGT1A9 | ENST00000354728.5 | c.856-37436G>A | intron_variant | Intron 1 of 4 | 1 | NM_021027.3 | ENSP00000346768.4 | |||
| UGT1A7 | ENST00000373426.4 | c.856-37436G>A | intron_variant | Intron 1 of 4 | 1 | NM_019077.3 | ENSP00000362525.3 | |||
| UGT1A8 | ENST00000373450.5 | c.856-37436G>A | intron_variant | Intron 1 of 4 | 1 | NM_019076.5 | ENSP00000362549.4 |
Frequencies
GnomAD3 genomes 0.0000329 AC: 5AN: 152088Hom.: 0 Cov.: 33 show subpopulations
GnomAD3 genomes
AF:
AC:
5
AN:
152088
Hom.:
Cov.:
33
Gnomad AFR
AF:
Gnomad AMI
AF:
Gnomad AMR
AF:
Gnomad ASJ
AF:
Gnomad EAS
AF:
Gnomad SAS
AF:
Gnomad FIN
AF:
Gnomad MID
AF:
Gnomad NFE
AF:
Gnomad OTH
AF:
GnomAD2 exomes AF: 0.0000597 AC: 15AN: 251300 AF XY: 0.0000736 show subpopulations
GnomAD2 exomes
AF:
AC:
15
AN:
251300
AF XY:
Gnomad AFR exome
AF:
Gnomad AMR exome
AF:
Gnomad ASJ exome
AF:
Gnomad EAS exome
AF:
Gnomad FIN exome
AF:
Gnomad NFE exome
AF:
Gnomad OTH exome
AF:
GnomAD4 exome AF: 0.0000711 AC: 104AN: 1461778Hom.: 0 Cov.: 99 AF XY: 0.0000715 AC XY: 52AN XY: 727196 show subpopulations
GnomAD4 exome
AF:
AC:
104
AN:
1461778
Hom.:
Cov.:
99
AF XY:
AC XY:
52
AN XY:
727196
show subpopulations
African (AFR)
AF:
AC:
1
AN:
33474
American (AMR)
AF:
AC:
0
AN:
44718
Ashkenazi Jewish (ASJ)
AF:
AC:
1
AN:
26130
East Asian (EAS)
AF:
AC:
13
AN:
39700
South Asian (SAS)
AF:
AC:
5
AN:
86256
European-Finnish (FIN)
AF:
AC:
0
AN:
53420
Middle Eastern (MID)
AF:
AC:
0
AN:
5764
European-Non Finnish (NFE)
AF:
AC:
78
AN:
1111930
Other (OTH)
AF:
AC:
6
AN:
60386
Allele Balance Distribution
Red line indicates average allele balance
Average allele balance: 0.480
Heterozygous variant carriers
0
9
18
26
35
44
0.00
0.20
0.40
0.60
0.80
0.95
Allele balance
GnomAD4 genome 0.0000329 AC: 5AN: 152088Hom.: 0 Cov.: 33 AF XY: 0.0000135 AC XY: 1AN XY: 74300 show subpopulations
GnomAD4 genome
AF:
AC:
5
AN:
152088
Hom.:
Cov.:
33
AF XY:
AC XY:
1
AN XY:
74300
show subpopulations
African (AFR)
AF:
AC:
2
AN:
41388
American (AMR)
AF:
AC:
0
AN:
15270
Ashkenazi Jewish (ASJ)
AF:
AC:
0
AN:
3470
East Asian (EAS)
AF:
AC:
1
AN:
5194
South Asian (SAS)
AF:
AC:
0
AN:
4828
European-Finnish (FIN)
AF:
AC:
0
AN:
10584
Middle Eastern (MID)
AF:
AC:
0
AN:
316
European-Non Finnish (NFE)
AF:
AC:
2
AN:
68036
Other (OTH)
AF:
AC:
0
AN:
2090
Allele Balance Distribution
Red line indicates average allele balance
Average allele balance: 0.545
Heterozygous variant carriers
0
1
1
2
2
3
0.00
0.20
0.40
0.60
0.80
0.95
Allele balance
Alfa
AF:
Hom.:
Bravo
AF:
TwinsUK
AF:
AC:
0
ALSPAC
AF:
AC:
1
ExAC
AF:
AC:
9
Asia WGS
AF:
AC:
1
AN:
3478
EpiCase
AF:
EpiControl
AF:
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
not specified Uncertain:1
Jun 08, 2025
Ambry Genetics
Significance:Uncertain significance
Review Status:criteria provided, single submitter
Collection Method:clinical testing
The c.472G>A (p.A158T) alteration is located in exon 1 (coding exon 1) of the UGT1A3 gene. This alteration results from a G to A substitution at nucleotide position 472, causing the alanine (A) at amino acid position 158 to be replaced by a threonine (T). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
BayesDel_addAF
Benign
T
BayesDel_noAF
Benign
DANN
Uncertain
DEOGEN2
Benign
T
Eigen
Benign
Eigen_PC
Benign
FATHMM_MKL
Uncertain
D
LIST_S2
Benign
T
M_CAP
Benign
D
MetaRNN
Benign
T
MetaSVM
Benign
T
MutationAssessor
Benign
N
PhyloP100
PROVEAN
Benign
N
REVEL
Benign
Sift
Pathogenic
D
Sift4G
Pathogenic
D
Polyphen
B
Vest4
MVP
MPC
ClinPred
T
GERP RS
Varity_R
gMVP
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at
Publications
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