rs148751804

Variant names:

• chr2-233636584-G-C
• rs148751804
• NM_019075.4:c.62G>C

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BP4_Strong BS2

The NM_019075.4(UGT1A10):​c.62G>C​(p.Gly21Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000854 in 1,614,138 control chromosomes in the GnomAD database, including 3 homozygotes. 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 Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.00069 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00087 (3 hom.)
• Consequence: UGT1A10 NM_019075.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.20
• Publications: 0 publications found

Genes affected

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]

UGT1A (HGNC:12529):

ACMG classification

Our verdict: Benign. The variant received -8 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.02806294).
• BS2: High Homozygotes in GnomAdExome4 at 3 gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
UGT1A10	NM_019075.4	c.62G>C	p.Gly21Ala	missense_variant	Exon 1 of 5	ENST00000344644.10	NP_061948.1
UGT1A8	NM_019076.5	c.855+18022G>C		intron_variant	Intron 1 of 4	ENST00000373450.5	NP_061949.3
UGT1A		n.233636584G>C		intragenic_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
UGT1A10	ENST00000344644.10	c.62G>C	p.Gly21Ala	missense_variant	Exon 1 of 5	1	NM_019075.4	ENSP00000343838.5
UGT1A10	ENST00000373445.1	c.62G>C	p.Gly21Ala	missense_variant	Exon 1 of 5	1		ENSP00000362544.1
UGT1A8	ENST00000373450.5	c.855+18022G>C		intron_variant	Intron 1 of 4	1	NM_019076.5	ENSP00000362549.4

Frequencies

GnomAD3 genomes AF: 0.000690 AC: 105 AN: 152136 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000314

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00125

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.000189

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00101

Gnomad OTH AF: 0.000956

GnomAD2 exomes AF: 0.000660 AC: 166 AN: 251360 AF XY: 0.000655

Gnomad AFR exome AF: 0.0000615

Gnomad AMR exome AF: 0.000491

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000544

Gnomad FIN exome AF: 0.000139

Gnomad NFE exome AF: 0.00122

Gnomad OTH exome AF: 0.000815

GnomAD4 exome AF: 0.000871 AC: 1274 AN: 1461884 Hom.: 3 Cov.: 32 AF XY: 0.000854 AC XY: 621 AN XY: 727242

African (AFR) AF: 0.000209 AC: 7 AN: 33480

American (AMR) AF: 0.000514 AC: 23 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.0000348 AC: 3 AN: 86258

European-Finnish (FIN) AF: 0.000168 AC: 9 AN: 53416

Middle Eastern (MID) AF: 0.000867 AC: 5 AN: 5768

European-Non Finnish (NFE) AF: 0.00108 AC: 1196 AN: 1112006

Other (OTH) AF: 0.000513 AC: 31 AN: 60396

GnomAD4 genome AF: 0.000690 AC: 105 AN: 152254 Hom.: 0 Cov.: 32 AF XY: 0.000631 AC XY: 47 AN XY: 74442

African (AFR) AF: 0.000313 AC: 13 AN: 41554

American (AMR) AF: 0.00124 AC: 19 AN: 15280

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3466

East Asian (EAS) AF: 0.00 AC: 0 AN: 5182

South Asian (SAS) AF: 0.00 AC: 0 AN: 4820

European-Finnish (FIN) AF: 0.000189 AC: 2 AN: 10606

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.00101 AC: 69 AN: 68026

Other (OTH) AF: 0.000946 AC: 2 AN: 2114

Alfa AF: 0.000751 Hom.: 0

Bravo AF: 0.000869

TwinsUK AF: 0.000809 AC: 3

ALSPAC AF: 0.000778 AC: 3

ESP6500AA AF: 0.000227 AC: 1

ESP6500EA AF: 0.00163 AC: 14

ExAC AF: 0.000807 AC: 98

EpiCase AF: 0.00202

EpiControl AF: 0.00113

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

May 20, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.62G>C (p.G21A) alteration is located in exon 1 (coding exon 1) of the UGT1A10 gene. This alteration results from a G to C substitution at nucleotide position 62, causing the glycine (G) at amino acid position 21 to be replaced by an alanine (A). 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	0.093
BayesDel_addAF	Benign	-0.42	T
BayesDel_noAF	Benign	-0.43
CADD	Benign	17
DANN	Benign	0.90
DEOGEN2	Benign	0.27	T;.
Eigen	Benign	0.082
Eigen_PC	Benign	-0.010
FATHMM_MKL	Benign	0.35	N
LIST_S2	Benign	0.54	T;T
M_CAP	Benign	0.011	T
MetaRNN	Benign	0.028	T;T
MetaSVM	Benign	-0.88	T
MutationAssessor	Benign	1.5	L;L
PhyloP100		2.2
PROVEAN	Benign	-1.6	N;D
REVEL	Benign	0.25
Sift	Benign	0.43	T;T
Sift4G	Benign	0.50	T;T
Polyphen		0.96	D;.
Vest4		0.42
MVP		0.57
MPC		0.14
ClinPred		0.045	T
GERP RS		3.8
PromoterAI		0.014	Neutral
Varity_R		0.048
gMVP		0.21
Mutation Taster		=84/16	polymorphism

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

Other links and lift over

dbSNP: rs148751804; hg19: chr2-234545230;