2-233636923-T-C

Variant names:

• chr2-233636923-T-C
• NM_019075.4:c.401T>C

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_019075.4(UGT1A10):​c.401T>C​(p.Val134Ala) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: UGT1A10 NM_019075.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.99

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: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.40515918).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
UGT1A10	NM_019075.4	c.401T>C	p.Val134Ala	missense_variant	Exon 1 of 5	ENST00000344644.10	NP_061948.1
UGT1A8	NM_019076.5	c.855+18361T>C		intron_variant	Intron 1 of 4	ENST00000373450.5	NP_061949.3
UGT1A		n.233636923T>C		intragenic_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
UGT1A10	ENST00000344644.10	c.401T>C	p.Val134Ala	missense_variant	Exon 1 of 5	1	NM_019075.4	ENSP00000343838.5
UGT1A10	ENST00000373445.1	c.401T>C	p.Val134Ala	missense_variant	Exon 1 of 5	1		ENSP00000362544.1
UGT1A8	ENST00000373450.5	c.855+18361T>C		intron_variant	Intron 1 of 4	1	NM_019076.5	ENSP00000362549.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Dec 30, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.401T>C (p.V134A) alteration is located in exon 1 (coding exon 1) of the UGT1A10 gene. This alteration results from a T to C substitution at nucleotide position 401, causing the valine (V) at amino acid position 134 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	0.15
BayesDel_addAF	Benign	-0.029	T
BayesDel_noAF	Benign	-0.28
CADD	Benign	22
DANN	Uncertain	0.98
DEOGEN2	Uncertain	0.51	D;.
Eigen	Benign	0.045
Eigen_PC	Benign	-0.066
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Benign	0.78	T;T
M_CAP	Benign	0.018	T
MetaRNN	Benign	0.41	T;T
MetaSVM	Benign	-0.85	T
MutationAssessor	Uncertain	2.5	M;M
PhyloP100		6.0
PROVEAN	Uncertain	-2.8	D;D
REVEL	Benign	0.22
Sift	Uncertain	0.0010	D;D
Sift4G	Uncertain	0.0030	D;D
Polyphen		0.74	P;.
Vest4		0.31
MutPred		0.68		Gain of disorder (P = 0.0562);Gain of disorder (P = 0.0562);
MVP		0.54
MPC		0.069
ClinPred		0.91	D
GERP RS		3.5
PromoterAI		0.00050	Neutral
Varity_R		0.32
gMVP		0.30
Mutation Taster		=68/32	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.050		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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Other links and lift over

hg19: chr2-234545569;