rs873478

Positions:

• chr2-233760224-G-C

Variant summary

Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP4_Strong BP6 BS1 BS2

The NM_007120.3(UGT1A4):​c.868-6810G>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00132 in 1,586,308 control chromosomes in the GnomAD database, including 36 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in Lovd as Likely benign (no stars).

• Frequency:
  • Genomes: 𝑓 0.0021 (5 hom., cov: 33)
  • Exomes 𝑓: 0.0013 (31 hom.)
• Consequence: UGT1A4 NM_007120.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.0280

Genes affected

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]

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]

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]

UGT1A (HGNC:):

UGT1A1 (HGNC:12530): (UDP glucuronosyltransferase family 1 member A1) 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 preferred substrate of this enzyme is bilirubin, although it also has moderate activity with simple phenols, flavones, and C18 steroids. Mutations in this gene result in Crigler-Najjar syndromes types I and II and in Gilbert syndrome. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -13 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.82).
• BP6: Variant 2-233760224-G-C is Benign according to our data. Variant chr2-233760224-G-C is described in Lovd as [Likely_benign].
• BS1: Variant frequency is greater than expected in population eas. gnomad4 allele frequency = 0.00211 (290/137624) while in subpopulation EAS AF= 0.0459 (234/5094). AF 95% confidence interval is 0.0411. There are 5 homozygotes in gnomad4. There are 146 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 5 gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
UGT1A4	NM_007120.3	c.868-6810G>C		intron_variant		ENST00000373409.8	NP_009051.1
UGT1A5	NM_019078.2	c.868-6810G>C		intron_variant		ENST00000373414.4	NP_061951.1
UGT1A3	NM_019093.4	c.868-6810G>C		intron_variant		ENST00000482026.6	NP_061966.1
UGT1A6	NM_001072.4	c.862-6810G>C		intron_variant		ENST00000305139.11	NP_001063.2
UGT1A10	NM_019075.4	c.856-6810G>C		intron_variant		ENST00000344644.10	NP_061948.1
UGT1A8	NM_019076.5	c.856-6810G>C		intron_variant		ENST00000373450.5	NP_061949.3
UGT1A7	NM_019077.3	c.856-6810G>C		intron_variant		ENST00000373426.4	NP_061950.2
UGT1A9	NM_021027.3	c.856-6810G>C		intron_variant		ENST00000354728.5	NP_066307.1
UGT1A1	NM_000463.3	c.-64G>C		upstream_gene_variant		ENST00000305208.10	NP_000454.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
UGT1A4	ENST00000373409.8	c.868-6810G>C		intron_variant		1	NM_007120.3	ENSP00000362508.4
UGT1A5	ENST00000373414.4	c.868-6810G>C		intron_variant		1	NM_019078.2	ENSP00000362513.3
UGT1A3	ENST00000482026.6	c.868-6810G>C		intron_variant		1	NM_019093.4	ENSP00000418532.1
UGT1A6	ENST00000305139.11	c.862-6810G>C		intron_variant		1	NM_001072.4	ENSP00000303174.6
UGT1A10	ENST00000344644.10	c.856-6810G>C		intron_variant		1	NM_019075.4	ENSP00000343838.5
UGT1A9	ENST00000354728.5	c.856-6810G>C		intron_variant		1	NM_021027.3	ENSP00000346768.4
UGT1A7	ENST00000373426.4	c.856-6810G>C		intron_variant		1	NM_019077.3	ENSP00000362525.3
UGT1A8	ENST00000373450.5	c.856-6810G>C		intron_variant		1	NM_019076.5	ENSP00000362549.4
UGT1A1	ENST00000305208.10	c.-64G>C		upstream_gene_variant		1	NM_000463.3	ENSP00000304845.5

Frequencies

GnomAD3 genomes AF: 0.00213 AC: 293 AN: 137508 Hom.: 5 Cov.: 33

Gnomad AFR AF: 0.000352

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00206

Gnomad ASJ AF: 0.000928

Gnomad EAS AF: 0.0462

Gnomad SAS AF: 0.00166

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000310

Gnomad OTH AF: 0.00209

GnomAD4 exome AF: 0.00125 AC: 1811 AN: 1448684 Hom.: 31 Cov.: 31 AF XY: 0.00122 AC XY: 879 AN XY: 720424

Gnomad4 AFR exome AF: 0.0000303

Gnomad4 AMR exome AF: 0.00182

Gnomad4 ASJ exome AF: 0.000806

Gnomad4 EAS exome AF: 0.0358

Gnomad4 SAS exome AF: 0.00104

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000307

Gnomad4 OTH exome AF: 0.00282

GnomAD4 genome AF: 0.00211 AC: 290 AN: 137624 Hom.: 5 Cov.: 33 AF XY: 0.00218 AC XY: 146 AN XY: 66944

Gnomad4 AFR AF: 0.000351

Gnomad4 AMR AF: 0.00205

Gnomad4 ASJ AF: 0.000928

Gnomad4 EAS AF: 0.0459

Gnomad4 SAS AF: 0.00166

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000310

Gnomad4 OTH AF: 0.00155

Alfa AF: 0.000832 Hom.: 1

Bravo AF: 0.00245

Asia WGS AF: 0.0140 AC: 47 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.82
CADD	Benign	1.5
DANN	Benign	0.58

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

LitVar

Other links and lift over

dbSNP: rs873478; hg19: chr2-234668870; COSMIC: COSV59391269; COSMIC: COSV59391269;