Free for academic non-profit institutions. Other users need a Commercial license

Aliases for UGT1A1 Gene

Aliases for UGT1A1 Gene

  • UDP Glucuronosyltransferase Family 1 Member A1 2 3 5
  • UDP Glycosyltransferase 1 Family, Polypeptide A1 2 3
  • Bilirubin-Specific UDPGT Isozyme 1 3 4
  • UDP-Glucuronosyltransferase 1-A 3 4
  • UDP-Glucuronosyltransferase 1A1 3 4
  • UDPGT 1-1 3 4
  • HUG-BR1 3 4
  • UGT1-01 3 4
  • UGT-1A 3 4
  • UGT1*1 3 4
  • UGT1.1 3 4
  • UGT1A 3 4
  • GNT1 3 4
  • UGT1 3 4
  • UDP Glucuronosyltransferase 1 Family, Polypeptide A1 3
  • Bilirubin UDP-Glucuronosyltransferase Isozyme 1 3
  • Bilirubin UDP-Glucuronosyltransferase 1-1 3
  • Bilirubin UDP-Glucuronosyltranserase 3
  • UDP-Glucuronosyltransferase 1-1 3
  • EC 4
  • BILIQTL1 3
  • UDPGT 3

External Ids for UGT1A1 Gene

Previous HGNC Symbols for UGT1A1 Gene

  • UGT1
  • GNT1

Previous GeneCards Identifiers for UGT1A1 Gene

  • GC02U990253
  • GC02P234815
  • GC02P234878
  • GC02P234363
  • GC02P234450
  • GC02P234193
  • GC02P234203
  • GC02P234212
  • GC02P234223
  • GC02P234333
  • GC02P234668
  • GC02P226469
  • GC02P233619

Summaries for UGT1A1 Gene

Entrez Gene Summary for UGT1A1 Gene

  • 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]

CIViC summary for UGT1A1 Gene

GeneCards Summary for UGT1A1 Gene

UGT1A1 (UDP Glucuronosyltransferase Family 1 Member A1) is a Protein Coding gene. Diseases associated with UGT1A1 include Crigler-Najjar Syndrome, Type I and Crigler-Najjar Syndrome, Type Ii. Among its related pathways are Drug metabolism - cytochrome P450 and Cytochrome P450 - arranged by substrate type. Gene Ontology (GO) annotations related to this gene include protein homodimerization activity and enzyme binding. An important paralog of this gene is UGT1A3.

UniProtKB/Swiss-Prot for UGT1A1 Gene

  • UDPGT is of major importance in the conjugation and subsequent elimination of potentially toxic xenobiotics and endogenous compounds. This isoform glucuronidates bilirubin IX-alpha to form both the IX-alpha-C8 and IX-alpha-C12 monoconjugates and diconjugate. Is also able to catalyze the glucuronidation of 17beta-estradiol, 17alpha-ethinylestradiol, 1-hydroxypyrene, 4-methylumbelliferone, 1-naphthol, paranitrophenol, scopoletin, and umbelliferone. Isoform 2 lacks transferase activity but acts as a negative regulator of isoform 1.

Gene Wiki entry for UGT1A1 Gene

PharmGKB "VIP" Summary for UGT1A1 Gene

Additional gene information for UGT1A1 Gene

No data available for Tocris Summary , fRNAdb sequence ontologies and piRNA Summary for UGT1A1 Gene

Genomics for UGT1A1 Gene

GeneHancer (GH) Regulatory Elements for UGT1A1 Gene

Promoters and enhancers for UGT1A1 Gene
GeneHancer (GH) Identifier GH Type GH
GH Sources Gene Association Score Total Score TSS distance (kb) Number of Genes Away Size (kb) Transcription Factor
Binding Sites
Gene Targets
GH02J233745 Promoter/Enhancer 1.5 EPDnew ENCODE 650.4 -14.7 -14663 1 FOXA2 MLX ARID4B DMAP1 ETS1 YY1 TCF12 ATF7 NFKBIZ RXRA DNAJB3 LOC100286922 UGT1A2P UGT1A1 UGT1A6 UGT1A3 UGT1A4 UGT1A5 UGT1A7 UGT1A9
GH02J233759 Promoter/Enhancer 1.4 EPDnew FANTOM5 ENCODE 650.7 +0.7 654 2.5 FOXA2 TAF1 MAX RAD21 YY1 ZNF316 EGR1 HNF4G MAFK RXRA UGT1A1 UGT1A6 MROH2A UGT1A3 UGT1A4 UGT1A5 UGT1A7 UGT1A9 UGT1A10 UGT1A8
GH02J233688 Promoter/Enhancer 1.4 EPDnew ENCODE dbSUPER 650.2 -69.2 -69247 4.1 NFIB JUN YY1 GATA3 RCOR1 FOSL2 FOS NFE2L2 SMARCE1 RXRA UGT1A6 UGT1A1 USP40 UGT1A4 MROH2A UGT1A7 UGT1A9 UGT1A10 UGT1A8 UGT1A
GH02J233768 Promoter 0.5 EPDnew 650.4 +8.1 8147 0.1 UGT1A1 MROH2A UGT1A3 UGT1A4 UGT1A5 UGT1A6 UGT1A7 UGT1A9 UGT1A10 UGT1A8
GH02J233682 Promoter 0.5 EPDnew 650.2 -77.5 -77516 0.1 UGT1A7 UGT1A1 UGT1A6 UGT1A9 UGT1A10 UGT1A8 UGT1A
- Elite GeneHancer and/or Elite GeneHancer-gene association Download GeneHancer data from 2017 publication | Request up-to-date GeneHancer data (full dataset)

GeneHancers around UGT1A1 on UCSC Golden Path with GeneCards custom track

Top Transcription factor binding sites by QIAGEN in the UGT1A1 gene promoter:
  • p53
  • p300
  • Cdc5
  • Arnt
  • HOXA5
  • AML1a
  • HNF-4alpha1
  • NRSF form 1

Genomic Locations for UGT1A1 Gene

Genomic Locations for UGT1A1 Gene
13,052 bases
Plus strand
13,052 bases
Plus strand

Genomic View for UGT1A1 Gene

Genes around UGT1A1 on UCSC Golden Path with GeneCards custom track

Cytogenetic band:
UGT1A1 Gene in genomic location: bands according to Ensembl, locations according to GeneLoc (and/or Entrez Gene and/or Ensembl if different)
Genomic Location for UGT1A1 Gene
GeneLoc Logo Genomic Neighborhood Exon StructureGene Density

RefSeq DNA sequence for UGT1A1 Gene

Proteins for UGT1A1 Gene

  • Protein details for UGT1A1 Gene (UniProtKB/Swiss-Prot)

    Protein Symbol:
    Recommended name:
    UDP-glucuronosyltransferase 1-1
    Protein Accession:
    Secondary Accessions:
    • A6NJC3
    • B8K286

    Protein attributes for UGT1A1 Gene

    533 amino acids
    Molecular mass:
    59591 Da
    Quaternary structure:
    • Isoform 1 interacts with isoform 2/i2 suggesting that oligomerization is involved in negative regulation of transferase activity by isoform 2. Isoform 1 also interacts with respective i2 isoforms of UGT1A3, UGT1A4, UGT1A6, UGT1A7, UGT1A8, UGT1A9 and UGT1A10. Part of a large chaperone multiprotein complex comprising DNAJB11, HSP90B1, HSPA5, HYOU, PDIA2, PDIA4, PDIA6, PPIB, SDF2L1, UGT1A1 and very small amounts of ERP29, but not, or at very low levels, CALR nor CANX.
    • The gene is part of the UGT1A complex locus which displays alternative use of promoters, first exons and terminal exons. The locus is defined by 13 first exons, which are alternatively spliced to 3 other common exons and 2 alternative terminal exons 5. From the 27 possible mRNA isoforms, 9 produce functionally active polypeptides (UGT1A1, 1A3, 1A4, 1A5, 1A6, 1A7, 1A8, 1A9 and 1A10) called isoforms 1 (i1). Use of an alternative exon 5 (5b) as terminal exon is leading to 9 additional alternatively spliced products termed isoforms i2 and which lack transferase activity.
    • Sequence=AAA61247.1; Type=Erroneous gene model prediction; Evidence={ECO:0000305}; Sequence=AAF03522.2; Type=Erroneous gene model prediction; Evidence={ECO:0000305};

    Alternative splice isoforms for UGT1A1 Gene


neXtProt entry for UGT1A1 Gene

Post-translational modifications for UGT1A1 Gene

  • Glycosylation at posLast=347347, posLast=295295, and isoforms=2102
  • Modification sites at PhosphoSitePlus

Other Protein References for UGT1A1 Gene

ENSEMBL proteins:
REFSEQ proteins:

No data available for DME Specific Peptides for UGT1A1 Gene

Domains & Families for UGT1A1 Gene

Gene Families for UGT1A1 Gene

Human Protein Atlas (HPA):
  • Cancer-related genes
  • Disease related genes
  • Enzymes
  • Plasma proteins
  • Potential drug targets
  • Predicted membrane proteins

Protein Domains for UGT1A1 Gene

Graphical View of Domain Structure for InterPro Entry



  • Belongs to the UDP-glycosyltransferase family.
  • Belongs to the UDP-glycosyltransferase family.
genes like me logo Genes that share domains with UGT1A1: view

Function for UGT1A1 Gene

Molecular function for UGT1A1 Gene

UniProtKB/Swiss-Prot Function:
UDPGT is of major importance in the conjugation and subsequent elimination of potentially toxic xenobiotics and endogenous compounds. This isoform glucuronidates bilirubin IX-alpha to form both the IX-alpha-C8 and IX-alpha-C12 monoconjugates and diconjugate. Is also able to catalyze the glucuronidation of 17beta-estradiol, 17alpha-ethinylestradiol, 1-hydroxypyrene, 4-methylumbelliferone, 1-naphthol, paranitrophenol, scopoletin, and umbelliferone. Isoform 2 lacks transferase activity but acts as a negative regulator of isoform 1.
UniProtKB/Swiss-Prot CatalyticActivity:
UDP-glucuronate + acceptor = UDP + acceptor beta-D-glucuronoside.
UniProtKB/Swiss-Prot BiophysicochemicalProperties:
Kinetic parameters: KM=0.26 uM for bilirubin {ECO:0000269 PubMed:18004206}; Vmax=1080 pmol/min/mg enzyme with bilirubin as substrate {ECO:0000269 PubMed:18004206};

Enzyme Numbers (IUBMB) for UGT1A1 Gene

Phenotypes From GWAS Catalog for UGT1A1 Gene

Gene Ontology (GO) - Molecular Function for UGT1A1 Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0001972 retinoic acid binding IDA 20308471
GO:0004857 enzyme inhibitor activity IDA 19996319
GO:0005496 steroid binding IDA 19996319
GO:0008194 UDP-glycosyltransferase activity IBA --
GO:0015020 glucuronosyltransferase activity TAS --
genes like me logo Genes that share ontologies with UGT1A1: view
genes like me logo Genes that share phenotypes with UGT1A1: view

Human Phenotype Ontology for UGT1A1 Gene

HPO Id HPO Name Alternative Ids Definition Synonyms

Animal Model Products

Clone Products

No data available for Animal Models , miRNA , Transcription Factor Targets and HOMER Transcription for UGT1A1 Gene

Localization for UGT1A1 Gene

Subcellular locations from UniProtKB/Swiss-Prot for UGT1A1 Gene

Isoform 1: Microsome. Endoplasmic reticulum membrane; Single-pass membrane protein.
Isoform 2: Microsome. Endoplasmic reticulum.

Subcellular locations from

Extracellular space Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi Apparatus Nucleus Mitochondrion 0 1 2 3 4 5 Confidence
COMPARTMENTS Subcellular localization image for UGT1A1 gene
Compartment Confidence
endoplasmic reticulum 5
plasma membrane 3
peroxisome 2
nucleus 2
cytosol 2
extracellular 1
mitochondrion 1

Gene Ontology (GO) - Cellular Components for UGT1A1 Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0005783 endoplasmic reticulum IDA,IEA 17179145
GO:0005789 endoplasmic reticulum membrane TAS --
GO:0005887 integral component of plasma membrane IEA --
GO:0016020 membrane IEA --
GO:0016021 integral component of membrane IEA --
genes like me logo Genes that share ontologies with UGT1A1: view

No data available for Subcellular locations from the Human Protein Atlas (HPA) for UGT1A1 Gene

Pathways & Interactions for UGT1A1 Gene

genes like me logo Genes that share pathways with UGT1A1: view

Gene Ontology (GO) - Biological Process for UGT1A1 Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0001889 liver development IEA --
GO:0006789 bilirubin conjugation TAS --
GO:0006953 acute-phase response IEA --
GO:0007584 response to nutrient IEA --
GO:0008152 metabolic process IEA --
genes like me logo Genes that share ontologies with UGT1A1: view

No data available for SIGNOR curated interactions for UGT1A1 Gene

Drugs & Compounds for UGT1A1 Gene

(244) Drugs for UGT1A1 Gene - From: DrugBank, PharmGKB, ClinicalTrials, FDA Approved Drugs, HMDB, and Novoseek

Name Status Disease Links Group Role Mechanism of Action Clinical Trials
Irinotecan Approved, Investigational Pharma Enzyme, substrate Topoisomerase I inhibitor, TOPO I inhibitor, Topoisomerase 1 Inhibitors 1181
Dolutegravir Approved Pharma Enzyme, substrate 163
Indacaterol Approved Pharma Enzyme, substrate β2-agonist 0
Nilotinib Approved, Investigational Pharma Transporter, inhibitor Kinase Inhibitors 0
Estradiol Approved, Investigational, Vet_approved Pharma Enzyme, substrate Sex hormone 1400

(2319) Additional Compounds for UGT1A1 Gene - From: HMDB and Novoseek

Name Synonyms Role CAS Number PubChem IDs PubMed IDs
  • 4-Methyl-7-hydroxycoumarin
  • 4-MU
  • 7-Hydroxy-4-methyl-2-oxo-2H-1-benzopyran
  • 7-Hydroxy-4-methyl-2-oxo-3-chromene
  • 7-Hydroxy-4-methyl-2H-1-benzopyran-2-one
  • Morphine 3-glucuronide(minor)
  • Morphine-3beta-D-glucuronide
  • 6-Methoxy-7-hydroxycoumarin
  • 6-Methylesculetin
  • 6-O-Methylesculetin
  • 7-Hydroxy-6-methoxy-2H-1-benzopyran-2-one
  • 7-Hydroxy-6-methoxycoumarin
SN38 glucuronide
  • sn-38g
  • 7-Ethyl-10-hydroxycamptothecin beta-glucuronide
  • sn 38g
  • 7-Ethyl-10-hydroxycamptothecin glucuronide
  • 12a-Hydroxypachyrrhizone
genes like me logo Genes that share compounds with UGT1A1: view

Transcripts for UGT1A1 Gene

mRNA/cDNA for UGT1A1 Gene

(1) REFSEQ mRNAs :
(58) Additional mRNA sequences :
(271) Selected AceView cDNA sequences:
(2) Ensembl transcripts including schematic representations, and UCSC links where relevant :

Unigene Clusters for UGT1A1 Gene

UDP glucuronosyltransferase 1 family, polypeptide A1:
Representative Sequences:

Clone Products

Alternative Splicing Database (ASD) splice patterns (SP) for UGT1A1 Gene

No ASD Table

Relevant External Links for UGT1A1 Gene

GeneLoc Exon Structure for
ECgene alternative splicing isoforms for

Expression for UGT1A1 Gene

mRNA expression in normal human tissues from GTEx, Illumina, BioGPS, and CGAP SAGE for UGT1A1 Gene

mRNA expression in embryonic tissues and stem cells from LifeMap Discovery

mRNA differential expression in normal tissues according to GTEx for UGT1A1 Gene

This gene is overexpressed in Colon - Transverse (x22.9), Bladder (x17.0), and Small Intestine - Terminal Ileum (x5.8).

Protein differential expression in normal tissues from HIPED for UGT1A1 Gene

This gene is overexpressed in Liver (43.0) and Gallbladder (26.0).

Integrated Proteomics: protein expression in normal tissues and cell lines from ProteomicsDB and MOPED for UGT1A1 Gene

Protein tissue co-expression partners for UGT1A1 Gene

NURSA nuclear receptor signaling pathways regulating expression of UGT1A1 Gene:


SOURCE GeneReport for Unigene cluster for UGT1A1 Gene:


mRNA Expression by UniProt/SwissProt for UGT1A1 Gene:

Tissue specificity: Isoform 1 and isoform 2 are expressed in liver, colon and small intestine. Isoform 2 but not isoform 1 is expressed in kidney. Isoform 1 and isoform 2 are not expressed in esophagus. Not expressed in skin.

Evidence on tissue expression from TISSUES for UGT1A1 Gene

  • Liver(4.6)
  • Blood(4.4)
  • Intestine(2.3)

Phenotype-based relationships between genes and organs from Gene ORGANizer for UGT1A1 Gene

Germ Layers:
  • ectoderm
  • endoderm
  • mesoderm
  • digestive
  • integumentary
  • nervous
  • skeletal muscle
Head and neck:
  • brain
  • ear
  • eye
  • head
  • mouth
  • liver
  • skin
genes like me logo Genes that share expression patterns with UGT1A1: view

Orthologs for UGT1A1 Gene

This gene was present in the common ancestor of animals.

Orthologs for UGT1A1 Gene

Organism Taxonomy Gene Similarity Type Details
(Bos Taurus)
Mammalia UGT1A1 33
  • 83.49 (n)
-- 34
  • 70 (a)
-- 34
  • 66 (a)
-- 34
  • 66 (a)
(Rattus norvegicus)
Mammalia Ugt1a1 33
  • 82.68 (n)
(Mus musculus)
Mammalia Ugt1a1 16 33
  • 81.64 (n)
Ugt1a5 34
  • 76 (a)
Ugt1a2 34
  • 76 (a)
(Pan troglodytes)
Mammalia -- 34
  • 32 (a)
(Gallus gallus)
Aves UGT1A1 33
  • 66.27 (n)
(Anolis carolinensis)
Reptilia -- 34
  • 60 (a)
(Danio rerio)
Actinopterygii ugt1a1 33
  • 58.3 (n)
ugt1a7 34
  • 51 (a)
ugt1b1 34
  • 48 (a)
ugt1b5 34
  • 46 (a)
ugt1b3 34
  • 46 (a)
ugt1b2 34
  • 46 (a)
ugt1b4 34
  • 46 (a)
fruit fly
(Drosophila melanogaster)
Insecta CG10178 35 33
  • 47.54 (n)
Ugt36Bb 35
  • 39 (a)
CG11289 35
  • 34 (a)
Ugt37c1 35
  • 30 (a)
Ugt86Dj 35
  • 29 (a)
BEST:GH06505 35
  • 28 (a)
Ugt86Dh 35
  • 27 (a)
Ugt36Ba 35
  • 27 (a)
Dot 35
  • 25 (a)
Ugt37b1 35
  • 25 (a)
CG5724 35
  • 24 (a)
CG3797 35
  • 24 (a)
African malaria mosquito
(Anopheles gambiae)
Insecta AgaP_AGAP008401 33
  • 47.33 (n)
(Caenorhabditis elegans)
Secernentea C08F11.8 35
  • 28 (a)
C10H11.5 35
  • 28 (a)
C17G1.3 35
  • 28 (a)
ZC443.5 35
  • 27 (a)
F09G2.6 35
  • 26 (a)
C10H11.6 35
  • 26 (a)
R04B5.9 35
  • 25 (a)
R11A8.3 35
  • 25 (a)
AC3.2 35
  • 25 (a)
C03A7.11 35
  • 25 (a)
K08B4.4 35
  • 24 (a)
T01G5.2 35
  • 24 (a)
ZC455.3 35
  • 23 (a)
C10H11.4 35
  • 23 (a)
F01D4.1 35
  • 22 (a)
AC3.8 35
  • 22 (a)
F01D4.2 35
  • 21 (a)
Species where no ortholog for UGT1A1 was found in the sources mined by GeneCards:
  • A. gosspyii yeast (Ashbya gossypii)
  • Actinobacteria (Mycobacterium tuberculosis)
  • African clawed frog (Xenopus laevis)
  • Alicante grape (Vitis vinifera)
  • alpha proteobacteria (Wolbachia pipientis)
  • amoeba (Dictyostelium discoideum)
  • Archea (Pyrococcus horikoshii)
  • baker's yeast (Saccharomyces cerevisiae)
  • barley (Hordeum vulgare)
  • beta proteobacteria (Neisseria meningitidis)
  • bread mold (Neurospora crassa)
  • Chromalveolata (Phytophthora infestans)
  • common water flea (Daphnia pulex)
  • corn (Zea mays)
  • dog (Canis familiaris)
  • E. coli (Escherichia coli)
  • filamentous fungi (Aspergillus nidulans)
  • Firmicute bacteria (Streptococcus pneumoniae)
  • fission yeast (Schizosaccharomyces pombe)
  • green algae (Chlamydomonas reinhardtii)
  • honey bee (Apis mellifera)
  • K. lactis yeast (Kluyveromyces lactis)
  • loblloly pine (Pinus taeda)
  • malaria parasite (Plasmodium falciparum)
  • medicago trunc (Medicago Truncatula)
  • moss (Physcomitrella patens)
  • oppossum (Monodelphis domestica)
  • orangutan (Pongo pygmaeus)
  • pig (Sus scrofa)
  • platypus (Ornithorhynchus anatinus)
  • rainbow trout (Oncorhynchus mykiss)
  • rice (Oryza sativa)
  • rice blast fungus (Magnaporthe grisea)
  • schistosome parasite (Schistosoma mansoni)
  • sea anemone (Nematostella vectensis)
  • sea squirt (Ciona intestinalis)
  • sea squirt (Ciona savignyi)
  • sea urchin (Strongylocentrotus purpuratus)
  • sorghum (Sorghum bicolor)
  • soybean (Glycine max)
  • stem rust fungus (Puccinia graminis)
  • sugarcane (Saccharum officinarum)
  • thale cress (Arabidopsis thaliana)
  • tomato (Lycopersicon esculentum)
  • toxoplasmosis (Toxoplasma gondii)
  • Trichoplax (Trichoplax adhaerens)
  • tropical clawed frog (Silurana tropicalis)
  • wheat (Triticum aestivum)

Evolution for UGT1A1 Gene

Gene Tree for UGT1A1 (if available)
Gene Tree for UGT1A1 (if available)
Evolutionary constrained regions (ECRs) for UGT1A1: view image

Paralogs for UGT1A1 Gene

(31) SIMAP similar genes for UGT1A1 Gene using alignment to 6 proteins:

  • UD11_HUMAN
  • Q5DT03_HUMAN
  • Q9BX76_HUMAN
  • Q9H3F9_HUMAN
genes like me logo Genes that share paralogs with UGT1A1: view

Variants for UGT1A1 Gene

Polymorphic Variants from UniProtKB/Swiss-Prot for UGT1A1 Gene

Genetic variation in UGT1A1 defines the bilirubin serum levels quantitative trait locus 1 (BILIQTL1) [MIM:601816]. Variation in serum bilirubin is associated with altered cardiovascular disease risk and drug metabolism.

Sequence variations from dbSNP and Humsavar for UGT1A1 Gene

SNP ID Clin Chr 02 pos Variation AA Info Type
rs1042640 benign, Crigler-Najjar syndrome, Lucey-Driscoll syndrome, Gilbert's syndrome 233,772,898(+) G/C/T 3_prime_UTR_variant
rs10929303 benign, Gilbert's syndrome, Crigler-Najjar syndrome, Lucey-Driscoll syndrome 233,772,770(+) T/C 3_prime_UTR_variant
rs111033539 pathogenic, Crigler Najjar syndrome, type 1 233,767,160(+) C/T coding_sequence_variant, stop_gained
rs111033541 pathogenic, Crigler-Najjar syndrome, type II, Crigler-Najjar syndrome 2 (CN2) [MIM:606785] 233,760,331(+) T/G coding_sequence_variant, missense_variant
rs138183896 uncertain-significance, Lucey-Driscoll syndrome, Gilbert's syndrome, Crigler-Najjar syndrome 233,760,581(+) T/C coding_sequence_variant, synonymous_variant

Structural Variations from Database of Genomic Variants (DGV) for UGT1A1 Gene

Variant ID Type Subtype PubMed ID
nsv1013712 CNV loss 25217958
nsv3215 CNV deletion 18451855

Variation tolerance for UGT1A1 Gene

Residual Variation Intolerance Score: 24.3% of all genes are more intolerant (likely to be disease-causing)
Gene Damage Index Score: 2.96; 49.42% of all genes are more intolerant (likely to be disease-causing)

Additional Variant Information for UGT1A1 Gene

Human Gene Mutation Database (HGMD)
SNPedia medical, phenotypic, and genealogical associations of SNPs for

Disorders for UGT1A1 Gene

MalaCards: The human disease database

(35) MalaCards diseases for UGT1A1 Gene - From: HGMD, OMIM, ClinVar, GTR, Orphanet, Swiss-Prot, DISEASES, Novoseek, and GeneCards

Disorder Aliases PubMed IDs
crigler-najjar syndrome, type i
  • hyperbilirubinemia, crigler-najjar type i; hblrcn1
crigler-najjar syndrome, type ii
  • hyperbilirubinemia, crigler-najjar type ii; hblrcn2
hyperbilirubinemia, transient familial neonatal
  • hblrtfn
gilbert syndrome
  • hyperbilirubinemia, gilbert type; hblrg
bilirubin, serum level of, quantitative trait locus 1
  • biliqtl1
- elite association - COSMIC cancer census association via MalaCards


  • Gilbert syndrome (GILBS) [MIM:143500]: Occurs as a consequence of reduced bilirubin transferase activity and is often detected in young adults with vague non-specific complaints. {ECO:0000269 PubMed:11013440, ECO:0000269 PubMed:12139570, ECO:0000269 PubMed:7715297, ECO:0000269 PubMed:9627603}. Note=The disease is caused by mutations affecting the gene represented in this entry.
  • Transient familial neonatal hyperbilirubinemia (HBLRTFN) [MIM:237900]: A condition characterized by excessive concentration of bilirubin in the blood, which may lead to jaundice. Breast milk jaundice is a common problem in nursing infants. {ECO:0000269 PubMed:11061796}. Note=The disease may be caused by mutations affecting the gene represented in this entry. The defect has been ascribed to various breast milk substances, but the component or combination of components that is responsible remains unclear. Defects of UGT1A1 are an underlying cause of the prolonged unconjugated hyperbilirubinemia associated with breast milk. One or more components in the milk may trigger the jaundice in infants who have such mutations. Mutations are identical to those detected in patients with Gilbert syndrome, a risk factor of neonatal non-physiologic hyperbilirubinemia and a genetic factor in fasting hyperbilirubinemia.
  • Crigler-Najjar syndrome 1 (CN1) [MIM:218800]: Patients have severe hyperbilirubinemia and usually die of kernicterus (bilirubin accumulation in the basal ganglia and brainstem nuclei) within the first year of life. CN1 inheritance is autosomal recessive. {ECO:0000269 PubMed:11013440, ECO:0000269 PubMed:15712364, ECO:0000269 PubMed:1634050, ECO:0000269 PubMed:17229650, ECO:0000269 PubMed:19830808, ECO:0000269 PubMed:23992562, ECO:0000269 PubMed:7906695, ECO:0000269 PubMed:7989045, ECO:0000269 PubMed:7989595, ECO:0000269 PubMed:8226884}. Note=The disease is caused by mutations affecting the gene represented in this entry.
  • Crigler-Najjar syndrome 2 (CN2) [MIM:606785]: Patients have less severe hyperbilirubinemia and usually survive into adulthood without neurologic damage. Phenobarbital, which induces the partially deficient glucuronyl transferase, can diminish the jaundice. CN2 inheritance is autosomal dominant. {ECO:0000269 PubMed:11013440, ECO:0000269 PubMed:11370628, ECO:0000269 PubMed:12402338, ECO:0000269 PubMed:14550264, ECO:0000269 PubMed:15712364, ECO:0000269 PubMed:17229650, ECO:0000269 PubMed:18004206, ECO:0000269 PubMed:19830808, ECO:0000269 PubMed:23099197, ECO:0000269 PubMed:23992562, ECO:0000269 PubMed:7989595, ECO:0000269 PubMed:8276413, ECO:0000269 PubMed:8280139, ECO:0000269 PubMed:8706880, ECO:0000269 PubMed:9621515, ECO:0000269 PubMed:9639672}. Note=The disease is caused by mutations affecting the gene represented in this entry.

Additional Disease Information for UGT1A1

Genetic Association Database
Human Genome Epidemiology Navigator
ATLAS of Genetics and Cytogenetics in Oncology and Haematology
genes like me logo Genes that share disorders with UGT1A1: view

No data available for Genatlas for UGT1A1 Gene

Publications for UGT1A1 Gene

  1. Crigler-Najjar syndrome in The Netherlands: identification of four novel UGT1A1 alleles, genotype-phenotype correlation, and functional analysis of 10 missense mutants. (PMID: 19830808) Sneitz N … Bosma PJ (Human mutation 2010) 3 4 22 58
  2. Genetic polymorphisms in the UDP-glucuronosyltransferase 1A1 (UGT1A1) gene and prostate cancer risk in Caucasian men. (PMID: 20308029) Karatzas A … Tsezou A (Cancer epidemiology 2010) 3 22 44 58
  3. A causal relationship between UDP-glucuronosyltransferase 1A1 promoter polymorphism and idiopathic hyperbilirubinemia in Turkish newborns. (PMID: 20402064) Ergin H … Atalay OE (The Turkish journal of pediatrics 2010) 3 22 44 58
  4. Close association of UGT1A9 IVS1+399C>T with UGT1A1*28, *6, or *60 haplotype and its apparent influence on 7-ethyl-10-hydroxycamptothecin (SN-38) glucuronidation in Japanese. (PMID: 18981166) Saito Y … Sawada J (Drug metabolism and disposition: the biological fate of chemicals 2009) 3 22 44 58
  5. Association study between single-nucleotide polymorphisms in 199 drug-related genes and commonly measured quantitative traits of 752 healthy Japanese subjects. (PMID: 19343046) Saito A … Kamatani N (Journal of human genetics 2009) 3 22 44 58

Products for UGT1A1 Gene

Sources for UGT1A1 Gene

Loading form....