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Aliases UGT2B4, HLUG25, UDPGT2B4, UDPGTH1, UDPGTh-1, UGT2B11, UDP glucuronosyltransferase family 2 member B4
External IDs HomoloGene: 130717 GeneCards: UGT2B4
Gene location (Human)
Chromosome 4 (human)
Chr. Chromosome 4 (human)[1]
Chromosome 4 (human)
Genomic location for UGT2B4
Genomic location for UGT2B4
Band 4q13.3 Start 69,480,165 bp[1]
End 69,526,014 bp[1]
RNA expression pattern
PBB GE UGT2B4 206505 at fs.png
More reference expression data
Species Human Mouse
RefSeq (mRNA)



RefSeq (protein)



Location (UCSC) Chr 4: 69.48 – 69.53 Mb n/a
PubMed search [2] n/a
View/Edit Human

UDP glucuronosyltransferase 2 family, polypeptide B4, also known as UGT2B4, is an enzyme that in humans is encoded by the UGT2B4 gene.[3][4][5]


UGT2B4 is mainly involved in the glucuronidation of hyodeoxycholic acid, a bile acid, and catechol-estrogens, such as 17-epiestriol and 4-hydroxy-estrone.[6]

The expression of the UGT2B4 enzyme is upregulated by the farnesoid X receptor (FXR), a nuclear receptor which is activated by bile acids.[7] These same bile acids are substrates for the UGT2B4 enzyme. Hence upregulation of UGT2B4 by activated FXR provides a mechanism for the detection, conjugation and subsequent elimination of toxic bile acids.


  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000156096 - Ensembl, May 2017
  2. ^ "Human PubMed Reference:". 
  3. ^ "Entrez Gene: UGT2B4 UDP glucuronosyltransferase 2 family, polypeptide B4". 
  4. ^ Jackson MR, McCarthy LR, Harding D, Wilson S, Coughtrie MW, Burchell B (March 1987). "Cloning of a human liver microsomal UDP-glucuronosyltransferase cDNA". Biochem. J. 242 (2): 581–8. PMC 1147744Freely accessible. PMID 3109396. 
  5. ^ Monaghan G, Clarke DJ, Povey S, See CG, Boxer M, Burchell B (September 1994). "Isolation of a human YAC contig encompassing a cluster of UGT2 genes and its regional localization to chromosome 4q13". Genomics. 23 (2): 496–9. doi:10.1006/geno.1994.1531. PMID 7835904. 
  6. ^ Barre L, Fournel-Gigleux S, Finel M, Netter P, Magdalou J, Ouzzine M (March 2007). "Substrate specificity of the human UDP-glucuronosyltransferase UGT2B4 and UGT2B7. Identification of a critical aromatic amino acid residue at position 33". FEBS J. 274 (5): 1256–64. doi:10.1111/j.1742-4658.2007.05670.x. PMID 17263731. 
  7. ^ Barbier O, Torra IP, Sirvent A, Claudel T, Blanquart C, Duran-Sandoval D, Kuipers F, Kosykh V, Fruchart JC, Staels B (June 2003). "FXR induces the UGT2B4 enzyme in hepatocytes: a potential mechanism of negative feedback control of FXR activity". Gastroenterology. 124 (7): 1926–40. doi:10.1016/S0016-5085(03)00388-3. PMID 12806625. 

Further reading[edit]