UGT2B4

UDP glucuronosyltransferase 2 family, polypeptide B4
Identifiers
Symbols UGT2B4; HLUG25; UDPGT2B4; UDPGTH1; UGT2B11
External IDs OMIM600067 HomoloGene68144 GeneCards: UGT2B4 Gene
EC number 2.4.1.17
RNA expression pattern
More reference expression data
Orthologs
Species Human Mouse
Entrez 7363 71773
Ensembl ENSG00000156096 ENSMUSG00000035836
UniProt P06133 n/a
RefSeq (mRNA) NM_021139 NM_152811.1
RefSeq (protein) NP_066962 NP_690024.1
Location (UCSC) Chr 4:
70.35 – 70.39 Mb
Chr 5:
87.35 – 87.36 Mb
PubMed search [1] [2]

UDP glucuronosyltransferase 2 family, polypeptide B4, also known as UGT2B4, is an enzyme that in humans is encoded by the UGT2B4 gene.[1][2][3]

Function

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

The expression of the UGT2B4 enzyme is upregulated by the farnesoid X receptor (FXR), a nuclear receptor which is activated by bile acids.[5] 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.

References

  1. ^ "Entrez Gene: UGT2B4 UDP glucuronosyltransferase 2 family, polypeptide B4". http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=7363. 
  2. ^ 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 1147744. PMID 3109396. http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1147744. 
  3. ^ 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. 
  4. ^ 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. 
  5. ^ 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