1g3m
| |||||||
| , resolution 1.70Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , , | ||||||
| Gene: | STE (Homo sapiens) | ||||||
| Activity: | Estrone sulfotransferase, with EC number 2.8.2.4 | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CRYSTAL STRUCTURE OF HUMAN ESTROGEN SULFOTRANSFERASE IN COMPLEX WITH IN-ACTIVE COFACTOR PAP AND 3,5,3',5'-TETRACHLORO-BIPHENYL-4,4'-DIOL
OverviewOverview
Certain hydroxylated polychlorinated biphenyls (OH-PCBs) inhibit the human estrogen sulfotransferase (hEST) at subnanomolar concentrations, suggesting a possible pathway for PCB toxicity due to environmental exposure in humans. To address the structural basis of the inhibition, we have determined the crystal structure of hEST in the presence of the sulfuryl donor product 3 -phosphoadenosine 5 -phosphate and the OH-PCB 4,4 -OH 3,5,3,5 -tetraCB. The OH-PCB binds in the estrogen binding site with the position of the first phenolic ring in an orientation similar to the phenolic ring of 17 beta-estradiol. Interestingly, the OH-PCB does not bind in a planar conformation, but rather with a 30-degree twist between the phenyl rings. The crystal structure of hEST with the OH-PCB bound gives physical evidence that certain OH-PCBs can mimic binding of estrogenic compounds in biological systems.
About this StructureAbout this Structure
1G3M is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
ReferenceReference
Crystallographic analysis of a hydroxylated polychlorinated biphenyl (OH-PCB) bound to the catalytic estrogen binding site of human estrogen sulfotransferase., Shevtsov S, Petrotchenko EV, Pedersen LC, Negishi M, Environ Health Perspect. 2003 Jun;111(7):884-8. PMID:12782487
Page seeded by OCA on Sun Mar 30 20:35:55 2008