Crystal structure of human catecholamine sulfotransferase

Lisa M. Bidwell, Michael E. McManus, Andrea Gaedigk, Yoshimitsu Kakuta, Masa Negishi, Lars Pedersen, Jennifer L. Martin

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Abstract

Sulfonation, like phosphorylation, can modify the activity of a variety of biological molecules. The sulfotransferase enzymes sulfonate neurotransmitters, drugs, steroid hormones, dietary carcinogens and proteins. SULT1A3 specifically sulfonates catecholamines such as dopamine, adrenaline and noradrenaline. The crystal structure of SULT1A3 with a sulfate bound at the active site, has been determined at 2.4 Å resolution. Although the core α/β fold is like that of estrogen and heparan sulfotransferases, major differences occur in and around the active site. Most notably, several regions surrounding the active site, including a section of 40 residues, are disordered in SULT1A3. Regions that are topologically equivalent to the disordered parts of SULT1A3 are involved in substrate and cofactor binding in estrogen and heparan sulfotransferase. Flexibility in these regions suggests that ligand binding elicits a disorder-order transition in and around the active site of sulfotransferases and might contribute to the broad substrate specificity of these enzymes.

Original languageEnglish
Pages (from-to)521-530
Number of pages10
JournalJournal of Molecular Biology
Volume293
Issue number3
DOIs
Publication statusPublished - Oct 29 1999

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All Science Journal Classification (ASJC) codes

  • Structural Biology
  • Molecular Biology

Cite this

Bidwell, L. M., McManus, M. E., Gaedigk, A., Kakuta, Y., Negishi, M., Pedersen, L., & Martin, J. L. (1999). Crystal structure of human catecholamine sulfotransferase. Journal of Molecular Biology, 293(3), 521-530. https://doi.org/10.1006/jmbi.1999.3153