View source for 3ett


==Crystal structure of a bacterial arylsulfate sulfotransferase catalytic intermediate with 4-nitrophenol bound in the active site==
<StructureSection load='3ett' size='340' side='right'caption='[[3ett]], [[Resolution|resolution]] 2.10&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3ett]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_CFT073 Escherichia coli CFT073]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3ETT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3ETT FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.1&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=HS8:3-(1-SULFO-1H-IMIDAZOL-3-IUM-4-YL)-L-ALANINE'>HS8</scene>, <scene name='pdbligand=NPO:P-NITROPHENOL'>NPO</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3ett FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3ett OCA], [https://pdbe.org/3ett PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3ett RCSB], [https://www.ebi.ac.uk/pdbsum/3ett PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3ett ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/ASST_ECOL6 ASST_ECOL6] Catalyzes the transfer of sulfuryl groups between phenolic compounds.[HAMAP-Rule:MF_00933]<ref>PMID:18565543</ref> <ref>PMID:19036922</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Sulfotransferases are a versatile class of enzymes involved in numerous physiological processes. In mammals, adenosine 3'-phosphate-5'-phosphosulfate (PAPS) is the universal sulfuryl donor, and PAPS-dependent sulfurylation of small molecules, including hormones, sugars, and antibiotics, is a critical step in hepatic detoxification and extracellular signaling. In contrast, little is known about sulfotransferases in bacteria, which make use of sulfurylated molecules as mediators of cell-cell interactions and host-pathogen interactions. Bacterial arylsulfate sulfotransferases (also termed aryl sulfotransferases), in contrast to PAPS-dependent sulfotransferases, transfer sulfuryl groups exclusively among phenolic compounds in a PAPS-independent manner. Here, we report the crystal structure of the virulence factor arylsulfate sulfotransferase (ASST) from the prototypic, pyelonephritogenic Escherichia coli strain CFT073 at 2.0-A resolution, and 2 catalytic intermediates, at 2.1-A and 2.4-A resolution, with substrates bound in the active site. ASST is one of the largest periplasmic enzymes and its 3D structure differs fundamentally from all other structurally characterized sulfotransferases. Each 63.8-kDa subunit of the ASST homodimer comprises a 6-bladed beta-propeller domain and a C-terminal beta-sandwich domain. The active sites of the dimer are situated at the center of the channel formed by each beta-propeller and are defined by the side chains of His-252, His-356, Arg-374, and His-436. We show that ASST follows a ping-pong bi-bi reaction mechanism, in which the catalytic residue His-436 undergoes transient sulfurylation, a previously unreported covalent protein modification. The data provide a framework for understanding PAPS-independent sulfotransfer and a basis for drug design targeting this bacterial virulence factor.

A structural and biochemical basis for PAPS-independent sulfuryl transfer by aryl sulfotransferase from uropathogenic Escherichia coli.,Malojcic G, Owen RL, Grimshaw JP, Brozzo MS, Dreher-Teo H, Glockshuber R Proc Natl Acad Sci U S A. 2008 Dec 9;105(49):19217-22. Epub 2008 Nov 26. PMID:19036922<ref>PMID:19036922</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3ett" style="background-color:#fffaf0;"></div>

==See Also==
*[[Sulfotransferase 3D structures|Sulfotransferase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Escherichia coli CFT073]]
[[Category: Large Structures]]
[[Category: Glockshuber R]]
[[Category: Grimshaw JP]]
[[Category: Malojcic G]]
[[Category: Owen RL]]