1sqi

<StructureSection load='1sqi' size='340' side='right' caption='[[1sqi]], [[Resolution|resolution]] 2.15&Aring;' scene=''>

<table><tr><td colspan='2'>[[1sqi]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Buffalo_rat Buffalo rat]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1SQI OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1SQI FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=869:(1-TERT-BUTYL-5-HYDROXY-1H-PYRAZOL-4-YL)[6-(METHYLSULFONYL)-4-METHOXY-2-METHYL-1,1-BIPHENYL-3-YL]METHANONE'>869</scene>, <scene name='pdbligand=FE:FE+(III)+ION'>FE</scene></td></tr>

<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1sqd|1sqd]]</td></tr>

<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1sqi FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1sqi OCA], [http://pdbe.org/1sqi PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1sqi RCSB], [http://www.ebi.ac.uk/pdbsum/1sqi PDBsum]</span></td></tr>

[[http://www.uniprot.org/uniprot/HPPD_RAT HPPD_RAT]] Key enzyme in the degradation of tyrosine.

<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/sq/1sqi_consurf.spt"</scriptWhenChecked>

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== Publication Abstract from PubMed ==

A high degree of selectivity toward the target site of the pest organism is a desirable attribute for new safer agrochemicals. To assist in the design of novel herbicides, we determined the crystal structures of the herbicidal target enzyme 4-hydroxyphenylpyruvate dioxygenase (HPPD; EC 1.13.11.27) from the plant Arabidopsis thaliana with and without an herbicidal benzoylpyrazole inhibitor that potently inhibits both plant and mammalian HPPDs. We also determined the structure of a mammalian (rat) HPPD in complex with the same nonselective inhibitor. From a screening campaign of over 1000 HPPD inhibitors, six highly plant-selective inhibitors were found. One of these had remarkable (&gt;1600-fold) selectivity toward the plant enzyme and was cocrystallized with Arabidopsis HPPD. Detailed comparisons of the plant and mammalian HPPD-ligand structures suggest a structural basis for the high degree of plant selectivity of certain HPPD inhibitors and point to design strategies to obtain potent and selective inhibitors of plant HPPD as agrochemical leads.

Structural basis for herbicidal inhibitor selectivity revealed by comparison of crystal structures of plant and mammalian 4-hydroxyphenylpyruvate dioxygenases.,Yang C, Pflugrath JW, Camper DL, Foster ML, Pernich DJ, Walsh TA Biochemistry. 2004 Aug 17;43(32):10414-23. PMID:15301540<ref>PMID:15301540</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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<div class="pdbe-citations 1sqi" style="background-color:#fffaf0;"></div>

*[[Dioxygenase|Dioxygenase]]

[[Category: Buffalo rat]]

[[Category: Camper, D L]]

[[Category: Foster, M L]]

[[Category: Pernich, D J]]

[[Category: Pflugrath, J W]]

[[Category: Walsh, T A]]

[[Category: Yang, C]]

[[Category: Rat 4-hydroxyphenylpyruvate dioxygenase]]