3std

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[[Image:3std.gif|left|200px]]
 
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==SCYTALONE DEHYDRATASE AND CYANOCINNOLINE INHIBITOR==
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The line below this paragraph, containing "STRUCTURE_3std", creates the "Structure Box" on the page.
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<StructureSection load='3std' size='340' side='right'caption='[[3std]], [[Resolution|resolution]] 1.65&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[3std]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Pyricularia_grisea Pyricularia grisea]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3STD OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3STD FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.65&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=MQ0:(3-AMINOMETHYL-CINNOLIN-4-YL)-(3,3-DIPHENYL-ALLYLIDENE)-AMINE'>MQ0</scene></td></tr>
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{{STRUCTURE_3std| PDB=3std | SCENE= }}
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3std FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3std OCA], [https://pdbe.org/3std PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3std RCSB], [https://www.ebi.ac.uk/pdbsum/3std PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3std ProSAT]</span></td></tr>
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</table>
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'''SCYTALONE DEHYDRATASE AND CYANOCINNOLINE INHIBITOR'''
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== Function ==
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[https://www.uniprot.org/uniprot/SCYD_MAGO7 SCYD_MAGO7] Catalyzes two steps in melanin biosynthesis. From scytalone they are two dehydration steps and one reduction step to yield melanin.
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== Evolutionary Conservation ==
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==Overview==
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[[Image:Consurf_key_small.gif|200px|right]]
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Scytalone dehydratase (SD) is a molecular target of inhibitor design efforts aimed at protecting rice plants from the fungal disease caused by Magnaporthe grisea. As determined from X-ray diffraction data of an SD-inhibitor complex [Lundqvist et al. (1994) Structure (London) 2, 937-944], there is an extended hydrogen-bonding network between protein side chains, the inhibitor, and two bound water molecules. From models of SD complexed to quinazoline and benztriazine inhibitors, a new class of potent SD inhibitors involving the displacement of an active-site water molecule were designed. We were able to increase inhibitory potency by synthesizing compounds with a nitrile functionality displayed into the space occupied by one of the crystallographic water molecules. Sixteen inhibitors are compared. The net conversion of potent quinazoline and benztriazine inhibitors to cyanoquinolines and cyanocinnolines increased binding potency 2-20-fold. Replacement of the nitrile with a hydrogen atom lowered binding affinity 100-30,000-fold. X-ray crystallographic data at 1.65 A resolution on a SD-inhibitor complex confirmed that the nitrile functionality displaced the water molecule as intended and that a favorable orientation was created with tyrosines 30 and 50 which had been part of the hydrogen-bonding network with the water molecule. Additional data on inhibitors presented herein reveals the importance of two hydrogen-bonding networks toward inhibitory potency: one between Asn131 and an appropriately positioned inhibitor heteroatom and one between a bound water molecule and a second inhibitor heteroatom.
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Check<jmol>
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<jmolCheckbox>
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==About this Structure==
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/st/3std_consurf.spt"</scriptWhenChecked>
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3STD is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Magnaporthe_grisea Magnaporthe grisea]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3STD OCA].
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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==Reference==
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</jmolCheckbox>
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Structure-based design of potent inhibitors of scytalone dehydratase: displacement of a water molecule from the active site., Chen JM, Xu SL, Wawrzak Z, Basarab GS, Jordan DB, Biochemistry. 1998 Dec 22;37(51):17735-44. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/9922139 9922139]
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</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=3std ConSurf].
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[[Category: Magnaporthe grisea]]
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<div style="clear:both"></div>
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[[Category: Scytalone dehydratase]]
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__TOC__
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[[Category: Single protein]]
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</StructureSection>
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[[Category: Basarab, G S.]]
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[[Category: Large Structures]]
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[[Category: Chen, J M.]]
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[[Category: Pyricularia grisea]]
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[[Category: Jordan, D B.]]
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[[Category: Basarab GS]]
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[[Category: Wawrzak, Z.]]
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[[Category: Chen JM]]
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[[Category: Xu, S L.]]
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[[Category: Jordan DB]]
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[[Category: Dehydratase]]
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[[Category: Wawrzak Z]]
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[[Category: Ec 4 2.1 94]]
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[[Category: Xu SL]]
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[[Category: Fungal melanin]]
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[[Category: Lyase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 22:13:31 2008''
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Current revision

SCYTALONE DEHYDRATASE AND CYANOCINNOLINE INHIBITOR

PDB ID 3std

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