1f9g
From Proteopedia
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| - | [[Image:1f9g.gif|left|200px]]<br /><applet load="1f9g" size="350" color="white" frame="true" align="right" spinBox="true" | ||
| - | caption="1f9g, resolution 2.00Å" /> | ||
| - | '''CRYSTAL STRUCTURE OF STREPTOCOCCUS PNEUMONIAE HYALURONATE LYASE COCRYSTALLIZED WITH ASCORBIC ACID'''<br /> | ||
| - | == | + | ==CRYSTAL STRUCTURE OF STREPTOCOCCUS PNEUMONIAE HYALURONATE LYASE COCRYSTALLIZED WITH ASCORBIC ACID== |
| + | <StructureSection load='1f9g' size='340' side='right'caption='[[1f9g]], [[Resolution|resolution]] 2.00Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[1f9g]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Streptococcus_pneumoniae Streptococcus pneumoniae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1F9G OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1F9G 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]] 2Å</td></tr> | ||
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ASC:ASCORBIC+ACID'>ASC</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=1f9g FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1f9g OCA], [https://pdbe.org/1f9g PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1f9g RCSB], [https://www.ebi.ac.uk/pdbsum/1f9g PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1f9g ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [https://www.uniprot.org/uniprot/HYSA_STRPN HYSA_STRPN] | ||
| + | == Evolutionary Conservation == | ||
| + | [[Image:Consurf_key_small.gif|200px|right]] | ||
| + | Check<jmol> | ||
| + | <jmolCheckbox> | ||
| + | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/f9/1f9g_consurf.spt"</scriptWhenChecked> | ||
| + | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | ||
| + | <text>to colour the structure by Evolutionary Conservation</text> | ||
| + | </jmolCheckbox> | ||
| + | </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=1f9g ConSurf]. | ||
| + | <div style="clear:both"></div> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
Enzyme activity measurement showed that L-ascorbic acid (vitamin C (Vc)) competitively inhibits the hyaluronan degradation by Streptococcus pneumoniae hyaluronate lyase. The complex crystal structure of this enzyme with Vc was determined at 2.0 A resolution. One Vc molecule was found to bind to the active site of the enzyme. The Vc carboxyl group provides the negative charges that lead the molecule into the highly positively charged cleft of the enzyme. The Vc ring system forms hydrophobic interactions with the side chain of Trp-292, which is one of the aromatic patch residues of this enzyme responsible for the selection of the cleavage sites on the substrate chain. The binding of Vc inhibits the substrate binding at hyaluronan 1, 2, and 3 (HA1, HA2, and HA3) catalytic positions. The high concentration of Vc in human tissues probably provides a low level of natural resistance to the pneumococcal invasion. This is the first time that Vc the direct inhibition on the bacterial "spreading factor" was reported, and Vc is also the first chemical that has been shown experimentally to have an inhibitory effect on bacterial hyaluronate lyase. These studies also highlight the possible structural requirement for the design of a stronger inhibitor of bacterial hyaluronate lyase. | Enzyme activity measurement showed that L-ascorbic acid (vitamin C (Vc)) competitively inhibits the hyaluronan degradation by Streptococcus pneumoniae hyaluronate lyase. The complex crystal structure of this enzyme with Vc was determined at 2.0 A resolution. One Vc molecule was found to bind to the active site of the enzyme. The Vc carboxyl group provides the negative charges that lead the molecule into the highly positively charged cleft of the enzyme. The Vc ring system forms hydrophobic interactions with the side chain of Trp-292, which is one of the aromatic patch residues of this enzyme responsible for the selection of the cleavage sites on the substrate chain. The binding of Vc inhibits the substrate binding at hyaluronan 1, 2, and 3 (HA1, HA2, and HA3) catalytic positions. The high concentration of Vc in human tissues probably provides a low level of natural resistance to the pneumococcal invasion. This is the first time that Vc the direct inhibition on the bacterial "spreading factor" was reported, and Vc is also the first chemical that has been shown experimentally to have an inhibitory effect on bacterial hyaluronate lyase. These studies also highlight the possible structural requirement for the design of a stronger inhibitor of bacterial hyaluronate lyase. | ||
| - | + | Vitamin C inhibits the enzymatic activity of Streptococcus pneumoniae hyaluronate lyase.,Li S, Taylor KB, Kelly SJ, Jedrzejas MJ J Biol Chem. 2001 May 4;276(18):15125-30. Epub 2001 Jan 12. PMID:11278838<ref>PMID:11278838</ref> | |
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| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | + | </div> | |
| - | + | <div class="pdbe-citations 1f9g" style="background-color:#fffaf0;"></div> | |
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| - | + | ==See Also== | |
| + | *[[Hyaluronidase 3D structures|Hyaluronidase 3D structures]] | ||
| + | == References == | ||
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
| + | [[Category: Large Structures]] | ||
| + | [[Category: Streptococcus pneumoniae]] | ||
| + | [[Category: Jedrzejas MJ]] | ||
| + | [[Category: Li S]] | ||
Current revision
CRYSTAL STRUCTURE OF STREPTOCOCCUS PNEUMONIAE HYALURONATE LYASE COCRYSTALLIZED WITH ASCORBIC ACID
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