1gwd

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[[Image:1gwd.jpg|left|200px]]
 
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{{Structure
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==Tri-iodide derivative of hen egg-white lysozyme==
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|PDB= 1gwd |SIZE=350|CAPTION= <scene name='initialview01'>1gwd</scene>, resolution 1.77&Aring;
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<StructureSection load='1gwd' size='340' side='right'caption='[[1gwd]], [[Resolution|resolution]] 1.77&Aring;' scene=''>
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|SITE= <scene name='pdbsite=EA1:Egl+Binding+Site+For+Chain+A'>EA1</scene>
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== Structural highlights ==
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|LIGAND= <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=CMO:CARBON+MONOXIDE'>CMO</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=IOD:IODIDE+ION'>IOD</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>
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<table><tr><td colspan='2'>[[1gwd]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Gallus_gallus Gallus gallus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1GWD OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1GWD FirstGlance]. <br>
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|ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Lysozyme Lysozyme], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.17 3.2.1.17] </span>
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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]] 1.77&#8491;</td></tr>
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|GENE=
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=CMO:CARBON+MONOXIDE'>CMO</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=IOD:IODIDE+ION'>IOD</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene></td></tr>
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|DOMAIN=
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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=1gwd FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1gwd OCA], [https://pdbe.org/1gwd PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1gwd RCSB], [https://www.ebi.ac.uk/pdbsum/1gwd PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1gwd ProSAT]</span></td></tr>
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|RELATEDENTRY=
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</table>
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1gwd FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1gwd OCA], [http://www.ebi.ac.uk/pdbsum/1gwd PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1gwd RCSB]</span>
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== Evolutionary Conservation ==
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}}
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/gw/1gwd_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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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=1gwd ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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A series of experiments performed at Cu Kalpha wavelength on in-house X-ray equipment are presented which investigate two possibilities for enhancing the experimental phasing signal by means of (i) triiodide/iodide soaks using KI/I(2) and (ii) combinations of counter-ions introduced using the short cryosoak method. Triiodide-derivative crystal structures for five test proteins have been refined and reveal that iodine can bind as polyiodide and single iodide ions through hydrophobic and hydrogen-bonding interactions both at the molecular surface and in intramolecular and intermolecular cavities. In three cases, the structures could be automatically determined with autoSHARP using in-house SAD and SIRAS data. The investigation of combinatorial counter-ion replacement using multiple salts with Na(+) and Cs(+) as cations and I(-) and Cl(-) as anions reveals that, for the case of hen egg-white lysozyme, significant improvement in phasing signal is obtained by the combined use of salts compared with SIRAS methods using native and single short-soak derivative data sets.
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'''TRI-IODIDE DERIVATIVE OF HEN EGG-WHITE LYSOZYME'''
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Triiodide derivatization and combinatorial counter-ion replacement: two methods for enhancing phasing signal using laboratory Cu Kalpha X-ray equipment.,Evans G, Bricogne G Acta Crystallogr D Biol Crystallogr. 2002 Jun;58(Pt 6 Pt 2):976-91. Epub, 2002 May 29. PMID:12037300<ref>PMID:12037300</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 1gwd" style="background-color:#fffaf0;"></div>
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==Overview==
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==See Also==
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A series of experiments performed at Cu Kalpha wavelength on in-house X-ray equipment are presented which investigate two possibilities for enhancing the experimental phasing signal by means of (i) triiodide/iodide soaks using KI/I(2) and (ii) combinations of counter-ions introduced using the short cryosoak method. Triiodide-derivative crystal structures for five test proteins have been refined and reveal that iodine can bind as polyiodide and single iodide ions through hydrophobic and hydrogen-bonding interactions both at the molecular surface and in intramolecular and intermolecular cavities. In three cases, the structures could be automatically determined with autoSHARP using in-house SAD and SIRAS data. The investigation of combinatorial counter-ion replacement using multiple salts with Na(+) and Cs(+) as cations and I(-) and Cl(-) as anions reveals that, for the case of hen egg-white lysozyme, significant improvement in phasing signal is obtained by the combined use of salts compared with SIRAS methods using native and single short-soak derivative data sets.
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*[[Lysozyme 3D structures|Lysozyme 3D structures]]
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== References ==
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==About this Structure==
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<references/>
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1GWD is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Gallus_gallus Gallus gallus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1GWD OCA].
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__TOC__
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</StructureSection>
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==Reference==
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Triiodide derivatization and combinatorial counter-ion replacement: two methods for enhancing phasing signal using laboratory Cu Kalpha X-ray equipment., Evans G, Bricogne G, Acta Crystallogr D Biol Crystallogr. 2002 Jun;58(Pt 6 Pt 2):976-91. Epub, 2002 May 29. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/12037300 12037300]
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[[Category: Gallus gallus]]
[[Category: Gallus gallus]]
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[[Category: Lysozyme]]
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[[Category: Large Structures]]
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[[Category: Single protein]]
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[[Category: Bricogne G]]
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[[Category: Bricogne, G.]]
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[[Category: Evans G]]
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[[Category: Evans, G.]]
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[[Category: aller]]
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[[Category: bacteriolytic enzyme]]
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[[Category: glycosidase]]
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[[Category: hydrolase]]
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[[Category: signal]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 20:52:40 2008''
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Current revision

Tri-iodide derivative of hen egg-white lysozyme

PDB ID 1gwd

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