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| | <StructureSection load='4e3v' size='340' side='right'caption='[[4e3v]], [[Resolution|resolution]] 1.50Å' scene=''> | | <StructureSection load='4e3v' size='340' side='right'caption='[[4e3v]], [[Resolution|resolution]] 1.50Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4e3v]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Streptomyces_rubiginosus Streptomyces rubiginosus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4E3V OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4E3V FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4e3v]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Streptomyces_rubiginosus Streptomyces rubiginosus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4E3V OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4E3V FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=PRO:PROLINE'>PRO</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.503Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4e3u|4e3u]], [[4e3w|4e3w]], [[4e3x|4e3x]]</td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=PRO:PROLINE'>PRO</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Xylose_isomerase Xylose isomerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=5.3.1.5 5.3.1.5] </span></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=4e3v FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4e3v OCA], [https://pdbe.org/4e3v PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4e3v RCSB], [https://www.ebi.ac.uk/pdbsum/4e3v PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4e3v ProSAT]</span></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=4e3v FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4e3v OCA], [http://pdbe.org/4e3v PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4e3v RCSB], [http://www.ebi.ac.uk/pdbsum/4e3v PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4e3v ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/XYLA_STRRU XYLA_STRRU]] Involved in D-xylose catabolism. | + | [https://www.uniprot.org/uniprot/XYLA_STRRU XYLA_STRRU] Involved in D-xylose catabolism. |
| - | <div style="background-color:#fffaf0;">
| + | |
| - | == Publication Abstract from PubMed ==
| + | |
| - | L-Proline is one of Mother Nature's cryoprotectants. Plants and yeast accumulate proline under freeze-induced stress and the use of proline in the cryopreservation of biological samples is well established. Here, it is shown that L-proline is also a useful cryoprotectant for protein crystallography. Proline was used to prepare crystals of lysozyme, xylose isomerase, histidine acid phosphatase and 1-pyrroline-5-carboxylate dehydrogenase for low-temperature data collection. The crystallization solutions in these test cases included the commonly used precipitants ammonium sulfate, sodium chloride and polyethylene glycol and spanned the pH range 4.6-8.5. Thus, proline is compatible with typical protein-crystallization formulations. The proline concentration needed for cryoprotection of these crystals is in the range 2.0-3.0 M. Complete data sets were collected from the proline-protected crystals. Proline performed as well as traditional cryoprotectants based on the diffraction resolution and data-quality statistics. The structures were refined to assess the binding of proline to these proteins. As observed with traditional cryoprotectants such as glycerol and ethylene glycol, the electron-density maps clearly showed the presence of proline molecules bound to the protein. In two cases, histidine acid phosphatase and 1-pyrroline-5-carboxylate dehydrogenase, proline binds in the active site. It is concluded that L-proline is an effective cryoprotectant for protein crystallography.
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| - | | + | |
| - | Proline: Mother Nature's cryoprotectant applied to protein crystallography.,Pemberton TA, Still BR, Christensen EM, Singh H, Srivastava D, Tanner JJ Acta Crystallogr D Biol Crystallogr. 2012 Aug;68(Pt 8):1010-8. Epub 2012 Jul 17. PMID:22868767<ref>PMID:22868767</ref>
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| - | | + | |
| - | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
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| - | </div>
| + | |
| - | <div class="pdbe-citations 4e3v" style="background-color:#fffaf0;"></div>
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| | | | |
| | ==See Also== | | ==See Also== |
| - | *[[D-xylose isomerase|D-xylose isomerase]] | + | *[[D-xylose isomerase 3D structures|D-xylose isomerase 3D structures]] |
| - | == References ==
| + | |
| - | <references/>
| + | |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| | [[Category: Streptomyces rubiginosus]] | | [[Category: Streptomyces rubiginosus]] |
| - | [[Category: Xylose isomerase]]
| + | [[Category: Pemberton TA]] |
| - | [[Category: Pemberton, T A]] | + | [[Category: Tanner JJ]] |
| - | [[Category: Tanner, J J]] | + | |
| - | [[Category: Isomerase]]
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