4h2c: Difference between revisions
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==Trehalulose synthase MutB R284C mutant== | ==Trehalulose synthase MutB R284C mutant== | ||
<StructureSection load='4h2c' size='340' side='right' caption='[[4h2c]], [[Resolution|resolution]] 1.70Å' scene=''> | <StructureSection load='4h2c' size='340' side='right' caption='[[4h2c]], [[Resolution|resolution]] 1.70Å' scene=''> | ||
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<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">mutB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1071045 Rhizobium sp. MX-45])</td></tr> | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">mutB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1071045 Rhizobium sp. MX-45])</td></tr> | ||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Isomerase Isomerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=5.4.11.99 5.4.11.99] </span></td></tr> | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Isomerase Isomerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=5.4.11.99 5.4.11.99] </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=4h2c FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4h2c OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4h2c RCSB], [http://www.ebi.ac.uk/pdbsum/4h2c PDBsum]</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=4h2c FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4h2c OCA], [http://pdbe.org/4h2c PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4h2c RCSB], [http://www.ebi.ac.uk/pdbsum/4h2c PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4h2c ProSAT]</span></td></tr> | ||
</table> | </table> | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | </div> | ||
<div class="pdbe-citations 4h2c" style="background-color:#fffaf0;"></div> | |||
==See Also== | ==See Also== | ||
Revision as of 23:13, 4 August 2016
Trehalulose synthase MutB R284C mutantTrehalulose synthase MutB R284C mutant
Structural highlights
Publication Abstract from PubMedSucrose isomerase is an enzyme that catalyzes the production of sucrose isomers of high biotechnological and pharmaceutical interest. Owing to the complexity of the chemical synthesis of these isomers, isomaltulose and trehalulose, enzymatic conversion remains the preferred method for obtaining these products. Depending on the microbial source, the ratio of the sucrose-isomer products varies significantly. In studies aimed at understanding and explaining the underlying molecular mechanisms of these reactions, mutations obtained using a random-mutagenesis approach displayed a major hydrolytic activity. Two of these variants, R284C and F164L, of sucrose isomerase from Rhizobium sp. were therefore crystallized and their crystal structures were determined. The three-dimensional structures of these mutants allowed the identification of the molecular determinants that favour hydrolytic activity compared with transferase activity. Substantial conformational changes resulting in an active-site opening were observed, as were changes in the pattern of water molecules bordering the active-site region. Mutations inducing an active-site aperture in Rhizobium sp. sucrose isomerase confer hydrolytic activity.,Lipski A, Watzlawick H, Ravaud S, Robert X, Rhimi M, Haser R, Mattes R, Aghajari N Acta Crystallogr D Biol Crystallogr. 2013 Feb;69(Pt 2):298-307. doi:, 10.1107/S0907444912045532. Epub 2013 Jan 19. PMID:23385465[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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