4e0c: Difference between revisions

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-[[Image:4e0c.jpg|left|200px]]
+==1.8 Angstrom Resolution Crystal Structure of Transaldolase from Francisella tularensis (phosphate-free)==
+<StructureSection load='4e0c' size='340' side='right' caption='[[4e0c]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
+== Structural highlights ==
+<table><tr><td colspan='2'>[[4e0c]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Fratt Fratt]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4E0C OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4E0C FirstGlance]. <br>
+</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene><br>
+<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3igx|3igx]], [[3tk7|3tk7]], [[3tno|3tno]], [[3upb|3upb]], [[3te9|3te9]], [[3tkf|3tkf]]</td></tr>
+<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">FTT_1093c, talA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=177416 FRATT])</td></tr>
+<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Transaldolase Transaldolase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.2.1.2 2.2.1.2] </span></td></tr>
+<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4e0c FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4e0c OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4e0c RCSB], [http://www.ebi.ac.uk/pdbsum/4e0c PDBsum]</span></td></tr>
+<table>
+<div style="background-color:#fffaf0;">
+== Publication Abstract from PubMed ==
+The Burgi-Dunitz angle (alphaBD) describes the trajectory of approach of a nucleophile to an electrophile. The adoption of a stereoelectronically favorable alphaBD can necessitate significant reactive-group repositioning over the course of bond formation. In the context of enzyme catalysis, interactions with the protein constrain substrate rotation, which could necessitate structural transformations during bond formation. To probe this theoretical framework vis-a-vis biocatalysis, Schiff-base formation was analysed in Francisella tularensis transaldolase (TAL). Crystal structures of wild-type and Lys--&gt;Met mutant TAL in covalent and noncovalent complexes with fructose 6-phosphate and sedoheptulose 7-phosphate clarify the mechanism of catalysis and reveal that substrate keto moieties undergo significant conformational changes during Schiff-base formation. Structural changes compelled by the trajectory considerations discussed here bear relevance to bond formation in a variety of constrained enzymic/engineered systems and can inform the design of covalent therapeutics.
-<!--
+Adherence to Burgi-Dunitz stereochemical principles requires significant structural rearrangements in Schiff-base formation: insights from transaldolase complexes.,Light SH, Minasov G, Duban ME, Anderson WF Acta Crystallogr D Biol Crystallogr. 2014 Feb;70(Pt 2):544-52. doi:, 10.1107/S1399004713030666. Epub 2014 Jan 31. PMID:24531488<ref>PMID:24531488</ref>
-The line below this paragraph, containing "STRUCTURE_4e0c", creates the "Structure Box" on the page.
-You may change the PDB parameter (which sets the PDB file loaded into the applet)
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--->
-{{STRUCTURE_4e0c|  PDB=4e0c  |  SCENE=  }}
-===1.8 Angstrom Resolution Crystal Structure of Transaldolase from Francisella tularensis (phosphate-free)===
+From MEDLINEÂ®/PubMedÂ®, a database of the U.S. National Library of Medicine.<br>
+</div>
+== References ==
-==About this Structure==
+<references/>
-[[4e0c]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Francisella_tularensis_subsp._tularensis Francisella tularensis subsp. tularensis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4E0C OCA].
+__TOC__
-[[Category: Francisella tularensis subsp. tularensis]]
+</StructureSection>
+[[Category: Fratt]]
 [[Category: Transaldolase]]
 [[Category: Anderson, W F.]]