3kcl

<StructureSection load='3kcl' size='340' side='right' caption='[[3kcl]], [[Resolution|resolution]] 2.00&Aring;' scene=''>

<table><tr><td colspan='2'>[[3kcl]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/"actinomyces_rubiginosus"_preobrazhenskaya_et_al._in_gauze_et_al._1957 "actinomyces rubiginosus" preobrazhenskaya et al. in gauze et al. 1957]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3KCL OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3KCL FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CD:CADMIUM+ION'>CD</scene>, <scene name='pdbligand=DOD:DEUTERATED+WATER'>DOD</scene>, <scene name='pdbligand=GLC:ALPHA-D-GLUCOSE'>GLC</scene></td></tr>

<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3kbj|3kbj]], [[3kbm|3kbm]], [[3kbn|3kbn]], [[3kbs|3kbs]], [[3kbv|3kbv]], [[3kbw|3kbw]], [[3kcj|3kcj]], [[3kco|3kco]]</td></tr>

<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">xylA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1929 "Actinomyces rubiginosus" Preobrazhenskaya et al. in Gauze et al. 1957])</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'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3kcl FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3kcl OCA], [http://pdbe.org/3kcl PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3kcl RCSB], [http://www.ebi.ac.uk/pdbsum/3kcl PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3kcl ProSAT]</span></td></tr>

[[http://www.uniprot.org/uniprot/XYLA_STRRU XYLA_STRRU]] Involved in D-xylose catabolism.

<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/kc/3kcl_consurf.spt"</scriptWhenChecked>

<div style="background-color:#fffaf0;">

== Publication Abstract from PubMed ==

Conversion of aldo to keto sugars by the metalloenzyme D-xylose isomerase (XI) is a multistep reaction that involves hydrogen transfer. We have determined the structure of this enzyme by neutron diffraction in order to locate H atoms (or their isotope D). Two studies are presented, one of XI containing cadmium and cyclic D-glucose (before sugar ring opening has occurred), and the other containing nickel and linear D-glucose (after ring opening has occurred but before isomerization). Previously we reported the neutron structures of ligand-free enzyme and enzyme with bound product. The data show that His54 is doubly protonated on the ring N in all four structures. Lys289 is neutral before ring opening and gains a proton after this; the catalytic metal-bound water is deprotonated to hydroxyl during isomerization and O5 is deprotonated. These results lead to new suggestions as to how changes might take place over the course of the reaction.

Metal ion roles and the movement of hydrogen during reaction catalyzed by D-xylose isomerase: a joint x-ray and neutron diffraction study.,Kovalevsky AY, Hanson L, Fisher SZ, Mustyakimov M, Mason SA, Forsyth VT, Blakeley MP, Keen DA, Wagner T, Carrell HL, Katz AK, Glusker JP, Langan P Structure. 2010 Jun 9;18(6):688-99. PMID:20541506<ref>PMID:20541506</ref>

 

[[Category: Actinomyces rubiginosus preobrazhenskaya et al. in gauze et al. 1957]]

[[Category: Xylose isomerase]]

[[Category: Kovalevsky, A Y]]

[[Category: Langan, P]]

[[Category: Xylose metabolism]]