View source for 6mi1


==CRYSTAL STRUCTURE ANALYSIS OF THE VARIANT PLANT EXOHYDROLASE ARG158ALA-GLU161ALA IN COMPLEX WITH METHYL 6-THIO-BETA-GENTIOBIOSIDE==
<StructureSection load='6mi1' size='340' side='right'caption='[[6mi1]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6mi1]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Hordeum_vulgare_subsp._vulgare Hordeum vulgare subsp. vulgare]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=3wls 3wls]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6MI1 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6MI1 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.3&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BGC:BETA-D-GLUCOSE'>BGC</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=PRD_900098:METHYL+6-THIO-BETA-GENTIOBIOSIDE'>PRD_900098</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=U1Y:methyl+6-thio-beta-D-glucopyranoside'>U1Y</scene></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=6mi1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6mi1 OCA], [https://pdbe.org/6mi1 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6mi1 RCSB], [https://www.ebi.ac.uk/pdbsum/6mi1 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6mi1 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q9XEI3_HORVV Q9XEI3_HORVV] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Substrates associate and products dissociate from enzyme catalytic sites rapidly, which hampers investigations of their trajectories. The high-resolution structure of the native Hordeum exo-hydrolase HvExoI isolated from seedlings reveals that non-covalently trapped glucose forms a stable enzyme-product complex. Here, we report that the alkyl beta-D-glucoside and methyl 6-thio-beta-gentiobioside substrate analogues perfused in crystalline HvExoI bind across the catalytic site after they displace glucose, while methyl 2-thio-beta-sophoroside attaches nearby. Structural analyses and multi-scale molecular modelling of nanoscale reactant movements in HvExoI reveal that upon productive binding of incoming substrates, the glucose product modifies its binding patterns and evokes the formation of a transient lateral cavity, which serves as a conduit for glucose departure to allow for the next catalytic round. This path enables substrate-product assisted processive catalysis through multiple hydrolytic events without HvExoI losing contact with oligo- or polymeric substrates. We anticipate that such enzyme plasticity could be prevalent among exo-hydrolases.

Discovery of processive catalysis by an exo-hydrolase with a pocket-shaped active site.,Streltsov VA, Luang S, Peisley A, Varghese JN, Ketudat Cairns JR, Fort S, Hijnen M, Tvaroska I, Arda A, Jimenez-Barbero J, Alfonso-Prieto M, Rovira C, Mendoza F, Tiessler-Sala L, Sanchez-Aparicio JE, Rodriguez-Guerra J, Lluch JM, Marechal JD, Masgrau L, Hrmova M Nat Commun. 2019 May 20;10(1):2222. doi: 10.1038/s41467-019-09691-z. PMID:31110237<ref>PMID:31110237</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6mi1" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Hordeum vulgare subsp. vulgare]]
[[Category: Large Structures]]
[[Category: Hrmova M]]
[[Category: Luang S]]
[[Category: Streltsov VA]]