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[[Image:2vr4.png|left|200px]]
==TRANSITION-STATE MIMICRY IN MANNOSIDE HYDROLYSIS: CHARACTERISATION OF TWENTY SIX INHIBITORS AND INSIGHT INTO BINDING FROM LINEAR FREE ENERGY RELATIONSHIPS AND 3-D STRUCTURE==
<StructureSection load='2vr4' size='340' side='right' caption='[[2vr4]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2vr4]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Bacteroides_thetaiotaomicron Bacteroides thetaiotaomicron]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2VR4 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2VR4 FirstGlance]. <br>
</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=17B:(2Z,3R,4S,5R,6R)-2-[(4-AMINOBUTYL)IMINO]-6-(HYDROXYMETHYL)PIPERIDINE-3,4,5-TRIOL'>17B</scene>, <scene name='pdbligand=BR:BROMIDE+ION'>BR</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene><br>
<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2vot|2vot]], [[2vqt|2vqt]], [[2vl4|2vl4]], [[2vqu|2vqu]], [[2vo5|2vo5]], [[2je8|2je8]], [[2vjx|2vjx]], [[2vmf|2vmf]]</td></tr>
<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Beta-mannosidase Beta-mannosidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.25 3.2.1.25] </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=2vr4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2vr4 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2vr4 RCSB], [http://www.ebi.ac.uk/pdbsum/2vr4 PDBsum]</span></td></tr>
<table>
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/vr/2vr4_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/chain_selection.php?pdb_ID=2ata ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Enzyme inhibition through mimicry of the transition state is a major area for the design of new therapeutic agents. Emerging evidence suggests that many retaining glycosidases that are active on alpha- or beta-mannosides harness unusual B2,5 (boat) transition states. Here we present the analysis of 25 putative beta-mannosidase inhibitors, whose Ki values range from nanomolar to millimolar, on the Bacteroides thetaiotaomicron beta-mannosidase BtMan2A. B2,5 or closely related conformations were observed for all tightly binding compounds. Subsequent linear free energy relationships that correlate log Ki with log Km/kcat for a series of active center variants highlight aryl-substituted mannoimidazoles as powerful transition state mimics in which the binding energy of the aryl group enhances both binding and the degree of transition state mimicry. Support for a B2,5 transition state during enzymatic beta-mannosidase hydrolysis should also facilitate the design and exploitation of transition state mimics for the inhibition of retaining alpha-mannosidases--an area that is emerging for anticancer therapeutics.


{{STRUCTURE_2vr4|  PDB=2vr4  |  SCENE=  }}
Structural and biochemical evidence for a boat-like transition state in beta-mannosidases.,Tailford LE, Offen WA, Smith NL, Dumon C, Morland C, Gratien J, Heck MP, Stick RV, Bleriot Y, Vasella A, Gilbert HJ, Davies GJ Nat Chem Biol. 2008 May;4(5):306-12. PMID:18408714<ref>PMID:18408714</ref>


===TRANSITION-STATE MIMICRY IN MANNOSIDE HYDROLYSIS: CHARACTERISATION OF TWENTY SIX INHIBITORS AND INSIGHT INTO BINDING FROM LINEAR FREE ENERGY RELATIONSHIPS AND 3-D STRUCTURE===
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 
</div>
{{ABSTRACT_PUBMED_18408714}}
 
==About this Structure==
[[2vr4]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Bacteroides_thetaiotaomicron Bacteroides thetaiotaomicron]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2VR4 OCA].


==See Also==
==See Also==
*[[Mannosidase|Mannosidase]]
*[[Mannosidase|Mannosidase]]
 
== References ==
==Reference==
<references/>
<ref group="xtra">PMID:018408714</ref><references group="xtra"/>
__TOC__
</StructureSection>
[[Category: Bacteroides thetaiotaomicron]]
[[Category: Bacteroides thetaiotaomicron]]
[[Category: Beta-mannosidase]]
[[Category: Beta-mannosidase]]
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