View source for 3hrh


==Crystal Structure of Antigen 85C and Glycerol==
<StructureSection load='3hrh' size='340' side='right'caption='[[3hrh]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3hrh]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Mycobacterium_tuberculosis Mycobacterium tuberculosis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3HRH OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3HRH 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=GOL:GLYCEROL'>GOL</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=3hrh FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3hrh OCA], [https://pdbe.org/3hrh PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3hrh RCSB], [https://www.ebi.ac.uk/pdbsum/3hrh PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3hrh ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/A85C_MYCTU A85C_MYCTU] The antigen 85 proteins (FbpA, FbpB, FbpC) are responsible for the high affinity of mycobacteria to fibronectin, a large adhesive glycoprotein, which facilitates the attachment of M.tuberculosis to murine alveolar macrophages (AMs). They also help to maintain the integrity of the cell wall by catalyzing the transfer of mycolic acids to cell wall arabinogalactan and through the synthesis of alpha,alpha-trehalose dimycolate (TDM, cord factor). They catalyze the transfer of a mycoloyl residue from one molecule of alpha,alpha-trehalose monomycolate (TMM) to another TMM, leading to the formation of TDM.<ref>PMID:1830294</ref> <ref>PMID:9162010</ref> 
== 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/hr/3hrh_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/main_output.php?pdb_ID=3hrh ConSurf].
<div style="clear:both"></div>
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== Publication Abstract from PubMed ==
Peptide-based 1,2-dicarbonyl compounds have emerged as potent inhibitors for serine proteases. Herein, we have designed and synthesized d-arabinose and d-trehalose-based esters, alpha-ketoesters and alpha-ketoamides, and evaluated their inhibitory activity against Mycobacterium tuberculosis (Mtb) antigen 85C (ag85C), an acyltransferase in the serine hydrolase superfamily. In addition the compounds were evaluated for the ability to inhibit the growth of Mycobacterium smegmatis ATCC 14 468, a non-pathogenic surrogate for Mtb. Among the synthetic analogs evaluated only the methyl ester derived from d-arabinose was found to inhibit the acyltransferase activity of ag85C (IC(50) = 25 mM). Based on this weak inhibitory activity it was not surprising that none of the compounds inhibits the growth of M. smegmatis. In spite of the weak inhibitory activity of , X-ray crystallography on crystals of ag85C soaked with suggested the formation of a covalent ester adduct between and the Ser124 side chain hydroxyl moiety found within the catalytic site of ag85C; however, some of the active site electron density appears to result from bound glycerol. The lack of activity associated with the alpha-ketoester and alpha-ketoamide derivatives of d-trehalose may be the result of intramolecular cyclization of the alpha-keto moiety with the nearby C-4/4' hydroxyls leading to the formation of stable bicyclo-ester and amide derivatives.

Design, synthesis and biological evaluation of sugar-derived esters, alpha-ketoesters and alpha-ketoamides as inhibitors for Mycobacterium tuberculosis antigen 85C.,Sanki AK, Boucau J, Umesiri FE, Ronning DR, Sucheck SJ Mol Biosyst. 2009 Sep;5(9):945-56. Epub 2009 Jun 19. PMID:19668859<ref>PMID:19668859</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 3hrh" style="background-color:#fffaf0;"></div>

==See Also==
*[[Antigen 85 3D structures|Antigen 85 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Mycobacterium tuberculosis]]
[[Category: Boucau J]]
[[Category: Ronning DR]]
[[Category: Sanki AK]]
[[Category: Sucheck SJ]]
[[Category: Umesiri FE]]