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[[Image:2jch.gif|left|200px]]<br />
<applet load="2jch" size="450" color="white" frame="true" align="right" spinBox="true"
caption="2jch, resolution 2.40&Aring;" />
'''STRUCTURAL AND MECHANISTIC BASIS OF PENICILLIN BINDING PROTEIN INHIBITION BY LACTIVICINS'''<br />


==Overview==
==Structural and mechanistic basis of penicillin binding protein inhibition by lactivicins==
beta-lactam antibiotics, including penicillins and cephalosporins, inhibit, penicillin-binding proteins (PBPs), which are essential for bacterial cell, wall biogenesis. Pathogenic bacteria have evolved efficient antibiotic, resistance mechanisms that, in Gram-positive bacteria, include mutations, to PBPs that enable them to avoid beta-lactam inhibition. Lactivicin (LTV;, 1) contains separate cycloserine and gamma-lactone rings and is the only, known natural PBP inhibitor that does not contain a beta-lactam. Here we, show that LTV and a more potent analog, phenoxyacetyl-LTV (PLTV; 2), are, active against clinically isolated, penicillin-resistant Streptococcus, pneumoniae strains. Crystallographic analyses of S. pneumoniae PBP1b, reveal that LTV and PLTV inhibition involves opening of both ... [[http://ispc.weizmann.ac.il/pmbin/getpm?17676039 (full description)]]
<StructureSection load='2jch' size='340' side='right'caption='[[2jch]], [[Resolution|resolution]] 2.40&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2jch]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Streptococcus_pneumoniae_R6 Streptococcus pneumoniae R6]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2JCH OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2JCH 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]] 2.4&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=PL7:(2E)-2-({(2S)-2-CARBOXY-2-[(PHENOXYACETYL)AMINO]ETHOXY}IMINO)PENTANEDIOIC+ACID'>PL7</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=2jch FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2jch OCA], [https://pdbe.org/2jch PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2jch RCSB], [https://www.ebi.ac.uk/pdbsum/2jch PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2jch ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/O70038_STREE O70038_STREE]
== 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/jc/2jch_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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=2jch ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Beta-lactam antibiotics, including penicillins and cephalosporins, inhibit penicillin-binding proteins (PBPs), which are essential for bacterial cell wall biogenesis. Pathogenic bacteria have evolved efficient antibiotic resistance mechanisms that, in Gram-positive bacteria, include mutations to PBPs that enable them to avoid beta-lactam inhibition. Lactivicin (LTV; 1) contains separate cycloserine and gamma-lactone rings and is the only known natural PBP inhibitor that does not contain a beta-lactam. Here we show that LTV and a more potent analog, phenoxyacetyl-LTV (PLTV; 2), are active against clinically isolated, penicillin-resistant Streptococcus pneumoniae strains. Crystallographic analyses of S. pneumoniae PBP1b reveal that LTV and PLTV inhibition involves opening of both monocyclic cycloserine and gamma-lactone rings. In PBP1b complexes, the ring-derived atoms from LTV and PLTV show a notable structural convergence with those derived from a complexed cephalosporin (cefotaxime; 3). The structures imply that derivatives of LTV will be useful in the search for new antibiotics with activity against beta-lactam-resistant bacteria.


==About this Structure==
Structural and mechanistic basis of penicillin-binding protein inhibition by lactivicins.,Macheboeuf P, Fischer DS, Brown T Jr, Zervosen A, Luxen A, Joris B, Dessen A, Schofield CJ Nat Chem Biol. 2007 Sep;3(9):565-9. Epub 2007 Aug 5. PMID:17676039<ref>PMID:17676039</ref>
2JCH is a [[http://en.wikipedia.org/wiki/Single_protein Single protein]] structure of sequence from [[http://en.wikipedia.org/wiki/Streptococcus_pneumoniae_r6 Streptococcus pneumoniae r6]] with SO4, CL, EDO and PL7 as [[http://en.wikipedia.org/wiki/ligands ligands]]. Structure known Active Site: AC1. Full crystallographic information is available from [[http://ispc.weizmann.ac.il/oca-bin/ocashort?id=2JCH OCA]].


==Reference==
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
Structural and mechanistic basis of penicillin-binding protein inhibition by lactivicins., Macheboeuf P, Fischer DS, Brown T Jr, Zervosen A, Luxen A, Joris B, Dessen A, Schofield CJ, Nat Chem Biol. 2007 Aug 5;. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=17676039 17676039]
</div>
[[Category: Single protein]]
<div class="pdbe-citations 2jch" style="background-color:#fffaf0;"></div>
[[Category: Streptococcus pneumoniae r6]]
[[Category: Brown, T.J.]]
[[Category: Dessen, A.]]
[[Category: Fisher, D.S.]]
[[Category: Joris, B.]]
[[Category: Luxen, A.]]
[[Category: Macheboeuf, P.]]
[[Category: Schofield, C.J.]]
[[Category: Zervosen, A.]]
[[Category: CL]]
[[Category: EDO]]
[[Category: PL7]]
[[Category: SO4]]
[[Category: binding protein]]
[[Category: cell wall]]
[[Category: drug-binding protein]]
[[Category: gamma lactam antibiotics]]
[[Category: peptidoglycan]]
[[Category: peptidoglycan synthesis multifunctional enzyme]]


''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Oct 30 11:14:17 2007''
==See Also==
*[[Penicillin-binding protein 3D structures|Penicillin-binding protein 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Streptococcus pneumoniae R6]]
[[Category: Brown TJ]]
[[Category: Dessen A]]
[[Category: Fisher DS]]
[[Category: Joris B]]
[[Category: Luxen A]]
[[Category: Macheboeuf P]]
[[Category: Schofield CJ]]
[[Category: Zervosen A]]
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