View source for 1nx8


==Structure of carbapenem synthase (CarC) complexed with N-acetyl proline==
<StructureSection load='1nx8' size='340' side='right'caption='[[1nx8]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1nx8]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Pectobacterium_carotovorum Pectobacterium carotovorum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1NX8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1NX8 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=AKG:2-OXOGLUTARIC+ACID'>AKG</scene>, <scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=N7P:1-ACETYL-L-PROLINE'>N7P</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=1nx8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1nx8 OCA], [https://pdbe.org/1nx8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1nx8 RCSB], [https://www.ebi.ac.uk/pdbsum/1nx8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1nx8 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/CARC_PECCC CARC_PECCC] Catalyzes the Fe(2+) and alpha-ketoglutarate-dependent conversion of (3S,5S)-carbapenam to (5R)-carbapenem, an essential step in carbapenem antibiotic biosynthesis.<ref>PMID:9402024</ref> <ref>PMID:12848554</ref> <ref>PMID:15174175</ref> <ref>PMID:12611886</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/nx/1nx8_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=1nx8 ConSurf].
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== Publication Abstract from PubMed ==
The proposed biosynthetic pathway to the carbapenem antibiotics proceeds via epimerization/desaturation of a carbapenam in an unusual process catalyzed by an iron- and 2-oxoglutarate-dependent oxygenase, CarC. Crystal structures of CarC complexed with Fe(II) and 2-oxoglutarate reveal it to be hexameric (space group C2221), consistent with solution studies. CarC monomers contain a double-stranded beta-helix core that supports ligands binding a single Fe(II) to which 2-oxoglutarate complexes in a bi-dentate manner. A structure was obtained with l-N-acetylproline acting as a substrate analogue. Quantum mechanical/molecular mechanical modeling studies with stereoisomers of carbapenams and carbapenems were used to investigate substrate binding. The combined work will stimulate further mechanistic studies and aid in the engineering of carbapenem biosynthesis.

Crystal structure of carbapenem synthase (CarC).,Clifton IJ, Doan LX, Sleeman MC, Topf M, Suzuki H, Wilmouth RC, Schofield CJ J Biol Chem. 2003 Jun 6;278(23):20843-50. Epub 2003 Feb 28. PMID:12611886<ref>PMID:12611886</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 1nx8" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Pectobacterium carotovorum]]
[[Category: Clifton IJ]]
[[Category: Doan LX]]
[[Category: Schofield CJ]]
[[Category: Sleeman MC]]
[[Category: Suzuki H]]
[[Category: Topf M]]
[[Category: Wilmouth RC]]