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1npd

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[[Image:1npd.gif|left|200px]]
 
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==X-RAY STRUCTURE OF SHIKIMATE DEHYDROGENASE COMPLEXED WITH NAD+ FROM E.COLI (YDIB) NORTHEAST STRUCTURAL GENOMICS RESEARCH CONSORTIUM (NESG) TARGET ER24==
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The line below this paragraph, containing "STRUCTURE_1npd", creates the "Structure Box" on the page.
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<StructureSection load='1npd' size='340' side='right'caption='[[1npd]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1npd]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1NPD OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1NPD FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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</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>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene>, <scene name='pdbligand=NAD:NICOTINAMIDE-ADENINE-DINUCLEOTIDE'>NAD</scene></td></tr>
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{{STRUCTURE_1npd| PDB=1npd | SCENE= }}
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1npd FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1npd OCA], [https://pdbe.org/1npd PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1npd RCSB], [https://www.ebi.ac.uk/pdbsum/1npd PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1npd ProSAT], [https://www.topsan.org/Proteins/NESGC/1npd TOPSAN]</span></td></tr>
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</table>
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'''X-RAY STRUCTURE OF SHIKIMATE DEHYDROGENASE COMPLEXED WITH NAD+ FROM E.COLI (YDIB) NORTHEAST STRUCTURAL GENOMICS RESEARCH CONSORTIUM (NESG) TARGET ER24'''
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== Function ==
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[https://www.uniprot.org/uniprot/YDIB_ECOLI YDIB_ECOLI] The physiological substrate is not known.<ref>PMID:12624088</ref>
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== Evolutionary Conservation ==
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==Overview==
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[[Image:Consurf_key_small.gif|200px|right]]
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We present here the 2.3-A crystal structure of the Escherichia coli YdiB protein, an orthologue of shikimate 5-dehydrogenase. This enzyme catalyzes the reduction of 3-dehydroshikimate to shikimate as part of the shikimate pathway, which is absent in mammals but required for the de novo synthesis of aromatic amino acids, quinones, and folate in many other organisms. In this context, the shikimate pathway has been promoted as a target for the development of antimicrobial agents. The crystal structure of YdiB shows that the protomer contains two alpha/beta domains connected by two alpha-helices, with the N-terminal domain being novel and the C-terminal domain being a Rossmann fold. The NAD+ cofactor, which co-purified with the enzyme, is bound to the Rossmann domain in an elongated fashion with the nicotinamide ring in the pro-R conformation. Its binding site contains several unusual features, including a cysteine residue in close apposition to the nicotinamide ring and a clamp over the ribose of the adenosine moiety formed by phenylalanine and lysine residues. The structure explains the specificity for NAD versus NADP in different members of the shikimate dehydrogenase family on the basis of variations in the amino acid identity of several other residues in the vicinity of this ribose group. A cavity lined by residues that are 100% conserved among all shikimate dehydrogenases is found between the two domains of YdiB, in close proximity to the hydride acceptor site on the nicotinamide ring. Shikimate was modeled into this site in a geometry such that all of its heteroatoms form high quality hydrogen bonds with these invariant residues. Their strong conservation in all orthologues supports the possibility of developing broad spectrum inhibitors of this enzyme. The nature and disposition of the active site residues suggest a novel reaction mechanism in which an aspartate acts as the general acid/base catalyst during the hydride transfer reaction.
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Check<jmol>
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<jmolCheckbox>
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==About this Structure==
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/np/1npd_consurf.spt"</scriptWhenChecked>
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1NPD is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1NPD OCA].
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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==Reference==
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</jmolCheckbox>
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The 2.3-A crystal structure of the shikimate 5-dehydrogenase orthologue YdiB from Escherichia coli suggests a novel catalytic environment for an NAD-dependent dehydrogenase., Benach J, Lee I, Edstrom W, Kuzin AP, Chiang Y, Acton TB, Montelione GT, Hunt JF, J Biol Chem. 2003 May 23;278(21):19176-82. Epub 2003 Mar 6. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/12624088 12624088]
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</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=1npd ConSurf].
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<div style="clear:both"></div>
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== References ==
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<references/>
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__TOC__
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</StructureSection>
[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
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[[Category: Shikimate dehydrogenase]]
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[[Category: Large Structures]]
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[[Category: Single protein]]
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[[Category: Acton TB]]
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[[Category: Acton, T B.]]
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[[Category: Benach J]]
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[[Category: Benach, J.]]
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[[Category: Chiang Y]]
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[[Category: Chiang, Y.]]
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[[Category: Hunt JF]]
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[[Category: Hunt, J F.]]
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[[Category: Kuzin AP]]
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[[Category: Kuzin, A P.]]
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[[Category: Lee I]]
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[[Category: Lee, I.]]
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[[Category: Montelione GT]]
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[[Category: Montelione, G T.]]
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[[Category: Rost B]]
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[[Category: NESG, Northeast Structural Genomics Consortium.]]
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[[Category: Rost, B.]]
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[[Category: Nesg]]
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[[Category: Northeast structural genomics consortium]]
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[[Category: Protein structure initiative]]
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[[Category: Psi]]
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[[Category: Structural genomic]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 02:49:02 2008''
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Current revision

X-RAY STRUCTURE OF SHIKIMATE DEHYDROGENASE COMPLEXED WITH NAD+ FROM E.COLI (YDIB) NORTHEAST STRUCTURAL GENOMICS RESEARCH CONSORTIUM (NESG) TARGET ER24

PDB ID 1npd

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