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1aw5

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[[Image:1aw5.gif|left|200px]]<br /><applet load="1aw5" size="350" color="white" frame="true" align="right" spinBox="true"
 
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caption="1aw5, resolution 2.3&Aring;" />
 
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'''5-AMINOLEVULINATE DEHYDRATASE FROM SACCHAROMYCES CEREVISIAE'''<br />
 
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==Overview==
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==5-AMINOLEVULINATE DEHYDRATASE FROM SACCHAROMYCES CEREVISIAE==
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5-Aminolaevulinate dehydratase (ALAD) is a homo-octameric metallo-enzyme that catalyses the formation of porphobilinogen from 5-aminolaevulinic acid. The structure of the yeast enzyme has been solved to 2.3 A resolution, revealing that each subunit adopts a TIM barrel fold with a 39 residue N-terminal arm. Pairs of monomers wrap their arms around each other to form compact dimers and these associate to form a 422 symmetric octamer. All eight active sites are on the surface of the octamer and possess two lysine residues (210 and 263), one of which, Lys 263, forms a Schiff base link to the substrate. The two lysine side chains are close to two zinc binding sites one of which is formed by three cysteine residues (133, 135 and 143) while the other involves Cys 234 and His 142. ALAD has features at its active site that are common to both metallo- and Schiff base-aldolases and therefore represents an intriguing combination of both classes of enzyme. Lead ions, which inhibit ALAD potently, replace the zinc bound to the enzyme's unique triple-cysteine site.
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<StructureSection load='1aw5' size='340' side='right'caption='[[1aw5]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1aw5]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1AW5 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1AW5 FirstGlance]. <br>
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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=ZN:ZINC+ION'>ZN</scene></td></tr>
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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=1aw5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1aw5 OCA], [https://pdbe.org/1aw5 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1aw5 RCSB], [https://www.ebi.ac.uk/pdbsum/1aw5 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1aw5 ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/HEM2_YEAST HEM2_YEAST] Catalyzes an early step in the biosynthesis of tetrapyrroles. Binds two molecules of 5-aminolevulinate per subunit, each at a distinct site, and catalyzes their condensation to form porphobilinogen.
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/aw/1aw5_consurf.spt"</scriptWhenChecked>
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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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</jmolCheckbox>
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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=1aw5 ConSurf].
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<div style="clear:both"></div>
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==About this Structure==
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==See Also==
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1AW5 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae] with <scene name='pdbligand=ZN:'>ZN</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [http://en.wikipedia.org/wiki/Porphobilinogen_synthase Porphobilinogen synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.2.1.24 4.2.1.24] Known structural/functional Site: <scene name='pdbsite=CAT:LYS+263+Forms+Schiff+Base+w.+Substrate.+LYS+210+Is+Spati+...'>CAT</scene>. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1AW5 OCA].
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*[[Porphobilinogen synthase|Porphobilinogen synthase]]
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__TOC__
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==Reference==
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</StructureSection>
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X-ray structure of 5-aminolaevulinate dehydratase, a hybrid aldolase., Erskine PT, Senior N, Awan S, Lambert R, Lewis G, Tickle IJ, Sarwar M, Spencer P, Thomas P, Warren MJ, Shoolingin-Jordan PM, Wood SP, Cooper JB, Nat Struct Biol. 1997 Dec;4(12):1025-31. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=9406553 9406553]
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[[Category: Large Structures]]
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[[Category: Porphobilinogen synthase]]
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[[Category: Saccharomyces cerevisiae]]
[[Category: Saccharomyces cerevisiae]]
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[[Category: Single protein]]
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[[Category: Cooper JB]]
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[[Category: Cooper, J B.]]
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[[Category: Erskine PT]]
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[[Category: Erskine, P T.]]
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[[Category: Wood SP]]
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[[Category: Wood, S P.]]
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[[Category: ZN]]
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[[Category: aldolase]]
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[[Category: dehydratase]]
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[[Category: tetrapyrrole biosynthesis]]
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[[Category: tim-barrel octamer]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 11:48:52 2008''
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Current revision

5-AMINOLEVULINATE DEHYDRATASE FROM SACCHAROMYCES CEREVISIAE

PDB ID 1aw5

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