2hbx

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[[Image:2hbx.gif|left|200px]]
 
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==Crystal Structure of alpha-Amino-beta-Carboxymuconate-epsilon-Semialdehyde-Decarboxylase (ACMSD)==
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The line below this paragraph, containing "STRUCTURE_2hbx", creates the "Structure Box" on the page.
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<StructureSection load='2hbx' size='340' side='right'caption='[[2hbx]], [[Resolution|resolution]] 2.50&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'>[[2hbx]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Pseudomonas_fluorescens Pseudomonas fluorescens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2HBX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2HBX 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]] 2.5&#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=CO:COBALT+(II)+ION'>CO</scene></td></tr>
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{{STRUCTURE_2hbx| PDB=2hbx | 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=2hbx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2hbx OCA], [https://pdbe.org/2hbx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2hbx RCSB], [https://www.ebi.ac.uk/pdbsum/2hbx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2hbx ProSAT]</span></td></tr>
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</table>
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'''Crystal Structure of alpha-Amino-beta-Carboxymuconate-epsilon-Semialdehye-Decarboxylase (ACMSD)'''
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== Function ==
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[https://www.uniprot.org/uniprot/Q83V25_PSEFL Q83V25_PSEFL]
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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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Alpha-amino-beta-carboxymuconate-epsilon-semialdehyde decarboxylase (ACMSD) is a widespread enzyme found in many bacterial species and all currently sequenced eukaryotic organisms. It occupies a key position at the branching point of two metabolic pathways: the tryptophan to quinolinate pathway and the bacterial 2-nitrobenzoic acid degradation pathway. The activity of ACMSD determines whether the metabolites in both pathways are converted to quinolinic acid for NAD biosynthesis or to acetyl-CoA for the citric acid cycle. Here we report the first high-resolution crystal structure of ACMSD from Pseudomonas fluorescens which validates our previous predictions that this enzyme is a member of the metal-dependent amidohydrolase superfamily of the (beta/alpha)(8) TIM barrel fold. The structure of the enzyme in its native form, determined at 1.65 A resolution, reveals the precise spatial arrangement of the active site metal center and identifies a potential substrate-binding pocket. The identity of the native active site metal was determined to be Zn. Also determined was the structure of the enzyme complexed with cobalt at 2.50 A resolution. The hydrogen bonding network around the metal center suggests that Arg51 and His228 may play important roles in catalysis. The metal center configuration of PfACMSD is very similar to that of Zn-dependent adenosine deaminase and Fe-dependent cytosine deaminase, suggesting that ACMSD may share certain similarities in its catalytic mechanism with these enzymes. These data enable us to propose possible catalytic mechanisms for ACMSD which appear to be unprecedented among all currently characterized decarboxylases.
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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/hb/2hbx_consurf.spt"</scriptWhenChecked>
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2HBX is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Pseudomonas_fluorescens Pseudomonas fluorescens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2HBX 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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Crystal structure of alpha-amino-beta-carboxymuconate-epsilon-semialdehyde decarboxylase: insight into the active site and catalytic mechanism of a novel decarboxylation reaction., Martynowski D, Eyobo Y, Li T, Yang K, Liu A, Zhang H, Biochemistry. 2006 Sep 5;45(35):10412-21. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16939194 16939194]
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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=2hbx ConSurf].
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<div style="clear:both"></div>
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__TOC__
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</StructureSection>
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[[Category: Large Structures]]
[[Category: Pseudomonas fluorescens]]
[[Category: Pseudomonas fluorescens]]
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[[Category: Single protein]]
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[[Category: Eyobo Y]]
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[[Category: Eyobo, Y.]]
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[[Category: Li T]]
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[[Category: Li, T.]]
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[[Category: Liu A]]
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[[Category: Liu, A.]]
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[[Category: Martynowski D]]
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[[Category: Martynowski, D.]]
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[[Category: Yang K]]
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[[Category: Yang, K.]]
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[[Category: Zhang H]]
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[[Category: Zhang, H.]]
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[[Category: Acmsd]]
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[[Category: Decarboxylase]]
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[[Category: Metaloenzyme]]
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[[Category: Tim-barrel]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 06:06:12 2008''
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Current revision

Crystal Structure of alpha-Amino-beta-Carboxymuconate-epsilon-Semialdehyde-Decarboxylase (ACMSD)

PDB ID 2hbx

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