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1lvl

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(New page: 200px<br /><applet load="1lvl" size="450" color="white" frame="true" align="right" spinBox="true" caption="1lvl, resolution 2.45&Aring;" /> '''THE REFINED STRUCTUR...)
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[[Image:1lvl.gif|left|200px]]<br /><applet load="1lvl" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1lvl, resolution 2.45&Aring;" />
 
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'''THE REFINED STRUCTURE OF PSEUDOMONAS PUTIDA LIPOAMIDE DEHYDROGENASE COMPLEXED WITH NAD+ AT 2.45 ANGSTROMS RESOLUTION'''<br />
 
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==Overview==
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==THE REFINED STRUCTURE OF PSEUDOMONAS PUTIDA LIPOAMIDE DEHYDROGENASE COMPLEXED WITH NAD+ AT 2.45 ANGSTROMS RESOLUTION==
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The three-dimensional structure of one of the three lipoamide, dehydrogenases occurring in Pseudomonas putida, LipDH Val, has been, determined at 2.45 A resolution. The orthorhombic crystals, grown in the, presence of 20 mM NAD+, contain 458 residues per asymmetric unit. A, crystallographic 2-fold axis generates the dimer which is observed in, solution. The final crystallographic R-factor is 21.8% for 18,216 unique, reflections and a model consisting of 3,452 protein atoms, 189 solvent, molecules and 44 NAD+ atoms, while the overall B-factor is unusually high:, 47 A2. The structure of LipDH Val reveals the conformation of the, C-terminal residues which fold "back" into the putative lipoamide binding, region. The C-terminus has been proven to be important for activity by, site-directed mutagenesis. However, the distance of the C-terminus to the, catalytically essential residues is surprisingly large, over 6 A, and the, precise role of the C-terminus still needs to be elucidated. In this, crystal form LipDH Val contains one NAD+ molecule per subunit. Its, adenine-ribose moiety occupies an analogous position as in the structure, of glutathione reductase. However, the nicotinamide-ribose moiety is far, removed from its expected position near the isoalloxazine ring and points, into solution. Comparison of LipDH Val with Azotobacter vinelandii, lipoamide dehydrogenase yields an rms difference of 1.6 A for 440 well, defined C alpha atoms per subunit. Comparing LipDH Val with glutathione, reductase shows large differences in the tertiary and quaternary structure, of the two enzymes. For instance, the two subunits in the dimer are, shifted by 6 A with respect to each other. So, LipDH Val confirms the, surprising differences in molecular architecture between glutathione, reductase and lipoamide dehydrogenase, which were already observed in, Azotobacter vinelandii LipDH. This is the more remarkable since the active, sites are located at the subunit interface and are virtually identical in, all three enzymes.
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<StructureSection load='1lvl' size='340' side='right'caption='[[1lvl]], [[Resolution|resolution]] 2.45&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1lvl]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Pseudomonas_putida Pseudomonas putida]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1LVL OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1LVL 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]] 2.45&#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=FAD:FLAVIN-ADENINE+DINUCLEOTIDE'>FAD</scene>, <scene name='pdbligand=NAD:NICOTINAMIDE-ADENINE-DINUCLEOTIDE'>NAD</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=1lvl FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1lvl OCA], [https://pdbe.org/1lvl PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1lvl RCSB], [https://www.ebi.ac.uk/pdbsum/1lvl PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1lvl ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/DLDH1_PSEPU DLDH1_PSEPU] The branched-chain alpha-keto dehydrogenase complex catalyzes the overall conversion of alpha-keto acids to acyl-CoA and CO(2). It contains multiple copies of 3 enzymatic components: branched-chain alpha-keto acid decarboxylase (E1), lipoamide acyltransferase (E2) and lipoamide dehydrogenase (E3).
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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/lv/1lvl_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=1lvl 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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1LVL is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Pseudomonas_putida Pseudomonas putida] with FAD and NAD as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Dihydrolipoyl_dehydrogenase Dihydrolipoyl dehydrogenase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.8.1.4 1.8.1.4] Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1LVL OCA].
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*[[Dihydrolipoamide dehydrogenase|Dihydrolipoamide dehydrogenase]]
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__TOC__
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==Reference==
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</StructureSection>
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The refined crystal structure of Pseudomonas putida lipoamide dehydrogenase complexed with NAD+ at 2.45 A resolution., Mattevi A, Obmolova G, Sokatch JR, Betzel C, Hol WG, Proteins. 1992 Aug;13(4):336-51. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=1325638 1325638]
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[[Category: Large Structures]]
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[[Category: Dihydrolipoyl dehydrogenase]]
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[[Category: Pseudomonas putida]]
[[Category: Pseudomonas putida]]
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[[Category: Single protein]]
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[[Category: Hol WGJ]]
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[[Category: Hol, W.G.J.]]
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[[Category: Mattevi A]]
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[[Category: Mattevi, A.]]
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[[Category: FAD]]
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[[Category: NAD]]
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[[Category: oxidoreductase]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Nov 20 20:55:23 2007''
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Current revision

THE REFINED STRUCTURE OF PSEUDOMONAS PUTIDA LIPOAMIDE DEHYDROGENASE COMPLEXED WITH NAD+ AT 2.45 ANGSTROMS RESOLUTION

PDB ID 1lvl

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