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3pb2

From Proteopedia

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Current revision (13:30, 1 March 2024) (edit) (undo)
 
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<StructureSection load='3pb2' size='340' side='right'caption='[[3pb2]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
<StructureSection load='3pb2' size='340' side='right'caption='[[3pb2]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[3pb2]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Atcc_43589 Atcc 43589]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3PB2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3PB2 FirstGlance]. <br>
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<table><tr><td colspan='2'>[[3pb2]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermotoga_maritima Thermotoga maritima]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3PB2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3PB2 FirstGlance]. <br>
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene></td></tr>
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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]] 1.9&#8491;</td></tr>
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[3pb0|3pb0]]</div></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=GOL:GLYCEROL'>GOL</scene></td></tr>
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<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/4-hydroxy-tetrahydrodipicolinate_synthase 4-hydroxy-tetrahydrodipicolinate synthase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.3.3.7 4.3.3.7] </span></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=3pb2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3pb2 OCA], [https://pdbe.org/3pb2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3pb2 RCSB], [https://www.ebi.ac.uk/pdbsum/3pb2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3pb2 ProSAT]</span></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=3pb2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3pb2 OCA], [https://pdbe.org/3pb2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3pb2 RCSB], [https://www.ebi.ac.uk/pdbsum/3pb2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3pb2 ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
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[[https://www.uniprot.org/uniprot/DAPA_THEMA DAPA_THEMA]] Catalyzes the condensation of (S)-aspartate-beta-semialdehyde [(S)-ASA] and pyruvate to 4-hydroxy-tetrahydrodipicolinate (HTPA) (Probable).<ref>PMID:16872276</ref>
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[https://www.uniprot.org/uniprot/DAPA_THEMA DAPA_THEMA] Catalyzes the condensation of (S)-aspartate-beta-semialdehyde [(S)-ASA] and pyruvate to 4-hydroxy-tetrahydrodipicolinate (HTPA) (Probable).<ref>PMID:16872276</ref>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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To gain insights into the role of quaternary structure in the TIM-barrel family of enzymes, we introduced mutations to the DHDPS enzyme of Thermotoga maritima, which we have previously shown to be a stable tetramer in solution. These mutations were aimed at reducing the number of salt bridges at one of the two tetramerization interface of the enzyme, which contains many more interactions than the well characterized equivalent interface of the mesophilic Escherichia coli DHDPS enzyme. The resulting variants had altered quaternary structure, as shown by analytical ultracentrifugation, gel filtration liquid chromatography, and small angle X-ray scattering, and X-ray crystallographic studies confirmed that one variant existed as an independent monomer, but with few changes to the secondary and tertiary structure. Reduction of higher order assembly resulted in a loss of thermal stability, as measured by a variety of methods, and impaired catalytic function. Binding of pyruvate increased the oligomeric status of the variants, with a concomitant increase in thermal stability, suggesting a role for substrate binding in optimizing stable, higher order structures. The results of this work show that the salt bridges located at the tetramerization interface of DHDPS play a significant role in maintaining higher order structures, and demonstrate the importance of quaternary structure in determining protein stability and in the optimization of enzyme catalysis.
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Characterization of monomeric dihydrodipicolinate synthase variant reveals the importance of substrate binding in optimizing oligomerization.,Pearce FG, Dobson RC, Jameson GB, Perugini MA, Gerrard JA Biochim Biophys Acta. 2011 Jul 22. PMID:21803176<ref>PMID:21803176</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 3pb2" style="background-color:#fffaf0;"></div>
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==See Also==
==See Also==
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__TOC__
__TOC__
</StructureSection>
</StructureSection>
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[[Category: 4-hydroxy-tetrahydrodipicolinate synthase]]
 
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[[Category: Atcc 43589]]
 
[[Category: Large Structures]]
[[Category: Large Structures]]
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[[Category: Dobson, R C.J]]
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[[Category: Thermotoga maritima]]
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[[Category: Jameson, G B]]
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[[Category: Dobson RCJ]]
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[[Category: Pearce, F G]]
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[[Category: Jameson GB]]
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[[Category: Lyase]]
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[[Category: Pearce FG]]
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[[Category: Tim-barrel]]
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Current revision

Characterisation of the first monomeric dihydrodipicolinate synthase variant reveals evolutionary insights

PDB ID 3pb2

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