3ggp: Difference between revisions
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<StructureSection load='3ggp' size='340' side='right'caption='[[3ggp]], [[Resolution|resolution]] 2.25Å' scene=''> | <StructureSection load='3ggp' size='340' side='right'caption='[[3ggp]], [[Resolution|resolution]] 2.25Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[3ggp]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/ | <table><tr><td colspan='2'>[[3ggp]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Aquifex_aeolicus Aquifex aeolicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3GGP OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3GGP FirstGlance]. <br> | ||
</td></tr><tr id=' | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.25Å</td></tr> | ||
<tr id=' | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=HPP:HYDROXYPHENYL+PROPIONIC+ACID'>HPP</scene>, <scene name='pdbligand=NAD:NICOTINAMIDE-ADENINE-DINUCLEOTIDE'>NAD</scene></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=3ggp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3ggp OCA], [https://pdbe.org/3ggp PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3ggp RCSB], [https://www.ebi.ac.uk/pdbsum/3ggp PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3ggp 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=3ggp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3ggp OCA], [https://pdbe.org/3ggp PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3ggp RCSB], [https://www.ebi.ac.uk/pdbsum/3ggp PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3ggp ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | |||
[https://www.uniprot.org/uniprot/O67636_AQUAE O67636_AQUAE] | |||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
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__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Aquifex aeolicus | [[Category: Aquifex aeolicus]] | ||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: Christendat | [[Category: Christendat D]] | ||
[[Category: Kimber | [[Category: Kimber MS]] | ||
[[Category: Shahinas | [[Category: Shahinas D]] | ||
[[Category: Sun | [[Category: Sun W]] | ||
Latest revision as of 10:05, 6 September 2023
Crystal structure of prephenate dehydrogenase from A. aeolicus in complex with hydroxyphenyl propionate and NAD+Crystal structure of prephenate dehydrogenase from A. aeolicus in complex with hydroxyphenyl propionate and NAD+
Structural highlights
FunctionEvolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedTyrA proteins belong to a family of dehydrogenases that are dedicated to l-tyrosine biosynthesis. The three TyrA subclasses are distinguished by their substrate specificities, namely the prephenate dehydrogenases, the arogenate dehydrogenases, and the cyclohexadienyl dehydrogenases, which utilize prephenate, l-arogenate, or both substrates, respectively. The molecular mechanism responsible for TyrA substrate selectivity and regulation is unknown. To further our understanding of TyrA-catalyzed reactions, we have determined the crystal structures of Aquifex aeolicus prephenate dehydrogenase bound with NAD(+) plus either 4-hydroxyphenylpyuvate, 4-hydroxyphenylpropionate, or l-tyrosine and have used these structures as guides to target active site residues for site-directed mutagenesis. From a combination of mutational and structural analyses, we have demonstrated that His-147 and Arg-250 are key catalytic and binding groups, respectively, and Ser-126 participates in both catalysis and substrate binding through the ligand 4-hydroxyl group. The crystal structure revealed that tyrosine, a known inhibitor, binds directly to the active site of the enzyme and not to an allosteric site. The most interesting finding though, is that mutating His-217 relieved the inhibitory effect of tyrosine on A. aeolicus prephenate dehydrogenase. The identification of a tyrosine-insensitive mutant provides a novel avenue for designing an unregulated enzyme for application in metabolic engineering. The crystal structure of Aquifex aeolicus prephenate dehydrogenase reveals the mode of tyrosine inhibition.,Sun W, Shahinas D, Bonvin J, Hou W, Kimber MS, Turnbull J, Christendat D J Biol Chem. 2009 May 8;284(19):13223-32. Epub 2009 Mar 10. PMID:19279014[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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