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==ASPARTATE AMINOTRANSFERASE HEXAMUTANT== | ==ASPARTATE AMINOTRANSFERASE HEXAMUTANT== | ||
<StructureSection load='1ahe' size='340' side='right' caption='[[1ahe]], [[Resolution|resolution]] 2.30Å' scene=''> | <StructureSection load='1ahe' size='340' side='right' caption='[[1ahe]], [[Resolution|resolution]] 2.30Å' scene=''> | ||
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=PLP:PYRIDOXAL-5-PHOSPHATE'>PLP</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=PLP:PYRIDOXAL-5-PHOSPHATE'>PLP</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> | ||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Aspartate_transaminase Aspartate transaminase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.6.1.1 2.6.1.1] </span></td></tr> | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Aspartate_transaminase Aspartate transaminase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.6.1.1 2.6.1.1] </span></td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1ahe FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ahe OCA], [http://pdbe.org/1ahe PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1ahe RCSB], [http://www.ebi.ac.uk/pdbsum/1ahe PDBsum]</span></td></tr> | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1ahe FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ahe OCA], [http://pdbe.org/1ahe PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1ahe RCSB], [http://www.ebi.ac.uk/pdbsum/1ahe PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1ahe ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
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</div> | </div> | ||
<div class="pdbe-citations 1ahe" style="background-color:#fffaf0;"></div> | <div class="pdbe-citations 1ahe" style="background-color:#fffaf0;"></div> | ||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 13:42, 15 November 2017
ASPARTATE AMINOTRANSFERASE HEXAMUTANTASPARTATE AMINOTRANSFERASE HEXAMUTANT
Structural highlights
Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedMutation of six residues of Escherichia coli aspartate aminotransferase results in substantial acquisition of the transamination properties of tyrosine amino-transferase without loss of aspartate transaminase activity. X-ray crystallographic analysis of key inhibitor complexes of the hexamutant reveals the structural basis for this substrate selectivity. It appears that tyrosine aminotransferase achieves nearly equal affinities for a wide range of amino acids by an unusual conformational switch. An active-site arginine residue either shifts its position to electrostatically interact with charged substrates or moves aside to allow access of aromatic ligands. Alternating arginine-modulated substrate specificity in an engineered tyrosine aminotransferase.,Malashkevich VN, Onuffer JJ, Kirsch JF, Jansonius JN Nat Struct Biol. 1995 Jul;2(7):548-53. PMID:7664122[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References |
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