1ahx
From Proteopedia
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| - | [[Image:1ahx.gif|left|200px]] | + | [[Image:1ahx.gif|left|200px]] |
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| - | '''ASPARTATE AMINOTRANSFERASE HEXAMUTANT''' | + | {{Structure |
| + | |PDB= 1ahx |SIZE=350|CAPTION= <scene name='initialview01'>1ahx</scene>, resolution 2.0Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=PLP:PYRIDOXAL-5'-PHOSPHATE'>PLP</scene> and <scene name='pdbligand=HCI:HYDROCINNAMIC ACID'>HCI</scene> | ||
| + | |ACTIVITY= [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] | ||
| + | |GENE= | ||
| + | }} | ||
| + | |||
| + | '''ASPARTATE AMINOTRANSFERASE HEXAMUTANT''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1AHX is a [ | + | 1AHX is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1AHX OCA]. |
==Reference== | ==Reference== | ||
| - | 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:[http:// | + | 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:[http://www.ncbi.nlm.nih.gov/pubmed/7664122 7664122] |
[[Category: Aspartate transaminase]] | [[Category: Aspartate transaminase]] | ||
[[Category: Escherichia coli]] | [[Category: Escherichia coli]] | ||
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[[Category: transferase (aminotransferase)]] | [[Category: transferase (aminotransferase)]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 09:57:45 2008'' |
Revision as of 07:57, 20 March 2008
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| , resolution 2.0Å | |||||||
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| Ligands: | and | ||||||
| Activity: | Aspartate transaminase, with EC number 2.6.1.1 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
ASPARTATE AMINOTRANSFERASE HEXAMUTANT
Overview
Mutation 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.
About this Structure
1AHX is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.
Reference
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
Page seeded by OCA on Thu Mar 20 09:57:45 2008
