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| | ==Crystal structural of mouse tyrosine aminotransferase== | | ==Crystal structural of mouse tyrosine aminotransferase== |
| - | <StructureSection load='3pdx' size='340' side='right' caption='[[3pdx]], [[Resolution|resolution]] 2.91Å' scene=''> | + | <StructureSection load='3pdx' size='340' side='right'caption='[[3pdx]], [[Resolution|resolution]] 2.91Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3pdx]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3PDX OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3PDX FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3pdx]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3PDX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3PDX FirstGlance]. <br> |
| - | </td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=LLP:2-LYSINE(3-HYDROXY-2-METHYL-5-PHOSPHONOOXYMETHYL-PYRIDIN-4-YLMETHANE)'>LLP</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.91Å</td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Tat ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 Mus musculus])</td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=LLP:(2S)-2-AMINO-6-[[3-HYDROXY-2-METHYL-5-(PHOSPHONOOXYMETHYL)PYRIDIN-4-YL]METHYLIDENEAMINO]HEXANOIC+ACID'>LLP</scene></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Tyrosine_transaminase Tyrosine transaminase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.6.1.5 2.6.1.5] </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=3pdx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3pdx OCA], [https://pdbe.org/3pdx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3pdx RCSB], [https://www.ebi.ac.uk/pdbsum/3pdx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3pdx ProSAT]</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=3pdx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3pdx OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3pdx RCSB], [http://www.ebi.ac.uk/pdbsum/3pdx PDBsum]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/ATTY_MOUSE ATTY_MOUSE]] Transaminase involved in tyrosine breakdown. Converts tyrosine to p-hydroxyphenylpyruvate. Can catalyze the reverse reaction, using glutamic acid, with 2-oxoglutarate as cosubstrate (in vitro). Has much lower affinity and transaminase activity for phenylalanine. | + | [https://www.uniprot.org/uniprot/ATTY_MOUSE ATTY_MOUSE] Transaminase involved in tyrosine breakdown. Converts tyrosine to p-hydroxyphenylpyruvate. Can catalyze the reverse reaction, using glutamic acid, with 2-oxoglutarate as cosubstrate (in vitro). Has much lower affinity and transaminase activity for phenylalanine. |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> |
| | </div> | | </div> |
| | + | <div class="pdbe-citations 3pdx" style="background-color:#fffaf0;"></div> |
| | + | |
| | + | ==See Also== |
| | + | *[[Aminotransferase 3D structures|Aminotransferase 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| | + | [[Category: Large Structures]] |
| | [[Category: Mus musculus]] | | [[Category: Mus musculus]] |
| - | [[Category: Tyrosine transaminase]]
| + | [[Category: Bevan DR]] |
| - | [[Category: Bevan, D R]] | + | [[Category: Han Q]] |
| - | [[Category: Han, Q]] | + | [[Category: Lemkul JA]] |
| - | [[Category: Lemkul, J A]] | + | [[Category: Li J]] |
| - | [[Category: Li, J]] | + | [[Category: Mehere PV]] |
| - | [[Category: Mehere, P V]] | + | [[Category: Robinson H]] |
| - | [[Category: Robinson, H]] | + | |
| - | [[Category: Alpha/bata protein]]
| + | |
| - | [[Category: Aminotransferase]]
| + | |
| - | [[Category: Plp-binding]]
| + | |
| - | [[Category: Transferase]]
| + | |
| Structural highlights
Function
ATTY_MOUSE Transaminase involved in tyrosine breakdown. Converts tyrosine to p-hydroxyphenylpyruvate. Can catalyze the reverse reaction, using glutamic acid, with 2-oxoglutarate as cosubstrate (in vitro). Has much lower affinity and transaminase activity for phenylalanine.
Publication Abstract from PubMed
Tyrosine aminotransferase (TAT) catalyzes the transamination of tyrosine and other aromatic amino acids. The enzyme is thought to play a role in tyrosinemia type II, hepatitis and hepatic carcinoma recovery. The objective of this study is to investigate its biochemical and structural characteristics and substrate specificity in order to provide insight regarding its involvement in these diseases. Mouse TAT (mTAT) was cloned from a mouse cDNA library, and its recombinant protein was produced using Escherichia coli cells and purified using various chromatographic techniques. The recombinant mTAT is able to catalyze the transamination of tyrosine using alpha-ketoglutaric acid as an amino group acceptor at neutral pH. The enzyme also can use glutamate and phenylalanine as amino group donors and p-hydroxy-phenylpyruvate, phenylpyruvate and alpha-ketocaproic acid as amino group acceptors. Through macromolecular crystallography we have determined the mTAT crystal structure at 2.9 A resolution. The crystal structure revealed the interaction between the pyridoxal-5'-phosphate cofactor and the enzyme, as well as the formation of a disulphide bond. The detection of disulphide bond provides some rational explanation regarding previously observed TAT inactivation under oxidative conditions and reactivation of the inactive TAT in the presence of a reducing agent. Molecular dynamics simulations using the crystal structures of Trypanosoma cruzi TAT and human TAT provided further insight regarding the substrate-enzyme interactions and substrate specificity. The biochemical and structural properties of TAT and the binding of its cofactor and the substrate may help in elucidation of the mechanism of TAT inhibition and activation.
Tyrosine aminotransferase: biochemical and structural properties and molecular dynamics simulations.,Mehere P, Han Q, Lemkul JA, Vavricka CJ, Robinson H, Bevan DR, Li J Protein Cell. 2010 Nov;1(11):1023-32. Epub 2010 Dec 10. PMID:21153519[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Mehere P, Han Q, Lemkul JA, Vavricka CJ, Robinson H, Bevan DR, Li J. Tyrosine aminotransferase: biochemical and structural properties and molecular dynamics simulations. Protein Cell. 2010 Nov;1(11):1023-32. Epub 2010 Dec 10. PMID:21153519 doi:10.1007/s13238-010-0128-5
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