1u88
From Proteopedia
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| - | [[Image:1u88.gif|left|200px]] | + | [[Image:1u88.gif|left|200px]] |
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| - | '''Crystal Structure Of The 26 Kda Glutathione S-Transferase Y7F mutant From Schistosoma Japonicum Complexed With S-Octyl Glutathione''' | + | {{Structure |
| + | |PDB= 1u88 |SIZE=350|CAPTION= <scene name='initialview01'>1u88</scene>, resolution 3.50Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=GTY:L-GAMMA-GLUTAMYL-S-OCTYL-D-CYSTEINYLGLYCINE'>GTY</scene> | ||
| + | |ACTIVITY= [http://en.wikipedia.org/wiki/Glutathione_transferase Glutathione transferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.5.1.18 2.5.1.18] | ||
| + | |GENE= | ||
| + | }} | ||
| + | |||
| + | '''Crystal Structure Of The 26 Kda Glutathione S-Transferase Y7F mutant From Schistosoma Japonicum Complexed With S-Octyl Glutathione''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1U88 is a [ | + | 1U88 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Schistosoma_japonicum Schistosoma japonicum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1U88 OCA]. |
==Reference== | ==Reference== | ||
| - | Crystallographic and thermodynamic analysis of the binding of S-octylglutathione to the Tyr 7 to Phe mutant of glutathione S-transferase from Schistosoma japonicum., Andujar-Sanchez M, Smith AW, Clemente-Jimenez JM, Rodriguez-Vico F, Las Heras-Vazquez FJ, Jara-Perez V, Camara-Artigas A, Biochemistry. 2005 Feb 1;44(4):1174-83. PMID:[http:// | + | Crystallographic and thermodynamic analysis of the binding of S-octylglutathione to the Tyr 7 to Phe mutant of glutathione S-transferase from Schistosoma japonicum., Andujar-Sanchez M, Smith AW, Clemente-Jimenez JM, Rodriguez-Vico F, Las Heras-Vazquez FJ, Jara-Perez V, Camara-Artigas A, Biochemistry. 2005 Feb 1;44(4):1174-83. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15667211 15667211] |
[[Category: Glutathione transferase]] | [[Category: Glutathione transferase]] | ||
[[Category: Schistosoma japonicum]] | [[Category: Schistosoma japonicum]] | ||
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[[Category: transferase]] | [[Category: transferase]] | ||
| - | ''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 14:28:32 2008'' |
Revision as of 12:28, 20 March 2008
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| , resolution 3.50Å | |||||||
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| Ligands: | |||||||
| Activity: | Glutathione transferase, with EC number 2.5.1.18 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal Structure Of The 26 Kda Glutathione S-Transferase Y7F mutant From Schistosoma Japonicum Complexed With S-Octyl Glutathione
Overview
Glutathione S-transferases are a family of multifunctional enzymes involved in the metabolism of drugs and xenobiotics. Two tyrosine residues, Tyr 7 and Tyr 111, in the active site of the enzyme play an important role in the binding and catalysis of substrate ligands. The crystal structures of Schistosoma japonicum glutathione S-transferase tyrosine 7 to phenylalanine mutant [SjGST(Y7F)] in complex with the substrate glutathione (GSH) and the competitive inhibitor S-octylglutathione (S-octyl-GSH) have been obtained. These new structural data combined with fluorescence spectroscopy and thermodynamic data, obtained by means of isothermal titration calorimetry, allow for detailed characterization of the ligand-binding process. The binding of S-octyl-GSH to SjGST(Y7F) is enthalpically and entropically driven at temperatures below 30 degrees C. The stoichiometry of the binding is one molecule of S-octyl-GSH per mutant dimer, whereas shorter alkyl derivatives bind with a stoichiometry of two molecules per mutant dimer. The SjGST(Y7F).GSH structure showed no major structural differences compared to the wild-type enzyme. In contrast, the structure of SjGST(Y7F).S-octyl-GSH showed asymmetric binding of S-octyl-GSH. This lack of symmetry is reflected in the lower symmetry space group of the SjGST(Y7F).S-octyl-GSH crystals (P6(3)) compared to that of the SjGST(Y7F).GSH crystals (P6(3)22). Moreover, the binding of S-octyl-GSH to the A subunit is accompanied by conformational changes that may be responsible for the lack of binding to the B subunit.
About this Structure
1U88 is a Single protein structure of sequence from Schistosoma japonicum. Full crystallographic information is available from OCA.
Reference
Crystallographic and thermodynamic analysis of the binding of S-octylglutathione to the Tyr 7 to Phe mutant of glutathione S-transferase from Schistosoma japonicum., Andujar-Sanchez M, Smith AW, Clemente-Jimenez JM, Rodriguez-Vico F, Las Heras-Vazquez FJ, Jara-Perez V, Camara-Artigas A, Biochemistry. 2005 Feb 1;44(4):1174-83. PMID:15667211
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