1GUH
Structure determination and refinement of human alpha class glutathione transferase A1-1, and a comparison with the MU and PI class enzymes
Summary for 1GUH
Entry DOI | 10.2210/pdb1guh/pdb |
Descriptor | GLUTATHIONE S-TRANSFERASE A1-1, S-BENZYL-GLUTATHIONE (2 entities in total) |
Functional Keywords | glutathione transferase, transferase |
Biological source | Homo sapiens (human) |
Cellular location | Cytoplasm: P08263 |
Total number of polymer chains | 4 |
Total formula weight | 103745.48 |
Authors | Sinning, I.,Kleywegt, G.J.,Jones, T.A. (deposition date: 1993-02-24, release date: 1993-10-31, Last modification date: 2024-02-07) |
Primary citation | Sinning, I.,Kleywegt, G.J.,Cowan, S.W.,Reinemer, P.,Dirr, H.W.,Huber, R.,Gilliland, G.L.,Armstrong, R.N.,Ji, X.,Board, P.G.,Olin, B.,Mannervik, B.,Jones, T.A. Structure determination and refinement of human alpha class glutathione transferase A1-1, and a comparison with the Mu and Pi class enzymes. J.Mol.Biol., 232:192-212, 1993 Cited by PubMed Abstract: The crystal structure of human alpha class glutathione transferase A1-1 has been determined and refined to a resolution of 2.6 A. There are two copies of the dimeric enzyme in the asymmetric unit. Each monomer is built from two domains. A bound inhibitor, S-benzyl-glutathione, is primarily associated with one of these domains via a network of hydrogen bonds and salt-links. In particular, the sulphur atom of the inhibitor forms a hydrogen bond to the hydroxyl group of Tyr9 and the guanido group of Arg15. The benzyl group of the inhibitor is completely buried in a hydrophobic pocket. The structure shows an overall similarity to the mu and pi class enzymes particularly in the glutathione-binding domain". The main difference concerns the extended C terminus of the alpha class enzyme which forms an extra alpha-helix that blocks one entrance to the active site and makes up part of the substrate binding site. PubMed: 8331657DOI: 10.1006/jmbi.1993.1376 PDB entries with the same primary citation |
Experimental method | X-RAY DIFFRACTION (2.6 Å) |
Structure validation
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