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Abendroth J, Choi R, Wall A, Clifton MC, Lukacs CM, Staker BL, Van Voorhis W, Myler P, Lorimer DD, Edwards TE. Structures of aspartate aminotransferases from Trypanosoma brucei, Leishmania major and Giardia lamblia. Acta Crystallogr F Struct Biol Commun 2015; 71:566-71. [PMID: 25945710 PMCID: PMC4427166 DOI: 10.1107/s2053230x15001831] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Accepted: 01/27/2015] [Indexed: 11/10/2022] Open
Abstract
The structures of three aspartate aminotransferases (AATs) from eukaryotic pathogens were solved within the Seattle Structural Genomics Center for Infectious Disease (SSGCID). Both the open and closed conformations of AAT were observed. Pyridoxal phosphate was bound to the active site via a Schiff base to a conserved lysine. An active-site mutant showed that Trypanosoma brucei AAT still binds pyridoxal phosphate even in the absence of the tethering lysine. The structures highlight the challenges for the structure-based design of inhibitors targeting the active site, while showing options for inhibitor design targeting the N-terminal arm.
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Affiliation(s)
- Jan Abendroth
- Seattle Structural Genomics Center for Infectious Disease, http://www.ssgcid.org, USA
- Beryllium Inc., 7869 NE Day Road West, Bainbridge Island, WA 98110, USA
| | - Ryan Choi
- Seattle Structural Genomics Center for Infectious Disease, http://www.ssgcid.org, USA
- Department of Medicine, Division of Allergy and Infectious Diseases, School of Medicine, University of Washington, Box 356423, Seattle, WA 98195, USA
| | - Abigail Wall
- Seattle Structural Genomics Center for Infectious Disease, http://www.ssgcid.org, USA
- Beryllium Inc., 7869 NE Day Road West, Bainbridge Island, WA 98110, USA
| | - Matthew C. Clifton
- Seattle Structural Genomics Center for Infectious Disease, http://www.ssgcid.org, USA
- Beryllium Inc., 7869 NE Day Road West, Bainbridge Island, WA 98110, USA
| | - Christine M. Lukacs
- Seattle Structural Genomics Center for Infectious Disease, http://www.ssgcid.org, USA
- Beryllium Inc., 7869 NE Day Road West, Bainbridge Island, WA 98110, USA
| | - Bart L. Staker
- Seattle Structural Genomics Center for Infectious Disease, http://www.ssgcid.org, USA
- Seattle BioMed, 307 Westlake Avenure North, Seattle, WA 98109, USA
| | - Wesley Van Voorhis
- Seattle Structural Genomics Center for Infectious Disease, http://www.ssgcid.org, USA
- Department of Medicine, Division of Allergy and Infectious Diseases, School of Medicine, University of Washington, Box 356423, Seattle, WA 98195, USA
| | - Peter Myler
- Seattle Structural Genomics Center for Infectious Disease, http://www.ssgcid.org, USA
- Seattle BioMed, 307 Westlake Avenure North, Seattle, WA 98109, USA
| | - Don D. Lorimer
- Seattle Structural Genomics Center for Infectious Disease, http://www.ssgcid.org, USA
- Beryllium Inc., 7869 NE Day Road West, Bainbridge Island, WA 98110, USA
| | - Thomas E. Edwards
- Seattle Structural Genomics Center for Infectious Disease, http://www.ssgcid.org, USA
- Beryllium Inc., 7869 NE Day Road West, Bainbridge Island, WA 98110, USA
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