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Knipp M, Charnock JM, Garner CD, Vasák M. Structural and functional characterization of the Zn(II) site in dimethylargininase-1 (DDAH-1) from bovine brain. Zn(II) release activates DDAH-1. J Biol Chem 2001; 276:40449-56. [PMID: 11546769 DOI: 10.1074/jbc.m104056200] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
L-N(omega),N(omega)-dimethylarginine dimethylaminohydrolase-1 (DDAH-1) is a Zn(II)-containing enzyme that, through hydrolysis of side-chain methylated l-arginines, regulates the activity of nitric-oxide synthase. Herein we report the structural and functional properties of the Zn(II)-binding site in DDAH-1 from bovine brain. Activity measurements of the native and metal-free enzyme have revealed that the endogenously bound Zn(II) inhibits the enzyme. Native DDAH-1 could be fully or partially activated using various concentrations of phosphate, imidazole, histidine, and histamine, a process that is paralleled by the release of Zn(II). The slow activation of the enzyme by the bulky complexing agents EDTA and 1,10-phenantroline suggests that the Zn(II)-binding site is partially buried in the protein structure. The apparent Zn(II)-dissociation constant of 4.2 nm, determined by 19F NMR using the chelator 5F-BAPTA (1,2-bis(2-amino-5-fluorophenoxy)ethane-N,N,N',N'-tetraacetic acid), lies in the range of intracellular free Zn(II) concentrations. These results suggest a regulatory role for the Zn(II)-binding site. The coordination environment of the Zn(II) in DDAH-1 has been examined by Zn K-edge x-ray absorption spectroscopy. The extended x-ray absorption fine structure observed is consistent with Zn(II) being coordinated by 2 S and 2 N (or O) atoms. The biological implications of these findings are discussed.
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Affiliation(s)
- M Knipp
- Institute of Biochemistry, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
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Sakane H, Muñoz-Páez A, Díaz-Moreno S, Martínez JM, Pappalardo RR, Sánchez Marcos E. Second Hydration Shell Single Scattering versus First Hydration Shell Multiple Scattering in M(H2O)63+ EXAFS Spectra. J Am Chem Soc 1998. [DOI: 10.1021/ja974142d] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hideto Sakane
- Contribution from the Department of Applied Chemistry and Biotechnology, Faculty of Engineering, Yamanashi University, 4-3-11 Takeda Kofu, Yamanashi 400-8511, Japan, Instituto de Ciencia de Materiales, Departamento de Química Inorgánica CSIC, Universidad de Sevilla, c/ Americo Vespucio s/n, 41092 Sevilla, Spain, and Departamento de Química Física, Universidad de Sevilla, 41012 Sevilla, Spain
| | - Adela Muñoz-Páez
- Contribution from the Department of Applied Chemistry and Biotechnology, Faculty of Engineering, Yamanashi University, 4-3-11 Takeda Kofu, Yamanashi 400-8511, Japan, Instituto de Ciencia de Materiales, Departamento de Química Inorgánica CSIC, Universidad de Sevilla, c/ Americo Vespucio s/n, 41092 Sevilla, Spain, and Departamento de Química Física, Universidad de Sevilla, 41012 Sevilla, Spain
| | - Sofía Díaz-Moreno
- Contribution from the Department of Applied Chemistry and Biotechnology, Faculty of Engineering, Yamanashi University, 4-3-11 Takeda Kofu, Yamanashi 400-8511, Japan, Instituto de Ciencia de Materiales, Departamento de Química Inorgánica CSIC, Universidad de Sevilla, c/ Americo Vespucio s/n, 41092 Sevilla, Spain, and Departamento de Química Física, Universidad de Sevilla, 41012 Sevilla, Spain
| | - José M. Martínez
- Contribution from the Department of Applied Chemistry and Biotechnology, Faculty of Engineering, Yamanashi University, 4-3-11 Takeda Kofu, Yamanashi 400-8511, Japan, Instituto de Ciencia de Materiales, Departamento de Química Inorgánica CSIC, Universidad de Sevilla, c/ Americo Vespucio s/n, 41092 Sevilla, Spain, and Departamento de Química Física, Universidad de Sevilla, 41012 Sevilla, Spain
| | - Rafael R. Pappalardo
- Contribution from the Department of Applied Chemistry and Biotechnology, Faculty of Engineering, Yamanashi University, 4-3-11 Takeda Kofu, Yamanashi 400-8511, Japan, Instituto de Ciencia de Materiales, Departamento de Química Inorgánica CSIC, Universidad de Sevilla, c/ Americo Vespucio s/n, 41092 Sevilla, Spain, and Departamento de Química Física, Universidad de Sevilla, 41012 Sevilla, Spain
| | - Enrique Sánchez Marcos
- Contribution from the Department of Applied Chemistry and Biotechnology, Faculty of Engineering, Yamanashi University, 4-3-11 Takeda Kofu, Yamanashi 400-8511, Japan, Instituto de Ciencia de Materiales, Departamento de Química Inorgánica CSIC, Universidad de Sevilla, c/ Americo Vespucio s/n, 41092 Sevilla, Spain, and Departamento de Química Física, Universidad de Sevilla, 41012 Sevilla, Spain
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Díaz-Moreno S, Muñoz-Páez A, Martínez JM, Pappalardo RR, Marcos ES. EXAFS Investigation of Inner- and Outer-Sphere Chloroaquo Complexes of Cr3+ in Aqueous Solutions. J Am Chem Soc 1996. [DOI: 10.1021/ja9608149] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sofía Díaz-Moreno
- Contribution from the Departamento de Química Inorgánica, Universidad de Sevilla, ICMSE-CSIC, P. O. Box 553, 41012-Sevilla, Spain, and Departamento de Química Física, Universidad de Sevilla, 41012-Sevilla, Spain
| | - Adela Muñoz-Páez
- Contribution from the Departamento de Química Inorgánica, Universidad de Sevilla, ICMSE-CSIC, P. O. Box 553, 41012-Sevilla, Spain, and Departamento de Química Física, Universidad de Sevilla, 41012-Sevilla, Spain
| | - José M. Martínez
- Contribution from the Departamento de Química Inorgánica, Universidad de Sevilla, ICMSE-CSIC, P. O. Box 553, 41012-Sevilla, Spain, and Departamento de Química Física, Universidad de Sevilla, 41012-Sevilla, Spain
| | - Rafael R. Pappalardo
- Contribution from the Departamento de Química Inorgánica, Universidad de Sevilla, ICMSE-CSIC, P. O. Box 553, 41012-Sevilla, Spain, and Departamento de Química Física, Universidad de Sevilla, 41012-Sevilla, Spain
| | - Enrique Sánchez Marcos
- Contribution from the Departamento de Química Inorgánica, Universidad de Sevilla, ICMSE-CSIC, P. O. Box 553, 41012-Sevilla, Spain, and Departamento de Química Física, Universidad de Sevilla, 41012-Sevilla, Spain
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