|
2
|
Renata H, Lewis RD, Sweredoski MJ, Moradian A, Hess S, Wang ZJ, Arnold FH. Identification of Mechanism-Based Inactivation in P450-Catalyzed Cyclopropanation Facilitates Engineering of Improved Enzymes. J Am Chem Soc 2016; 138:12527-33. [PMID: 27573353 DOI: 10.1021/jacs.6b06823] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Following the recent discovery that heme proteins can catalyze the cyclopropanation of styrenyl olefins with high efficiency and selectivity, interest in developing new enzymes for a variety of non-natural carbene transfer reactions has burgeoned. The fact that diazo compounds and other carbene precursors are known mechanism-based inhibitors of P450s, however, led us to investigate if they also interfere with this new enzyme function. We present evidence for two inactivation pathways that are operative during cytochrome P450-catalyzed cyclopropanation. Using a combination of UV-vis, mass spectrometry, and proteomic analyses, we show that the heme cofactor and several nucleophilic side chains undergo covalent modification by ethyl diazoacetate (EDA). Substitution of two of the affected residues with less-nucleophilic amino acids led to a more than twofold improvement in cyclopropanation performance (total TTN). Elucidating the inactivation pathways of heme protein-based carbene transfer catalysts should aid in the optimization of this new biocatalytic function.
Collapse
Affiliation(s)
- Hans Renata
- Division of Chemistry and Chemical Engineering, MC 210-41, and ‡Proteome Exploration Laboratory, Division of Biology and Biological Engineering, Beckman Institute, MC 139-74, California Institute of Technology , 1200 E California Blvd, Pasadena, California 91125, United States
| | - Russell D Lewis
- Division of Chemistry and Chemical Engineering, MC 210-41, and ‡Proteome Exploration Laboratory, Division of Biology and Biological Engineering, Beckman Institute, MC 139-74, California Institute of Technology , 1200 E California Blvd, Pasadena, California 91125, United States
| | - Michael J Sweredoski
- Division of Chemistry and Chemical Engineering, MC 210-41, and ‡Proteome Exploration Laboratory, Division of Biology and Biological Engineering, Beckman Institute, MC 139-74, California Institute of Technology , 1200 E California Blvd, Pasadena, California 91125, United States
| | - Annie Moradian
- Division of Chemistry and Chemical Engineering, MC 210-41, and ‡Proteome Exploration Laboratory, Division of Biology and Biological Engineering, Beckman Institute, MC 139-74, California Institute of Technology , 1200 E California Blvd, Pasadena, California 91125, United States
| | - Sonja Hess
- Division of Chemistry and Chemical Engineering, MC 210-41, and ‡Proteome Exploration Laboratory, Division of Biology and Biological Engineering, Beckman Institute, MC 139-74, California Institute of Technology , 1200 E California Blvd, Pasadena, California 91125, United States
| | - Z Jane Wang
- Division of Chemistry and Chemical Engineering, MC 210-41, and ‡Proteome Exploration Laboratory, Division of Biology and Biological Engineering, Beckman Institute, MC 139-74, California Institute of Technology , 1200 E California Blvd, Pasadena, California 91125, United States
| | - Frances H Arnold
- Division of Chemistry and Chemical Engineering, MC 210-41, and ‡Proteome Exploration Laboratory, Division of Biology and Biological Engineering, Beckman Institute, MC 139-74, California Institute of Technology , 1200 E California Blvd, Pasadena, California 91125, United States
| |
Collapse
|
|
7
|
Setsune JI, Ito S, Takeda H, Ishimaru Y, Kitao T, Sato M, Ohya-Nishiguchi H. Reversible Complexation of Acetylene with (Perchlorato)cobalt(III) Porphyrins To Form a Novel Dicobalt(II) Bis(porphyrin) with a Vinylene-N,N‘ Linkage. Organometallics 1997. [DOI: 10.1021/om960339n] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jun-ichiro Setsune
- Department of Chemistry, Faculty of Science, Kobe University, Nada, Kobe 657, Japan, Coordination Chemistry Laboratory, Institute for Molecular Science, Myodaiji, Okazaki 444, Japan, Department of Applied Chemistry, College of Engineering, and Department of Chemistry, Faculty of Integrated Arts and Sciences, University of Osaka Prefecture, Sakai, Osaka 591, Japan, and Department of Chemistry, Faculty of Science, Kyoto University, Sakyo, Kyoto 606, Japan
| | - Shoji Ito
- Department of Chemistry, Faculty of Science, Kobe University, Nada, Kobe 657, Japan, Coordination Chemistry Laboratory, Institute for Molecular Science, Myodaiji, Okazaki 444, Japan, Department of Applied Chemistry, College of Engineering, and Department of Chemistry, Faculty of Integrated Arts and Sciences, University of Osaka Prefecture, Sakai, Osaka 591, Japan, and Department of Chemistry, Faculty of Science, Kyoto University, Sakyo, Kyoto 606, Japan
| | - Hirokazu Takeda
- Department of Chemistry, Faculty of Science, Kobe University, Nada, Kobe 657, Japan, Coordination Chemistry Laboratory, Institute for Molecular Science, Myodaiji, Okazaki 444, Japan, Department of Applied Chemistry, College of Engineering, and Department of Chemistry, Faculty of Integrated Arts and Sciences, University of Osaka Prefecture, Sakai, Osaka 591, Japan, and Department of Chemistry, Faculty of Science, Kyoto University, Sakyo, Kyoto 606, Japan
| | - Yoshihiro Ishimaru
- Department of Chemistry, Faculty of Science, Kobe University, Nada, Kobe 657, Japan, Coordination Chemistry Laboratory, Institute for Molecular Science, Myodaiji, Okazaki 444, Japan, Department of Applied Chemistry, College of Engineering, and Department of Chemistry, Faculty of Integrated Arts and Sciences, University of Osaka Prefecture, Sakai, Osaka 591, Japan, and Department of Chemistry, Faculty of Science, Kyoto University, Sakyo, Kyoto 606, Japan
| | - Teijiro Kitao
- Department of Chemistry, Faculty of Science, Kobe University, Nada, Kobe 657, Japan, Coordination Chemistry Laboratory, Institute for Molecular Science, Myodaiji, Okazaki 444, Japan, Department of Applied Chemistry, College of Engineering, and Department of Chemistry, Faculty of Integrated Arts and Sciences, University of Osaka Prefecture, Sakai, Osaka 591, Japan, and Department of Chemistry, Faculty of Science, Kyoto University, Sakyo, Kyoto 606, Japan
| | - Masaaki Sato
- Department of Chemistry, Faculty of Science, Kobe University, Nada, Kobe 657, Japan, Coordination Chemistry Laboratory, Institute for Molecular Science, Myodaiji, Okazaki 444, Japan, Department of Applied Chemistry, College of Engineering, and Department of Chemistry, Faculty of Integrated Arts and Sciences, University of Osaka Prefecture, Sakai, Osaka 591, Japan, and Department of Chemistry, Faculty of Science, Kyoto University, Sakyo, Kyoto 606, Japan
| | - Hiroaki Ohya-Nishiguchi
- Department of Chemistry, Faculty of Science, Kobe University, Nada, Kobe 657, Japan, Coordination Chemistry Laboratory, Institute for Molecular Science, Myodaiji, Okazaki 444, Japan, Department of Applied Chemistry, College of Engineering, and Department of Chemistry, Faculty of Integrated Arts and Sciences, University of Osaka Prefecture, Sakai, Osaka 591, Japan, and Department of Chemistry, Faculty of Science, Kyoto University, Sakyo, Kyoto 606, Japan
| |
Collapse
|