1
|
Harland JB, LaLonde AB, Thomas DJ, Castella DG, Kampf JW, Zeller M, Alp EE, Hu MY, Zhao J, Lehnert N. Vibrational properties of heme-nitrosoalkane complexes in comparison with those of their HNO analogs, and reactivity studies towards nitric oxide and Lewis acids. Dalton Trans 2024. [PMID: 39093017 DOI: 10.1039/d4dt01632g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/04/2024]
Abstract
C-Nitroso compounds (RNO, R = alkyl and aryl) are byproducts of drug metabolism and bind to heme proteins, and their heme-RNO adducts are isoelectronic to ferrous nitroxyl (NO-/HNO) complexes. Importantly, heme-HNO compounds are key intermediates in the reduction of NO to N2O and nitrite to ammonium in the nitrogen cycle. Ferrous heme-RNO complexes act as stable analogs of these species, potentially allowing for the investigation of the vibrational and electronic properties of unstable heme-HNO intermediates. In this paper, a series of six-coordinate ferrous heme-RNO complexes (where R = iPr and Ph) were prepared using the TPP2- and 3,5-Me-BAFP2- co-ligands, and tetrahydrofuran, pyridine, and 1-methylimidazole as the axial ligands (bound trans to RNO). These complexes were characterized using different spectroscopic methods and X-ray crystallography. The complex [Fe(TPP)(THF)(iPrNO)] was further utilized for nuclear resonance vibrational spectroscopy (NRVS), allowing for the detailed assignment of the Fe-N(R)O vibrations of a heme-RNO complex for the first time. The vibrational properties of these species were then correlated with those of their HNO analogs, using DFT calculations. Our studies support previous findings that RNO ligands in ferrous heme complexes do not elicit a significant trans effect. In addition, the complexes are air-stable, and do not show any reactivity of their RNO ligands towards NO. So although ferrous heme-RNO complexes are suitable structural and electronic models for their HNO analogs, they are unsuitable to model the reactivity of heme-HNO complexes. We further investigated the reaction of our heme-RNO complexes with different Lewis acids. Here, [Fe(TPP)(THF)(iPrNO)] was found to be unreactive towards Lewis acids. In contrast, [Fe(3,5-Me-BAFP)(iPrNO)2] is reactive towards all of the Lewis acids investigated here, but in most cases the iron center is simply oxidized, resulting in the loss of the iPrNO ligand. In the case of the Lewis acid B2(pin)2, the reduced product [Fe(3,5-Me-BAFP)(iPrNH2)(iPrNO)] was identified by X-ray crystallography.
Collapse
Affiliation(s)
- Jill B Harland
- Department of Chemistry and Department of Biophysics, University of Michigan, Ann Arbor, MI 48109, USA.
| | - Ashley B LaLonde
- Department of Chemistry and Department of Biophysics, University of Michigan, Ann Arbor, MI 48109, USA.
| | - Diamond J Thomas
- Department of Chemistry and Department of Biophysics, University of Michigan, Ann Arbor, MI 48109, USA.
| | - Daniel G Castella
- Department of Chemistry and Department of Biophysics, University of Michigan, Ann Arbor, MI 48109, USA.
| | - Jeff W Kampf
- Department of Chemistry and Department of Biophysics, University of Michigan, Ann Arbor, MI 48109, USA.
| | - Matthias Zeller
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, USA
| | - E Ercan Alp
- Advanced Photon Source, Argonne National Laboratory, Illinois 60439, USA
| | - Michael Y Hu
- Advanced Photon Source, Argonne National Laboratory, Illinois 60439, USA
| | - Jiyong Zhao
- Advanced Photon Source, Argonne National Laboratory, Illinois 60439, USA
| | - Nicolai Lehnert
- Department of Chemistry and Department of Biophysics, University of Michigan, Ann Arbor, MI 48109, USA.
| |
Collapse
|
2
|
Londoño-Salazar J, Ayala M, Powell DR, Shao Y, Richter-Addo GB. Interactions of arylhydroxylamines and alkylaldoximes with a rhodium porphyrin. J Inorg Biochem 2023; 247:112337. [PMID: 37517330 DOI: 10.1016/j.jinorgbio.2023.112337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 07/16/2023] [Accepted: 07/19/2023] [Indexed: 08/01/2023]
Abstract
Heme enzymes are involved in the binding and metabolism of hydroxylamine (RNHOH) and aldoxime (RCH=NOH) compounds (R = H, alkyl, aryl). We report the synthesis and X-ray crystal structure of a metalloporphyrin in complex with an arylhydroxylamine, namely that of (TPP)Rh(PhNHOH)(C6H4Cl) (TPP = tetraphenylpophryinato dianion). The crystal structure reveals, in addition to N-binding of PhNHOH to Rh, the presence of an intramolecular H-bond between the hydroxylamine -OH proton and a porphyrin N-atom. Results from density functional theory (DFT) calculations support the presence of this intramolecular H-bond in this global minimum structure, and a natural bond order (NBO) analysis reveals that this H-bond comprises a donor π N=C (porphyrin) to acceptor σ* O-H (hydroxylamine) interaction of 2.32 kcal/mol. While DFT calculations predict the presence of similar intramolecular H-bond interactions in the related aldoxime complexes (TPP)Rh(RCH=NOH)(C6H4Cl) in their global minima structures, the X-ray crystal structure obtained for the (TPP)Rh(CH3(CH2)2CH=NOH)(C6H4Cl) complex is consistent with the local (non-global) minima conformation that does not have this intramolecular H-bond interaction.
Collapse
Affiliation(s)
| | - Megan Ayala
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019, USA
| | - Douglas R Powell
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019, USA
| | - Yihan Shao
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019, USA.
| | - George B Richter-Addo
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019, USA.
| |
Collapse
|
3
|
Interactions of N-hydroxyamphetamine with an iron porphyrin: A unique intramolecular H-bond probed by DFT calculations. J Inorg Biochem 2022; 231:111779. [DOI: 10.1016/j.jinorgbio.2022.111779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 02/03/2022] [Accepted: 02/22/2022] [Indexed: 11/18/2022]
|
4
|
Xu S, Yang D, Wang B, Chen Y, Ye S, Qu J. Generation of a Sulfinamide Species from Facile N-O Bond Cleavage of Nitrosobenzene by a Thiolate-Bridged Diiron Complex. J Am Chem Soc 2021; 143:17374-17387. [PMID: 34617736 DOI: 10.1021/jacs.1c03542] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The activation of nitrosobenzene promoted by transition-metal complexes has gained considerable interest due to its significance for understanding biological processes and catalytic C-N bond formation processes. Despite intensive studies in the past decades, there are only limited cases where electron-rich metal centers were commonly employed to achieve the N-O or C-N bond cleavage of the coordinated nitrosobenzene. In this regard, it is significant and challenging to construct a suitable functional system for examining its unique reactivity toward reductive activation of nitrosoarene. Herein, we present a {Fe2S2} functional platform that can activate nitrosobenzene via an unprecedented iron-directed thiolate insertion into the N-O bond to selectively generate a well-defined diiron benzenesulfinamide complex. Furthermore, computational studies support a proposal that in this concerted four-electron reduction process of nitrosobenzene the iron center serves as an important electron shuttle. Notably, compared to the intact bridging nitrosoarene ligand, the benzenesulfinamide moiety has priority to convert into aniline in the presence of separate or combined protons and reductants, which may imply the formation of the sulfinamide species accelerates reduction process of nitrosoarene. The reaction pattern presented here represents a novel activation mode of nitrosobenzene realized by a thiolate-bridged diiron complex.
Collapse
Affiliation(s)
- Sunlin Xu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P.R. China
| | - Dawei Yang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P.R. China
| | - Baomin Wang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P.R. China
| | - Yifeng Chen
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Centre for Biomanufacturing, Frontiers Science Center for Materiobiology and Dynamic Chemistry, East China University of Science and Technology, Shanghai 200237, P.R. China.,School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China
| | - Shengfa Ye
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P.R. China
| | - Jingping Qu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P.R. China.,State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Centre for Biomanufacturing, Frontiers Science Center for Materiobiology and Dynamic Chemistry, East China University of Science and Technology, Shanghai 200237, P.R. China
| |
Collapse
|
5
|
Mirzaei MS, Ivanov MV, Taherpour AA, Mirzaei S. Mechanism-Based Inactivation of Cytochrome P450 Enzymes: Computational Insights. Chem Res Toxicol 2021; 34:959-987. [PMID: 33769041 DOI: 10.1021/acs.chemrestox.0c00483] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Mechanism-based inactivation (MBI) refers to the metabolic bioactivation of a xenobiotic by cytochrome P450s to a highly reactive intermediate which subsequently binds to the enzyme and leads to the quasi-irreversible or irreversible inhibition. Xenobiotics, mainly drugs with specific functional units, are the major sources of MBI. Two possible consequences of MBI by medicinal compounds are drug-drug interaction and severe toxicity that are observed and highlighted by clinical experiments. Today almost all of these latent functional groups (e.g., thiophene, furan, alkylamines, etc.) are known, and their features and mechanisms of action, owing to the vast experimental and theoretical studies, are determined. In the past decade, molecular modeling techniques, mostly density functional theory, have revealed the most feasible mechanism that a drug undergoes by P450 enzymes to generate a highly reactive intermediate. In this review, we provide a comprehensive and detailed picture of computational advances toward the elucidation of the activation mechanisms of various known groups with MBI activity. To this aim, we briefly describe the computational concepts to carry out and analyze the mechanistic investigations, and then, we summarize the studies on compounds with known inhibition activity including thiophene, furan, alkylamines, terminal acetylene, etc. This study can be reference literature for both theoretical and experimental (bio)chemists in several different fields including rational drug design, the process of toxicity prevention, and the discovery of novel inhibitors and catalysts.
Collapse
Affiliation(s)
- M Saeed Mirzaei
- Department of Organic Chemistry, Faculty of Chemistry, Razi University, Kermanshah, Iran 67149-67346
| | - Maxim V Ivanov
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Avat Arman Taherpour
- Department of Organic Chemistry, Faculty of Chemistry, Razi University, Kermanshah, Iran 67149-67346.,Medical Biology Research Centre, University of Medical Sciences, Kermanshah, Iran 67149-67346
| | - Saber Mirzaei
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| |
Collapse
|
6
|
Abucayon EG, Chu JM, Ayala M, Khade RL, Zhang Y, Richter-Addo GB. Insight into the preferential N-binding versus O-binding of nitrosoarenes to ferrous and ferric heme centers. Dalton Trans 2021; 50:3487-3498. [PMID: 33634802 PMCID: PMC8061117 DOI: 10.1039/d0dt03604h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nitrosoarenes (ArNOs) are toxic metabolic intermediates that bind to heme proteins to inhibit their functions. Although much of their biological functions involve coordination to the Fe centers of hemes, the factors that determine N-binding or O-binding of these ArNOs have not been determined. We utilize X-ray crystallography and density functional theory (DFT) analyses of new representative ferrous and ferric ArNO compounds to provide the first theoretical insight into preferential N-binding versus O-binding of ArNOs to hemes. Our X-ray structural results favored N-binding of ArNO to ferrous heme centers, and O-binding to ferric hemes. Results of the DFT calculations rationalize this preferential binding on the basis of the energies of associated spin-states, and reveal that the dominant stabilization forces in the observed ferrous N-coordination and ferric O-coordination are dπ-pπ* and dσ-pπ*, respectively. Our results provide, for the first time, an explanation why in situ oxidation of the ferrous-ArNO compound to its ferric state results in the observed subsequent dissociation of the ligand.
Collapse
Affiliation(s)
- Erwin G Abucayon
- Department of Chemistry and Biochemistry, University of Oklahoma, 101 Stephenson Parkway, Norman, OK 73019, USA.
| | - Jia-Min Chu
- Department of Chemistry and Chemical Biology, Stevens Institute of Technology, Castle Point on Hudson, Hoboken, NJ 07030, USA.
| | - Megan Ayala
- Department of Chemistry and Biochemistry, University of Oklahoma, 101 Stephenson Parkway, Norman, OK 73019, USA.
| | - Rahul L Khade
- Department of Chemistry and Chemical Biology, Stevens Institute of Technology, Castle Point on Hudson, Hoboken, NJ 07030, USA.
| | - Yong Zhang
- Department of Chemistry and Chemical Biology, Stevens Institute of Technology, Castle Point on Hudson, Hoboken, NJ 07030, USA.
| | - George B Richter-Addo
- Department of Chemistry and Biochemistry, University of Oklahoma, 101 Stephenson Parkway, Norman, OK 73019, USA.
| |
Collapse
|
7
|
Korb M, Hosseini Ghazvini SMB, Moggach SA, Meunier JF, Bousseksou A, Low PJ. Rip It off: Nitro to Nitroso Reduction by Iron Half-Sandwich Complexes. Inorg Chem 2021; 60:4986-4995. [DOI: 10.1021/acs.inorgchem.1c00042] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Marcus Korb
- The University of Western Australia, School of Molecular Sciences, 35 Stirling Highway, Crawley, Perth, Western Australia 6009, Australia
| | | | - Stephen A. Moggach
- The University of Western Australia, School of Molecular Sciences, 35 Stirling Highway, Crawley, Perth, Western Australia 6009, Australia
| | - Jean-François Meunier
- CNRS, Université de Toulouse, Laboratoire de Chimie de Coordination, 205 route de Narbonne, 31077 Toulouse, France
| | - Azzedine Bousseksou
- CNRS, Université de Toulouse, Laboratoire de Chimie de Coordination, 205 route de Narbonne, 31077 Toulouse, France
| | - Paul J. Low
- The University of Western Australia, School of Molecular Sciences, 35 Stirling Highway, Crawley, Perth, Western Australia 6009, Australia
| |
Collapse
|
8
|
Powell SM, Thomas LM, Richter-Addo GB. The nitrosoamphetamine metabolite is accommodated in the active site of human hemoglobin: Spectroscopy and crystal structure. J Inorg Biochem 2020; 213:111262. [PMID: 33049600 DOI: 10.1016/j.jinorgbio.2020.111262] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 09/09/2020] [Accepted: 09/21/2020] [Indexed: 11/17/2022]
Abstract
Amphetamine-based (Amph) drugs are metabolized in humans to their hydroxylamine (AmphNHOH) and nitroso (AmphNO) derivatives. The latter metabolites are known to bind to the Fe centers of cytochrome P450 and other heme enzymes to inhibit their activities. Although these AmphNHOH/AmphNO metabolites are present in vivo, their interactions with the blood protein hemoglobin (Hb) and the muscle protein (Mb) have been largely discounted due to a perception that the relatively small heme active sites of Hb and Mb will not be able to accommodate the large AmphNO group. We report the 2.15 Å resolution X-ray crystal structure of the AmphNO adduct of adult human hemoglobin as the Hb [α-FeIII(H2O)][β-FeII(AmphNO)] derivative. We show that the binding of AmphNO to the β subunit is enabled by an E helix movement and stabilization of ligand binding by H-bonding with the distal His63 residue. We also observe an AmphNHOH group in the Xe2 pocket in close proximity to the α heme site in this derivative. Additionally, UV-vis spectroscopy was used to characterize this and related wt and mutant Mb adducts. Importantly, our X-ray crystal structure of this Hb-nitrosoamphetamine complex represents the first crystal structure of a wild-type heme protein adduct of any amphetamine metabolite. Our results provide a framework for further studies of AmphNHOH/AmphNO interactions with Hb and Mb as viable processes that potentially contribute to the overall biological inorganic chemistry of amphetamine drugs.
Collapse
Affiliation(s)
- Samantha M Powell
- Price Family Foundation Institute of Structural Biology, and Department of Chemistry and Biochemistry, University of Oklahoma, 101 Stephenson Parkway, Norman, OK 73019, United States of America
| | - Leonard M Thomas
- Price Family Foundation Institute of Structural Biology, and Department of Chemistry and Biochemistry, University of Oklahoma, 101 Stephenson Parkway, Norman, OK 73019, United States of America
| | - George B Richter-Addo
- Price Family Foundation Institute of Structural Biology, and Department of Chemistry and Biochemistry, University of Oklahoma, 101 Stephenson Parkway, Norman, OK 73019, United States of America.
| |
Collapse
|
9
|
Askari MS, Effaty F, Gennarini F, Orio M, Le Poul N, Ottenwaelder X. Tuning Inner-Sphere Electron Transfer in a Series of Copper/Nitrosoarene Adducts. Inorg Chem 2020; 59:8678-8689. [PMID: 32073833 DOI: 10.1021/acs.inorgchem.9b03175] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A series of copper/nitrosoarene complexes was created that mimics several steps in biomimetic O2 activation by copper(I). The reaction of the copper(I) complex of N,N,N',N'-tetramethypropylenediamine with a series of para-substituted nitrosobenzene derivatives leads to adducts in which the nitrosoarene (ArNO) is reduced by zero, one, or two electrons, akin to the isovalent species dioxygen, superoxide, and peroxide, respectively. The geometric and electronic structures of these adducts were characterized by means of X-ray diffraction, vibrational analysis, ultraviolet-visible spectroscopy, NMR, electrochemistry, and density functional theory (DFT) calculations. The bonding mode of the NO moiety depends on the oxidation state of the ArNO moiety: κN for ArNO, mononuclear η2-NO and dinuclear μ-η2:η1 for ArNO•-, and dinuclear μ-η2:η2 for ArNO2-. 15N isotopic labeling confirms the reduction state by measuring the NO stretching frequency (1392 cm-1 for κN-ArNO, 1226 cm-1 for η2-ArNO•-, 1133 cm-1 for dinuclear μ-η2:η1-ArNO•-, and 875 cm-1 for dinuclear μ-η2:η2 for ArNO2-). The 15N NMR signal disappears for the ArNO•- species, establishing a unique diagnostic for the radical state. Electrochemical studies indicate reduction waves that are consistent with one-electron reduction of the adducts and are compared with studies performed on Cu-O2 analogues. DFT calculations were undertaken to confirm our experimental findings, notably to establish the nature of the charge-transfer transitions responsible for the intense green color of the complexes. In fine, this family of complexes is unique in that it walks through three redox states of the ArNO moiety while keeping the metal and its supporting ligand the same. This work provides snapshots of the reactivity of the toxic nitrosoarene molecules with the biologically relevant Cu(I) ion.
Collapse
Affiliation(s)
- Mohammad S Askari
- Department of Chemistry and Biochemistry, Concordia University, Montreal, Quebec H4B 1R6, Canada
| | - Farshid Effaty
- Department of Chemistry and Biochemistry, Concordia University, Montreal, Quebec H4B 1R6, Canada
| | - Federica Gennarini
- Department of Chemistry and Biochemistry, Concordia University, Montreal, Quebec H4B 1R6, Canada.,Laboratoire de Chimie, Électrochimie Moléculaires et Chimie Analytique, UMR, CNRS 6521, Université de Bretagne Occidentale, Brest 29238, France
| | - Maylis Orio
- Aix Marseille Université, CNRS, Centrale Marseille, iSm2, Marseille 13007, France
| | - Nicolas Le Poul
- Laboratoire de Chimie, Électrochimie Moléculaires et Chimie Analytique, UMR, CNRS 6521, Université de Bretagne Occidentale, Brest 29238, France
| | - Xavier Ottenwaelder
- Department of Chemistry and Biochemistry, Concordia University, Montreal, Quebec H4B 1R6, Canada
| |
Collapse
|
10
|
Chan SC, Wong CY. Recent developments in ruthenium–nitrosoarene chemistry: Unconventional synthetic strategies, new ligand designs, and exploration of ligands redox non-innocence. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2019.213082] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
11
|
Emhoff KA, Balaraman L, Salem AM, Mudarmah KI, Boyd WC. Coordination chemistry of organic nitric oxide derivatives. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.06.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
12
|
Barnett BR, Labios LA, Moore CE, England J, Rheingold AL, Wieghardt K, Figueroa JS. Solution Dynamics of Redox Noninnocent Nitrosoarene Ligands: Mapping the Electronic Criteria for the Formation of Persistent Metal-Coordinated Nitroxide Radicals. Inorg Chem 2015; 54:7110-21. [DOI: 10.1021/acs.inorgchem.5b01252] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Brandon R. Barnett
- Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive, MC 0358, La Jolla, California 92093-0358, United States
| | - Liezel A. Labios
- Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive, MC 0358, La Jolla, California 92093-0358, United States
| | - Curtis E. Moore
- Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive, MC 0358, La Jolla, California 92093-0358, United States
| | - Jason England
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse
34−36, D-45470 Mülheim an der Ruhr, Germany
| | - Arnold L. Rheingold
- Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive, MC 0358, La Jolla, California 92093-0358, United States
| | - Karl Wieghardt
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse
34−36, D-45470 Mülheim an der Ruhr, Germany
| | - Joshua S. Figueroa
- Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive, MC 0358, La Jolla, California 92093-0358, United States
| |
Collapse
|
13
|
Hirao H, Thellamurege NM, Chuanprasit P, Xu K. Importance of H-abstraction in the final step of nitrosoalkane formation in the mechanism-based inactivation of cytochrome P450 by amine-containing drugs. Int J Mol Sci 2013; 14:24692-705. [PMID: 24351842 PMCID: PMC3876136 DOI: 10.3390/ijms141224692] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2013] [Revised: 11/27/2013] [Accepted: 11/29/2013] [Indexed: 11/29/2022] Open
Abstract
The metabolism of amine-containing drugs by cytochrome P450 enzymes (P450s) is prone to form a nitrosoalkane metabolic intermediate (MI), which subsequently coordinates to the heme iron of a P450, to produce a metabolic-intermediate complex (MIC). This type of P450 inhibition, referred to as mechanism-based inactivation (MBI), presents a serious concern in drug discovery processes. We applied density functional theory (DFT) to the reaction between N-methylhydroxylamine (NMH) and the compound I reactive species of P450, in an effort to elucidate the mechanism of the putative final step of the MI formation in the alkylamine metabolism. Our DFT calculations show that H-abstraction from the hydroxyl group of NMH is the most favorable pathway via which the nitrosoalkane intermediate is produced spontaneously. H-abstraction from the N–H bond was slightly less favorable. In contrast, N-oxidation and H-abstraction from the C–H bond of the methyl group had much higher energy barriers. Hence, if the conversion of NMH to nitrosoalkane is catalyzed by a P450, the reaction should proceed preferentially via H-abstraction, either from the O–H bond or from the N–H bond. Our theoretical analysis of the interaction between the MI and pentacoordinate heme moieties provided further insights into the coordination bond in the MIC.
Collapse
Affiliation(s)
- Hajime Hirao
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link 637371, Singapore.
| | | | | | | |
Collapse
|
14
|
CHEN LI, FOX JESSEB, YI GEUNBAE, KHAN MASOODA, RICHTER-ADDO GEORGEB. Synthesis and molecular structures of N,N-dialkyl-4-nitrosoaniline adducts of formally d6 metalloporphyrins of ruthenium and cobalt. J PORPHYR PHTHALOCYA 2012. [DOI: 10.1002/jpp.382] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Para-aminosubstituted nitrosoarenes react with Ru ( CO )( OEP ) or [ Co ( TPP )( THF )2] SbF 6 (OEP2- = 2,3,7,8,12,13,17,18-octaethylporphyrinato dianion, TPP2- = 5,10,15,20-tetraphenylporphyrinato dianion) to generate Ru ( OEP )( ONC 6 H 4 NMe 2)2 and [ Co ( TPP )( ONC 6 H 4 NR 2)2] SbF 6 ( R = Me , Et ), respectively, in fair to high yields. These N -bound nitrosoarene complexes have been characterized by spectroscopic methods. The complexes Ru ( OEP )( ONC 6 H 4 NMe 2)2 and [ Co ( TPP )( ONC 6 H 4 NMe 2)2] ClO 4 have also been characterized by single-crystal X-ray crystallography. Their structures represent the first reported solid-state structures of Ru and Co porphyrins containing C-nitroso ligands.
Collapse
Affiliation(s)
- LI CHEN
- Department of Chemistry and Biochemistry, University of Oklahoma, 620 Parrington Oval, Norman, OK 73019, USA
| | - JESSE B. FOX
- Department of Chemistry and Biochemistry, University of Oklahoma, 620 Parrington Oval, Norman, OK 73019, USA
| | - GEUN-BAE YI
- Department of Chemistry and Biochemistry, University of Oklahoma, 620 Parrington Oval, Norman, OK 73019, USA
| | - MASOOD A. KHAN
- Department of Chemistry and Biochemistry, University of Oklahoma, 620 Parrington Oval, Norman, OK 73019, USA
| | - GEORGE B. RICHTER-ADDO
- Department of Chemistry and Biochemistry, University of Oklahoma, 620 Parrington Oval, Norman, OK 73019, USA
| |
Collapse
|
15
|
Chan SC, Cheung HY, Wong CY. Ruthenium Complexes Containing 2-(2-Nitrosoaryl)pyridine: Structural, Spectroscopic, and Theoretical Studies. Inorg Chem 2011; 50:11636-43. [DOI: 10.1021/ic201570d] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Siu-Chung Chan
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, People’s Republic of China
| | - Ho-Yuen Cheung
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, People’s Republic of China
| | - Chun-Yuen Wong
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, People’s Republic of China
| |
Collapse
|
16
|
Escola N, Bikiel DE, Baggio R, Di Salvo F, Doctorovich F. NO+, NO, NO−! Nitrosyl siblings from [IrCl5(NO)]−. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.02.063] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
17
|
Tomson NC, Labios LA, Weyhermüller T, Figueroa JS, Wieghardt K. Redox Noninnocence of Nitrosoarene Ligands in Transition Metal Complexes. Inorg Chem 2011; 50:5763-76. [DOI: 10.1021/ic2005979] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Neil C. Tomson
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Liezel A. Labios
- Department of Chemistry and Biochemistry, University of California-San Diego, 9500 Gilman Drive, Mail Code 0358, La Jolla, California 92093-0358, United States
| | - Thomas Weyhermüller
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Joshua S. Figueroa
- Department of Chemistry and Biochemistry, University of California-San Diego, 9500 Gilman Drive, Mail Code 0358, La Jolla, California 92093-0358, United States
| | - Karl Wieghardt
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| |
Collapse
|
18
|
Kumar MR, Fukuto JM, Miranda KM, Farmer PJ. Reactions of HNO with heme proteins: new routes to HNO-heme complexes and insight into physiological effects. Inorg Chem 2010; 49:6283-92. [PMID: 20666387 DOI: 10.1021/ic902319d] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The formation and interconversion of nitrogen oxides has been of interest in numerous contexts for decades. Early studies focused on gas-phase reactions, particularly with regard to industrial and atmospheric environments, and on nitrogen fixation. Additionally, investigation of the coordination chemistry of nitric oxide (NO) with hemoglobin dates back nearly a century. With the discovery in the early 1980s that NO is biosynthesized as a molecular signaling agent, the literature has been focused on the biological effects of nitrogen oxides, but the original concerns remain relevant. For instance, hemoglobin has long been known to react with nitrite, but this reductase activity has recently been considered to be important to produce NO under hypoxic conditions. The association of nitrosyl hydride (HNO; also commonly referred to as nitroxyl) with heme proteins can also produce NO by reductive nitrosylation. Furthermore, HNO is considered to be an intermediate in bacterial denitrification, but conclusive identification has been elusive. The authors of this article have approached the bioinorganic chemistry of HNO from different perspectives, which have converged because heme proteins are important biological targets of HNO.
Collapse
Affiliation(s)
- Murugaeson R Kumar
- Department of Chemistry and Biochemistry, Baylor University, Waco, Texas 76706, USA
| | | | | | | |
Collapse
|
19
|
Xu N, Goodrich LE, Lehnert N, Powell DR, Richter-Addo GB. Five- and six-coordinate adducts of nitrosamines with ferric porphyrins: structural models for the Type II interactions of nitrosamines with ferric cytochrome P450. Inorg Chem 2010; 49:4405-19. [PMID: 20392126 DOI: 10.1021/ic901751z] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Nitrosamines are well-known for their toxic and carcinogenic properties. The metabolic activation of nitrosamines occurs via interaction with the heme-containing cytochrome P450 enzymes. We report the preparation and structural characterization of a number of nitrosamine adducts of synthetic iron porphyrins. The reactions of the cations [(por)Fe(THF)(2)]ClO(4) (por = TPP, TTP, OEP) with dialkylnitrosamines (R(2)NNO; R(2) = Me(2), Et(2), (cyclo-CH(2))(4), (cyclo-CH(2))(5), (PhCH(2))(2)) in toluene generate the six-coordinate high-spin (S = 5/2) [(por)Fe(ONNR(2))(2)]ClO(4) compounds and a five-coordinate intermediate-spin (S = 3/2) [(OEP)Fe(ONNMe(2))]ClO(4) derivative in 57-72% yields (TPP = 5,10,15,20-tetraphenylporphyrinato dianion, TTP = 5,10,15,20-tetra-p-tolylporphyrinato dianion, OEP = 2,3,7,8,12,13,17,18-octaethylporphyrinato dianion). The N-O and N-N vibrations of the coordinated nitrosamine groups in [(por)Fe(ONNR(2))(2)]ClO(4) occur in the 1239-1271 cm(-1) range. Three of the six-coordinate [(por)Fe(ONNR(2))(2)]ClO(4) compounds and one five-coordinate [(OEP)Fe(ONNMe(2))]ClO(4) compound have been characterized by single crystal X-ray crystallography. All the nitrosamine ligands in these complexes bind to the ferric centers via a sole eta(1)-O binding mode. No arylnitrosamine adducts were obtained from the reactions of the precursor compounds [(por)Fe(THF)(2)]ClO(4) with three arylnitrosamines (Ph(2)NNO, Ph(Me)NNO, Ph(Et)NNO). However, prolonged exposure of [(por)Fe(THF)(2)]ClO(4) to these arylnitrosamines resulted in the formation of the known five-coordinate (por)Fe(NO) derivatives. The latter (por)Fe(NO) compounds were obtained more readily by the reactions of the three arylnitrosamines with the four-coordinate (por)Fe(II) precursors.
Collapse
Affiliation(s)
- Nan Xu
- Department of Chemistry and Biochemistry, University of Oklahoma, 620 Parrington Oval, Norman, Oklahoma 73019, USA
| | | | | | | | | |
Collapse
|
20
|
Ling Y, Mills C, Weber R, Yang L, Zhang Y. NMR, IR/Raman, and structural properties in HNO and RNO (R = alkyl and aryl) metalloporphyrins with implication for the HNO-myoglobin complex. J Am Chem Soc 2010; 132:1583-91. [PMID: 20078039 PMCID: PMC2820278 DOI: 10.1021/ja907342s] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Structural and functional details of heme protein complexes with HNO and the isoelectronic RNO (R = alkyl and aryl) molecules (metabolic intermediates) are largely unknown. We report a quantum chemical investigation of three characteristic spectroscopic properties, (1)H and (15)N NMR chemical shifts and NO vibrational frequencies in synthetic HNO and RNO heme complexes, with theory-versus-experiment correlation coefficients R(2) = 0.990-0.998. A new density functional theory (DFT) method was found to yield excellent predictions of experimental structures of HNO, RNO, and NO heme systems. Interestingly, this method also helps the identification of an excellent linear quantitative structure observable relationship between NO vibrational frequencies and bond lengths in all of these NO-containing systems. This suggests that NO vibrations are largely local effects of the NO bonds in these complexes and may help deduce the NO bond lengths from using experimental vibrational data in these systems. The NO vibrational frequencies in HNO, RNO, and NO metalloporphyrins were found to follow a general trend of NO > RNO > HNO complexes, as a result of the electron populations in the antibonding NO orbitals of NO < RNO < HNO complexes. Investigations of the NMR and IR/Raman spectroscopic data in HNO metal complexes show that HNO is a strong pi-acid. In addition, we performed the first quantum chemical investigation of the hydrogen-bond effect on HNO in MbHNO (Mb = myoglobin) models. On the basis of comparisons with experimental (1)H and (15)N NMR results and NO vibrational frequency in MbHNO, a dual hydrogen-bond mode for HNO in MbHNO was proposed. The enhanced stability from this dual hydrogen bonding may provide a basis for the unusual stability of MbHNO observed experimentally. These results should facilitate spectroscopic characterizations and structural investigations of HNO and RNO heme proteins and models.
Collapse
Affiliation(s)
- Yan Ling
- Department of Chemistry and Biochemistry, University of Southern Mississippi, 118 College Drive #5043, Hattiesburg, MS 39406
| | - Christopher Mills
- Department of Chemistry and Biochemistry, University of Southern Mississippi, 118 College Drive #5043, Hattiesburg, MS 39406
| | - Rebecca Weber
- Department of Chemistry and Biochemistry, University of Southern Mississippi, 118 College Drive #5043, Hattiesburg, MS 39406
| | - Liu Yang
- Department of Chemistry and Biochemistry, University of Southern Mississippi, 118 College Drive #5043, Hattiesburg, MS 39406
| | - Yong Zhang
- Department of Chemistry and Biochemistry, University of Southern Mississippi, 118 College Drive #5043, Hattiesburg, MS 39406
| |
Collapse
|
21
|
Kumar MR, Pervitsky D, Chen L, Poulos T, Kundu S, Hargrove MS, Rivera EJ, Diaz A, Colón JL, Farmer PJ. Nitrosyl hydride (HNO) as an O2 analogue: long-lived HNO adducts of ferrous globins. Biochemistry 2009; 48:5018-25. [PMID: 19368336 DOI: 10.1021/bi900122r] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Nitrosyl hydride, HNO or nitroxyl, is the one-electron reduced and protonated form of nitric oxide. HNO is isoelectronic to singlet O(2), and we have previously reported that deoxymyoglobin traps free HNO to form a stable adduct. In this report, we demonstrate that oxygen-binding hemoglobins from human, soy, and clam also trap HNO to form adducts which are stable over a period of weeks. The same species can be formed in higher yields by careful reduction of the ferrous nitrosyl adducts of the proteins. Like the analogous O(2)-Fe(II) adducts, the HNO adducts are diamagnetic, but with a characteristic HNO resonance in (1)H NMR at ca. 15 ppm that splits into doublets for H(15)NO adducts. The (1)H and (15)N NMR resonances, obtained by HSQC experiments, are shown to differentiate subunits and isoforms of proteins within mixtures. An apparent difference in the reduction rates of the NO adducts of the two subunits of human hemoglobin allows assignment of two distinct nitrosyl hydride peaks by a combination of UV-vis, NMR, and EPR analysis. The two peaks of the HNO-hHb adduct have a persistent 3:1 ratio during trapping reactions, demonstrating a kinetic difference between HNO binding at the two subunits. These results show NMR characterization of ferrous HNO adducts as a unique tool sensitive to structural changes within the oxygen-binding cavity, which may be of use in defining modes of oxygen binding in other heme proteins and enzymes.
Collapse
Affiliation(s)
- Murugaeson R Kumar
- Department of Chemistry, University of California, Irvine, California 92697, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Gutiérrez MM, Alluisetti GB, Gaviglio C, Doctorovich F, Olabe JA, Amorebieta VT. Catalytic disproportionation of N-alkylhydroxylamines bound to pentacyanoferrates. Dalton Trans 2009:1187-94. [PMID: 19322490 DOI: 10.1039/b812173g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The substituted hydroxylamines, CH(3)N(H)OH (N-methylhydroxylamine) and (CH(3))(2)NOH (N,N-dimethylhydroxylamine), disproportionate catalytically to the corresponding alkylamines and oxidation products, only in the presence of [Fe(CN)(5)H(2)O](3-). Substitution kinetic measurements suggest an initial coordination step to Fe(ii). Two parallel N- and O-coordination modes are considered with the subsequent formation of Fe(iii), free aminyl (RNCH(3)) and nitroxide (RN(CH(3))O) radicals (R = H, CH(3)). With CH(3)N(H)OH, bound nitrosomethane, CH(3)NO, has been characterized by UV-visible and IR spectroscopies. The mechanism is discussed on the basis of common and differential features with respect to the disproportionation of hydroxylamine catalyzed by the same Fe-fragment.
Collapse
Affiliation(s)
- María M Gutiérrez
- Department of Chemistry, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Funes y Roca, Mar del Plata, B7602AYL, Argentina
| | | | | | | | | | | |
Collapse
|
23
|
Prateeptongkum S, Jovel I, Jackstell R, Vogl N, Weckbecker C, Beller M. First iron-catalyzed synthesis of oximes from styrenes. Chem Commun (Camb) 2009:1990-2. [DOI: 10.1039/b900326f] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
24
|
Mansuy D. Biocatalysis and substrate chemodiversity: Adaptation of aerobic living organisms to their chemical environment. Catal Today 2008. [DOI: 10.1016/j.cattod.2008.04.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
25
|
Khvostichenko D, Yang QZ, Boulatov R. Simple Heme Dimers with Strongly Cooperative Ligand Binding. Angew Chem Int Ed Engl 2007; 46:8368-70. [PMID: 17902082 DOI: 10.1002/anie.200702120] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
26
|
Khvostichenko D, Yang QZ, Boulatov R. Simple Heme Dimers with Strongly Cooperative Ligand Binding. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200702120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
27
|
Mansuy D. A brief history of the contribution of metalloporphyrin models to cytochrome P450 chemistry and oxidation catalysis. CR CHIM 2007. [DOI: 10.1016/j.crci.2006.11.001] [Citation(s) in RCA: 155] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
28
|
Escola N, Llebaría A, Leitus G, Doctorovich F. Formation of Coordinated C-Nitroso Compounds by Reaction of K[IrCl5NO] with Alkenes. Organometallics 2006. [DOI: 10.1021/om060141v] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Natalia Escola
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II, piso 3, C1428EHA Buenos Aires, Argentina, and Department of Chemical Services, The Weizmann Institute of Science, Rehovot 76100, Israel
| | - Analuz Llebaría
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II, piso 3, C1428EHA Buenos Aires, Argentina, and Department of Chemical Services, The Weizmann Institute of Science, Rehovot 76100, Israel
| | - Gregory Leitus
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II, piso 3, C1428EHA Buenos Aires, Argentina, and Department of Chemical Services, The Weizmann Institute of Science, Rehovot 76100, Israel
| | - Fabio Doctorovich
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II, piso 3, C1428EHA Buenos Aires, Argentina, and Department of Chemical Services, The Weizmann Institute of Science, Rehovot 76100, Israel
| |
Collapse
|
29
|
Scheidt WR, Lee YJ. Recent advances in the stereochemistry of metallotetrapyrroles. STRUCTURE AND BONDING 2006. [DOI: 10.1007/bfb0036789] [Citation(s) in RCA: 409] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
30
|
Krinninger C, Högg C, Nöth H, Gálvez Ruiz JC, Mayer P, Burkacky O, Zumbusch A, Lorenz IP. Dichroic, dinuclear mu2-(eta2-NO)-nitrosoaniline-bridged complexes of rhenium of the type [[(CO)3Re(mu-X)]2ONC6H4NR2] (X = Cl, Br, I; R = Me, Et). Chemistry 2005; 11:7228-36. [PMID: 16193521 DOI: 10.1002/chem.200401208] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
A series of unusual dinuclear mu2-(eta2-NO)-nitrosoaniline-bridged complexes [[(CO)3Re(mu-X)]2ONC6H4NR2] (X = Cl, Br, I; R = Me, Et) with dichroic properties have been synthesised by reaction of pentacarbonylhalogenorhenium(I) [(CO)5ReX] (X = Cl, Br, I) with the corresponding nitrosoaniline derivatives R2NC6H4NO (R = Me, Et). The deeply coloured solutions in CH2Cl2 show broad UV/Vis absorptions from 595 to 620 nm depending on the halogen bridges and N substituents. Single crystals of all six compounds exhibit a pronounced linear dichroism. The molecular structures have been determined by single-crystal X-ray analyses. All the compounds contain two face-shared octahedra, with two halogens and one NO ligand as bridges. The NO ligand coordinates in a nonsymmetrical eta2-like fashion with N or O coordination to each Re centre. Therefore, the C-nitroso group and the planar NC2 moiety of NR2 both lie almost exactly within the symmetry plane of the dinuclear complexes. These complexes belong to the novel and simple class of neutral dinuclear C-nitroso complexes that include the rare, non-assisted mu2-(eta2-NO) ligand function and have only single halogen atoms in bridging positions.
Collapse
Affiliation(s)
- Christoph Krinninger
- Ludwig-Maximilians-Universität München, Department of Chemistry and Biochemistry, Butenandtstrasse 5-13, 81377 Munich, Germany
| | | | | | | | | | | | | | | |
Collapse
|
31
|
Wilberger R, Krinninger C, Piotrowski H, Mayer P, Lorenz IP. A New Dichroic, Nitroso-Bridged Complex of Rhenium: Di-μ2-chloro[μ2-(η2-N,O)-N,N-dimethyl-4-nitrosoaniline]bis[tricarbonylrhenium(I)]. Eur J Inorg Chem 2004. [DOI: 10.1002/ejic.200300928] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
32
|
Ricoux R, Lukowska E, Pezzotti F, Mahy JP. New activities of a catalytic antibody with a peroxidase activity. ACTA ACUST UNITED AC 2004; 271:1277-83. [PMID: 15030477 DOI: 10.1111/j.1432-1033.2004.04032.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
In order to estimate the size of the cavity remaining around the heme of the 3A3-microperoxidase 8 (MP8) hemoabzyme, the formation of 3A3-MP8-Fe(II)-nitrosoalkane complexes upon oxidation of N-monosubstituted hydroxylamines was examined. This constituted a new reaction for hemoabzymes and is the first example of fully characterized Fe(II)-metabolite complexes of antibody-porphyrin. Also, via a comparison of the reactions with N-substituted hydroxylamines of various size and hydrophobicity, antibody 3A3 was confirmed to bring about a partial steric hindrance on the distal face of MP8. Subsequently, the influence of the antibody on the stereoselectivity of the S-oxidation of sulfides was examined. Our results showed that MP8 alone and the antibody-MP8 complex catalyze the oxidation of thioanisole by H(2)O(2) and tert-butyl hydroperoxide, following a peroxidase-like two-step oxygen-transfer mechanism involving a radical-cation intermediate. The best system, associating H(2)O(2) as oxidant and 3A3-MP8 as a catalyst, in the presence of 5% tert-butyl alcohol, led to the stereoselective S-oxidation of thioanisole with a 45% enantiomeric excess in favour of the R isomer. This constitutes the highest enantiomeric excess reported to date for the oxidation of sulfides catalyzed by hemoabzymes.
Collapse
Affiliation(s)
- Rémy Ricoux
- Laboratoire de Chimie Bioorganique et Bioinorganique, Institut de Chimie Moléculaire et des Matériaux d'Orsay, Université Paris-Sud XI, Orsay, France
| | | | | | | |
Collapse
|
33
|
O'Connor JM, Bunker KD. Conversion of (η5-C5H5)Co(PPh3)2 and Nitro Compounds to Mononuclear η1(N)-Nitrosoalkyl and Dinuclear μ-η1(N):η2(N,O)-Nitrosoaryl Complexes. Organometallics 2003. [DOI: 10.1021/om034083e] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Joseph M. O'Connor
- Department of Chemistry and Biochemistry, 9500 Gilman Drive, University of California at San Diego, La Jolla, California 92093-0358
| | - Kevin D. Bunker
- Department of Chemistry and Biochemistry, 9500 Gilman Drive, University of California at San Diego, La Jolla, California 92093-0358
| |
Collapse
|
34
|
Copeland DM, West AH, Richter-Addo GB. Crystal structures of ferrous horse heart myoglobin complexed with nitric oxide and nitrosoethane. Proteins 2003; 53:182-92. [PMID: 14517970 DOI: 10.1002/prot.10495] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The interactions of nitric oxide (NO) and organic nitroso compounds with heme proteins are biologically important, and adduct formation between NO-containing compounds and myoglobin (Mb) have served as prototypical systems for studies of these interactions. We have prepared crystals of horse heart (hh) MbNO from nitrosylation of aqua-metMb crystals, and we have determined the crystal structure of hh MbNO at a resolution of 1.9 A. The Fe-N-O angle of 147 degrees in hh MbNO is larger than the corresponding 112 degrees angle previously determined from the crystal structure of sperm whale MbNO (Brucker et al., Proteins 1998;30:352-356) but is similar to the 150 degrees angle determined from a MS XAFS study of a frozen solution of hh MbNO (Rich et al., J Am Chem Soc 1998;120:10827-10836). The Fe-N(O) bond length of 2.0 A (this work) is longer than the 1.75 A distance determined from the XAFS study and suggests distal pocket influences on FeNO geometry. The nitrosyl N atom is located 3.0 A from the imidazole N(epsilon) atom of the distal His64 residue, suggesting electrostatic stabilization of the FeNO moiety by His64. The crystal structure of the nitrosoethane adduct of ferrous hh Mb was determined at a resolution of 1.7 A. The nitroso O atom of the EtNO ligand is located 2.7 A from the imidazole N(epsilon) atom of His64, suggesting a hydrogen bond interaction between these groups. To the best of our knowledge, the crystal structure of hh Mb(EtNO) is the first such determination of a nitrosoalkane adduct of a heme protein.
Collapse
Affiliation(s)
- Daniel M Copeland
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019, USA
| | | | | |
Collapse
|
35
|
Li Y, Huang JS, Zhou ZY, Che CM, You XZ. Remarkably stable iron porphyrins bearing nonheteroatom-stabilized carbene or (alkoxycarbonyl)carbenes: isolation, X-ray crystal structures, and carbon atom transfer reactions with hydrocarbons. J Am Chem Soc 2002; 124:13185-93. [PMID: 12405847 DOI: 10.1021/ja020391c] [Citation(s) in RCA: 163] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Reactions of [Fe(TPFPP)] (TPFPP = meso-tetrakis(pentafluorophenyl)porphyrinato dianion) with diazo compounds N(2)C(Ph)R (R = Ph, CO(2)Et, CO(2)CH(2)CH=CH(2)) afforded [Fe(TPFPP)(C(Ph)R)] (R = Ph (1), CO(2)Et (2), CO(2)CH(2)CH=CH(2) (3)) in 65-70% yields. Treatment of 1 with N-methylimidazole (MeIm) gave the adduct [Fe(TPFPP)(CPh(2))(MeIm)] (4) in 65% yield. These new iron porphyrin carbene complexes were characterized by NMR and UV-vis spectroscopy, mass spectrometry, and elemental analyses. X-ray crystal structure determinations of 1.0.5C(6)H(6).0.5CH(2)Cl(2) and 4 reveal Fe=CPh(2) bond lengths of 1.767(3) (1) and 1.827(5) A (4), together with large ruffling distortions of the TPFPP macrocycle. Complexes 2 and 4 are reactive toward styrene, affording the corresponding cyclopropanes in 82 and 53% yields, respectively. Complex 1 is an active catalyst for both intermolecular cyclopropanation of styrenes with ethyl diazoacetate and intramolecular cyclopropanation of allylic diazoacetates. Reactions of 2 and 4 with cyclohexene or cumene produced allylic or benzylic C-H insertion products in up to 83% yield.
Collapse
Affiliation(s)
- Yan Li
- Department of Chemistry and Open Laboratory of Chemical Biology of the Institute of Molecular Technology for Drug Discovery and Synthesis, The University of Hong Kong, Pokfulam Road, Hong Kong
| | | | | | | | | |
Collapse
|
36
|
Lee J, Twamley B, Richter-Addo GB. Synthesis and solid-state molecular structures of bis- and mono-nitrosobenzene complexes of ruthenium porphyrins. CAN J CHEM 2002. [DOI: 10.1139/v02-155] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Bis-nitrosobenzene complexes of the form (por)Ru(PhNO)2 (por = TPP, TTP; TPP = tetraphenylporphyrinato dianion, TTP = tetratolylporphyrinato dianion) have been prepared in good yields from the reaction of the (por)Ru(CO) precursor with excess PhNO in dichloromethane. The IR spectra of the complexes (as KBr pellets) displayed new bands at ~1348 cm1, due to υNO. The solid-state molecular structure of (TPP)Ru(PhNO)2 was determined by single-crystal X-ray diffraction, and revealed that the PhNO ligands are bound to the Ru center via the N-binding mode. Reactions of the (por)Ru(PhNO)2 complexes with excess 1-methylimidazole gave the mono-nitrosobenzene complexes (por)Ru(PhNO)(1-MeIm). The IR spectra revealed a lowering of υNO in these mononitrosobenzene derivatives by ~27 cm1, a feature consistent with the replacement of one π-acid PhNO ligand with the more basic 1-MeIm ligand. The solid-state molecular structure of (TPP)Ru(PhNO)(1-MeIm) reveals, in addition to the N-binding of the PhNO ligand, an essentially parallel arrangement of the C-N-O (of PhNO) and imidazole planes; this is in contrast with the (TPP)Ru(PhNO)2 complex, in which the C-N-O planes (of PhNO) are essentially perpendicular.Key words: nitroso, X-ray, ruthenium, porphyrin, imidazole.
Collapse
|
37
|
Ricoux R, Boucher JL, Mansuy D, Mahy JP. Microperoxidase 8 (mp8) as a convenient model for hemoproteins: formation and characterisation of new iron(II)-nitrosoalkane complexes of biological relevance. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2002; 500:149-52. [PMID: 11764928 DOI: 10.1007/978-1-4615-0667-6_19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- R Ricoux
- Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, UMR 8601 CNRS, Université Paris V, France
| | | | | | | |
Collapse
|
38
|
Lee J, Chen L, West AH, Richter-Addo GB. Interactions of organic nitroso compounds with metals. Chem Rev 2002; 102:1019-66. [PMID: 11942786 DOI: 10.1021/cr0000731] [Citation(s) in RCA: 188] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Jonghyuk Lee
- Department of Chemistry and Biochemistry, University of Oklahoma, 620 Parrington Oval, Norman, OK 73019, USA
| | | | | | | |
Collapse
|
39
|
Liang JL, Huang JS, Zhou ZY, Cheung KK, Che CM. Interaction between dioxoruthenium(VI) porphyrins and hydroxylamines: coordination of N-substituted hydroxylamine to ruthenium and X-ray crystal structures of ruthenium complexes with a unidentate nitrosoarene ligand. Chemistry 2001; 7:2306-17. [PMID: 11446633 DOI: 10.1002/1521-3765(20010601)7:11<2306::aid-chem23060>3.0.co;2-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The interactions between dioxoruthenium(VI) porphyrins 1 with N-phenylhydroxylamine or unsubstituted hydroxylamine are described. Reaction of complexes 1 with excess PhNHOH leads to isolation of bis(nitrosobenzene)ruthenium(II) porphyrins 3 and mono(nitrosobenzene)ruthenium(II) porphyrins 4. Both the types of ruthenium complexes are characterized by 1H NMR, IR, and UV/Vis spectroscopy, and mass spectrometry. The X-ray structure determinations on [Ru(II)(TPP)(PhNO)2] (3a), [Ru(II)(2,6-Cl-TPP)(PhNO)2] (3e), and [Ru(II)(4-MeO-TPP)(PhNO)(PhNH2)] (4d) (TPP tetraarylporphyrin) disclose a unidentate nitrosoarene coordination in all these complexes, with Ru-N(PhNO) bond lengths of 2.003(3) (3a, average), 1.991(3) (3e, average), and 2.042(2) A (4d). In the case of 4d, the Ru-N(PhNH2) bond length is found to be 2.075(3) A. Mechanistic investigations reveal the formation of intermediates [Ru(II)(Por)(PhNO)(PhNHOH)] (5; Por=porphyrin), a ruthenium complex with N-substituted hydroxylamine ligand, in the "1 + PhNHOH" system. The Ru-NH(OH)Ph moiety in 5 undergoes no rapid exchange with free PhNHOH in solution at room temperature, as revealed by 1H NMR spectroscopy. Unlike the interaction between complexes 1 and PhNHOH, reaction of such complexes with NH2OH affords nitrosylruthenium(II) porphyrins [Ru(II)(Por)(NO)(OH)] (6).
Collapse
Affiliation(s)
- J L Liang
- Department of Chemistry, The University of Hong Kong.
| | | | | | | | | |
Collapse
|
40
|
Ricoux R, Boucher JL, Mansuy D, Mahy JP. Formation of iron(II)-nitrosoalkane complexes: a new activity of microperoxidase 8. Biochem Biophys Res Commun 2000; 278:217-23. [PMID: 11071875 DOI: 10.1006/bbrc.2000.3785] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Microperoxidase 8 (MP8) is a heme octapeptide, obtained by enzymatic hydrolysis of heart cytochrome c, in which a histidine is axially coordinated to the heme iron, and acts as its fifth ligand. It exhibits two kinds of activities: a peroxidase-like activity and a cytochrome P450-like activity. We here show that MP8 is not only able to oxidize various aliphatic and aromatic hydroxylamines with the formation of MP8-Fe(II)-nitrosoalkane or -arene complexes absorbing around 414 nm, but also that these complexes can be obtained by reduction of nitroalkanes. This is the first example of fully characterized iron(II)-metabolite complexes of MP8. Such complexes constitute good models for those obtained upon oxidation of amphetamine or macrolids by cytochromes P450. In addition, this is a new catalytic activity of MP8, which validates the use of this mini-enzyme as a convenient model for hemoproteins of interest in toxicology and pharmacology such as cytochromes P450 and peroxidases.
Collapse
Affiliation(s)
- R Ricoux
- Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, UMR 8601 CNRS, Université Paris V, 45 rue des Saints-Pères, 75270, Paris cedex 06, France
| | | | | | | |
Collapse
|
41
|
Iwasa T, Shimada H, Takami A, Matsuzaka H, Ishii Y, Hidai M. Preparation of Cationic Dinuclear Hydrido Complexes of Ruthenium, Rhodium, and Iridium with Bridging Thiolato Ligands and Their Reactions with Nitrosobenzene. Inorg Chem 1999; 38:2851-2859. [PMID: 11671030 DOI: 10.1021/ic981274e] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A series of cationic dinuclear hydrido complexes with bridging thiolato ligands [CpMH(&mgr;-SPr(i))(2)MCp][OTf] (4, M = Ru; 6a, M = Rh; 7a, M = Ir; Cp = eta(5)-C(5)Me(5), OTf = OSO(2)CF(3)) were synthesized by treatment of the corresponding chloro complexes [CpRuCl(&mgr;-SPr(i))(2)Ru(OH(2))Cp][OTf] (1) or [CpM(&mgr;-Cl)(&mgr;-SPr(i))(2)MCp][OTf] (2, M = Rh; 3, M = Ir) with HSiEt(3). The dirhodium and diiridium complexes 6 and 7 have been shown to possess a bridging hydrido ligand by crystallographic analysis, while the diruthenium complex 4 is proposed to have a terminal hydrido ligand that undergoes facile migration between the two ruthenium centers in solution. Complexes 4, 6a, and 7a reacted with nitrosobenzene to give the paramagnetic dinuclear nitrosobenzene complexes [CpM(&mgr;-PhNO)(&mgr;-SPr(i))(2)MCp](+) (M = Ru, Rh, Ir) along with azoxybenzene. The molecular structures of the three nitrosobenzene complexes have been determined by X-ray diffraction study to reveal that in each case nitrosobenzene acts as a &mgr;-eta(1):eta(1)-N,O ligand. Judging from the molecular structures and the ESR spectra, the unpaired electron is considered to be located mainly on the nitrosobenzene ligand, at least in the diruthenium and dirhodium complexes. On the other hand, complex 2 reacted with nitrosobenzene to give the incomplete cubane-type trinuclear cluster [(CpRh)(3)(&mgr;-Cl)(2)(&mgr;(3)-S)(&mgr;-SPr(i))](+), whose molecular structure has also been determined crystallographically.
Collapse
Affiliation(s)
- Takafumi Iwasa
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | | | | | | | | | | |
Collapse
|
42
|
Godbout N, Sanders LK, Salzmann R, Havlin RH, Wojdelski M, Oldfield E. Solid-State NMR, Mössbauer, Crystallographic, and Density Functional Theory Investigation of Fe−O2 and Fe−O2 Analogue Metalloporphyrins and Metalloproteins. J Am Chem Soc 1999. [DOI: 10.1021/ja9832820] [Citation(s) in RCA: 93] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nathalie Godbout
- Contribution from the Departments of Chemistry and Biophysics, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801
| | - Lori K. Sanders
- Contribution from the Departments of Chemistry and Biophysics, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801
| | - Renzo Salzmann
- Contribution from the Departments of Chemistry and Biophysics, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801
| | - Robert H. Havlin
- Contribution from the Departments of Chemistry and Biophysics, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801
| | - Mark Wojdelski
- Contribution from the Departments of Chemistry and Biophysics, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801
| | - Eric Oldfield
- Contribution from the Departments of Chemistry and Biophysics, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801
| |
Collapse
|
43
|
Affiliation(s)
- George B. Richter-Addo
- Department of Chemistry and Biochemistry, University of Oklahoma, 620 Parrington Oval, Norman, Oklahoma 73019
| |
Collapse
|
44
|
Jung F, Griffin KJ, Song W, Richardson TH, Yang M, Johnson EF. Identification of amino acid substitutions that confer a high affinity for sulfaphenazole binding and a high catalytic efficiency for warfarin metabolism to P450 2C19. Biochemistry 1998; 37:16270-9. [PMID: 9819219 DOI: 10.1021/bi981704c] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Human cytochrome P450s 2C9 and 2C19 metabolize many important drugs including tolbutamide, phenytoin, and (S)-warfarin. Although they differ at only 43 of 490 amino acids, sulfaphenazole (SFZ) is a potent and selective inhibitor of P450 2C9 with an IC50 and a spectrally determined binding constant, KS, of <1 microM. P450 2C19 is not affected by SFZ at concentrations up to 100 microM. A panel of CYP2C9/2C19 chimeric proteins was constructed in order to identify the sequence differences that underlie this difference in SFZ binding. Replacement of amino acids 227-338 in 2C19 with the corresponding region of 2C9 resulted in high-affinity SFZ binding (KS approximately 4 microM) that was not seen when a shorter fragment of 2C9 was substituted (227-282). However, replacement of amino acids 283-338 resulted in extremely low holoenzyme expression levels in Escherichia coli, indicating protein instability. A single mutation, E241K, which homology modeling indicated would restore a favorable charge pair interaction between K241 in helix G and E288 in helix I, led to successful expression of this chimera that exhibited a KS < 10 microM for SFZ. Systematic replacement of the remaining differing amino acids revealed that two amino acid substitutions in 2C19 (N286S, I289N) confer high-affinity SFZ binding (KS < 5 microM). When combined with a third substitution, E241K, the resulting 2C19 triple mutant exhibited a high cataltyic efficiency for warfarin metabolism with the relaxed stereo- and regiospecificity of 2C19 and a lower KM for (S)-warfarin metabolism (<10 microM) typical of 2C9.
Collapse
Affiliation(s)
- F Jung
- Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, California 92037, USA
| | | | | | | | | | | |
Collapse
|
45
|
Chen L, Khan MA, Richter-Addo GB, Young VG, Powell DR. Synthesis, Characterization, and Solid-State Molecular Structures of Nitrosoarene Complexes of Osmium Porphyrins. Inorg Chem 1998; 37:4689-4696. [PMID: 11670622 DOI: 10.1021/ic980463u] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reactions of (por)Os(CO) (por = TPP, TTP, OEP, TMP) with nitrosoarenes (ArNO; Ar = Ph, o-tol) in refluxing toluene generate the (por)Os(ArNO)(2) complexes in 45-76% yields (TTP = 5,10,15,20-tetra-p-tolylporphyrinato dianion, TPP = 5,10,15,20-tetraphenylporphyrinato dianion, OEP = 2,3,7,8,12,13,17,18-octaethylporphyrinato dianion, TMP = 5,10,15,20-tetramesitylporphyrinato dianion). The nu(NO) of the coordinated PhNO groups in the (por)Os(PhNO)(2) complexes occur in the 1295-1276 cm(-)(1) range, and decrease slightly in the order TPP (1295 cm(-)(1)) > TTP (1291 cm(-)(1)) > OEP (1286 cm(-)(1)) > TMP (1276 cm(-)(1)). The reaction of (TTP)Os(CO) with 1 equiv of PhNO in CH(2)Cl(2) at room temperature generates a 1:3 mixture of (TTP)Os(CO)(PhNO) and (TTP)Os(PhNO)(2) in ca. 40% isolated yield. The nu(CO) of (TTP)Os(CO)(PhNO) is at 1972 cm(-)(1) (KBr), which is 56 cm(-)(1) higher in energy than that of the precursor (TTP)Os(CO). When this mixture and excess PhNO are dissolved in toluene and the solution is heated to reflux, quantitative conversion to the (TTP)Os(PhNO)(2) product occurs. IR monitoring of the reactions of (por)Os(CO) with 1 equiv of PhNO in CH(2)Cl(2) reveal similar formations of the respective (por)Os(CO)(PhNO) intermediates for the TTP (1968 cm(-)(1); Deltanu(CO) = +74 cm(-)(1)), TMP (1966 cm(-)(1); Deltanu(CO) = +63 cm(-)(1)), and OEP (1958 cm(-)(1); Deltanu(CO) = +72 cm(-)(1)) analogues. Five of these (por)Os(ArNO)-containing complexes have been fully characterized by spectroscopic methods and by single-crystal X-ray crystallography. All the nitrosoarene ligands in these complexes are attached to the formally Os(II) centers via an eta(1)-N binding mode.
Collapse
Affiliation(s)
- Li Chen
- X-ray Structural Laboratory, Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, Wisconsin 53706
| | | | | | | | | |
Collapse
|
46
|
Renodon A, Boucher JL, Wu C, Gachhui R, Sari MA, Mansuy D, Stuehr D. Formation of nitric oxide synthase-iron(II) nitrosoalkane complexes: severe restriction of access to the iron(II) site in the presence of tetrahydrobiopterin. Biochemistry 1998; 37:6367-74. [PMID: 9572852 DOI: 10.1021/bi972297s] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Nitric oxide synthases (NOS) are heme proteins, closely related to cytochromes P450, that catalyze oxidation of l-arginine (l-Arg) to nitric oxide (NO) and citrulline. To get further insight into their active site, we have studied the ability of recombinant mouse inducible NOS (iNOS) and rat brain neuronal NOS (nNOS), and of their oxygenase domains (iNOSoxy and nNOSoxy), to form Fe(II)-nitrosoalkane complexes. In the absence of BH4, iNOSoxy, nNOSoxy, and full-length iNOS readily form complexes characterized by Soret peaks around 448 nm, after reaction with various nitroalkanes and sodium dithionite. These complexes displayed physicochemical characteristics very similar to those of previously reported microsomal cytochrome P450-Fe(II)-nitrosoalkane complexes: (i) a Soret peak around 450 nm, (ii) a clear stability in the presence of CO, and (iii) a fast destruction upon oxidation of the iron by ferricyanide. Thus, in the absence of l-Arg and BH4, NOSs Fe(II) appear to be largely opened to even large R-NO ligands with R = cyclohexyl or p-Cl-C6H4-CH2CH(CH3) for instance, in a manner similar to microsomal P450s Fe(II). As expected, the presence of l-Arg inhibits the formation of NOSs Fe(II)-RNO complexes. More surprisingly, the presence of BH4 also strongly inhibits the formation of the NOSs Fe(II) complexes even with the smallest nitrosoalkane ligand, CH3NO (IC50 values of 0.5 and 4 microM for nNOSoxy and iNOSoxy, respectively). Accordingly, recombinant full-length nNOS containing BH4 and l-Arg is completely unable to form Fe(II)-nitrosoalkane complexes, even with CH3NO. These results suggest that, in the absence of l-Arg and BH4, the distal pocket of NOSs Fe(II) is largely opened even to bulky ligands, in a manner similar to that of microsomal cytochromes P450. On the contrary, the distal heme pocket of iNOS and nNOS seems to be closed after binding of l-Arg and BH4, particularly in the Fe(II) state. This results in a highly restricted access for Fe(II) ligands, except very small ones such as CO, NO, and O2. Such effects of BH4 in controlling the size of the distal heme pocket of NOS Fe(II) correspond to a new role of biopterins in biological systems.
Collapse
Affiliation(s)
- A Renodon
- Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, URA 400 CNRS, Université Paris V, 45 Rue des Saints-Pères, 75270 Paris Cedex 06, France
| | | | | | | | | | | | | |
Collapse
|
47
|
Havlin RH, Godbout N, Salzmann R, Wojdelski M, Arnold W, Schulz CE, Oldfield E. An Experimental and Density Functional Theoretical Investigation of Iron-57 Mössbauer Quadrupole Splittings in Organometallic and Heme-Model Compounds: Applications to Carbonmonoxy-Heme Protein Structure. J Am Chem Soc 1998. [DOI: 10.1021/ja972619f] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Robert H. Havlin
- Contribution from the Department of Chemistry, University of Illinois at UrbanaChampaign, 600 South Mathews Avenue, Urbana, Illinois 61801, and Department of Physics, Knox College, 2 East South Street, Galesburg, Illinois 61401
| | - Nathalie Godbout
- Contribution from the Department of Chemistry, University of Illinois at UrbanaChampaign, 600 South Mathews Avenue, Urbana, Illinois 61801, and Department of Physics, Knox College, 2 East South Street, Galesburg, Illinois 61401
| | - Renzo Salzmann
- Contribution from the Department of Chemistry, University of Illinois at UrbanaChampaign, 600 South Mathews Avenue, Urbana, Illinois 61801, and Department of Physics, Knox College, 2 East South Street, Galesburg, Illinois 61401
| | - Mark Wojdelski
- Contribution from the Department of Chemistry, University of Illinois at UrbanaChampaign, 600 South Mathews Avenue, Urbana, Illinois 61801, and Department of Physics, Knox College, 2 East South Street, Galesburg, Illinois 61401
| | - William Arnold
- Contribution from the Department of Chemistry, University of Illinois at UrbanaChampaign, 600 South Mathews Avenue, Urbana, Illinois 61801, and Department of Physics, Knox College, 2 East South Street, Galesburg, Illinois 61401
| | - Charles E. Schulz
- Contribution from the Department of Chemistry, University of Illinois at UrbanaChampaign, 600 South Mathews Avenue, Urbana, Illinois 61801, and Department of Physics, Knox College, 2 East South Street, Galesburg, Illinois 61401
| | - Eric Oldfield
- Contribution from the Department of Chemistry, University of Illinois at UrbanaChampaign, 600 South Mathews Avenue, Urbana, Illinois 61801, and Department of Physics, Knox College, 2 East South Street, Galesburg, Illinois 61401
| |
Collapse
|
48
|
Salzmann R, Wojdelski M, McMahon M, Havlin RH, Oldfield E. A Solid-State Nitrogen-15 Nuclear Magnetic Resonance Spectroscopic and Quantum Chemical Investigation of Nitrosoarene−Metal Interactions in Model Systems and in Heme Proteins. J Am Chem Soc 1998. [DOI: 10.1021/ja971587t] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Renzo Salzmann
- Contribution from the Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801
| | - Mark Wojdelski
- Contribution from the Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801
| | - Michael McMahon
- Contribution from the Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801
| | - Robert H. Havlin
- Contribution from the Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801
| | - Eric Oldfield
- Contribution from the Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801
| |
Collapse
|
49
|
Fox SJ(S, Chen L, Khan MA, Richter-Addo GB. Nitrosoarene Complexes of Manganese Porphyrins. Inorg Chem 1997. [DOI: 10.1021/ic970836b] [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)
- Shelia J. (Schultze) Fox
- Department of Chemistry and Biochemistry, University of Oklahoma, 620 Parrington Oval, Norman, Oklahoma 73019
| | - Li Chen
- Department of Chemistry and Biochemistry, University of Oklahoma, 620 Parrington Oval, Norman, Oklahoma 73019
| | - Masood A. Khan
- Department of Chemistry and Biochemistry, University of Oklahoma, 620 Parrington Oval, Norman, Oklahoma 73019
| | - George B. Richter-Addo
- Department of Chemistry and Biochemistry, University of Oklahoma, 620 Parrington Oval, Norman, Oklahoma 73019
| |
Collapse
|
50
|
Guengerich FP. Role of cytochrome P450 enzymes in drug-drug interactions. ADVANCES IN PHARMACOLOGY (SAN DIEGO, CALIF.) 1997; 43:7-35. [PMID: 9342171 DOI: 10.1016/s1054-3589(08)60200-8] [Citation(s) in RCA: 211] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Many adverse drug-drug interactions are attributable to pharmacokinetic problems and can be understood in terms of alterations of P450-catalyzed reactions. Much is now known about the human P450 enzymes and what they do, and it has been possible to apply this information to issues related to practical problems. A relatively small subset of the total number of human P450s appears to be responsible for a large fraction of the oxidation of drugs. The three major reasons for drug-drug interactions involving the P450s are induction, inhibition, and possibly stimulation, with inhibition appearing to be the most important in terms of known clinical problems. With the available knowledge of human P450s and reagents, it is possible to do in vitro experiments with drugs and make useful predictions. The results can be tested in vivo, again using assays based on our knowledge of human P450s. This approach has the capability of not only improving predictions about which drugs might show serious interaction problems, but also decreasing the number of in vivo interaction studies that must be performed. These approaches should improve with further refinement and technical advances.
Collapse
Affiliation(s)
- F P Guengerich
- Department of Biochemistry and Center in Molecular Toxicology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232-0146, USA
| |
Collapse
|