1
|
Potter JR, Rivera S, Young PG, Patterson DC, Namitz KE, Yennawar N, Kincaid JR, Liu Y, Weinert EE. Heme pocket modulates protein conformation and diguanylate cyclase activity of a tetrameric globin coupled sensor. J Inorg Biochem 2024; 258:112638. [PMID: 38878680 DOI: 10.1016/j.jinorgbio.2024.112638] [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: 03/29/2024] [Revised: 06/04/2024] [Accepted: 06/05/2024] [Indexed: 07/01/2024]
Abstract
Bacteria use the second messenger cyclic dimeric guanosine monophosphate (c-di-GMP) to control biofilm formation and other key phenotypes in response to environmental signals. Changes in oxygen levels can alter c-di-GMP signaling through a family of proteins termed globin coupled sensors (GCS) that contain diguanylate cyclase domains. Previous studies have found that GCS diguanylate cyclase activity is controlled by ligand binding to the heme within the globin domain, with oxygen binding resulting in the greatest increase in catalytic activity. Herein, we present evidence that heme-edge residues control O2-dependent signaling in PccGCS, a GCS protein from Pectobacterium carotovorum, by modulating heme distortion. Using enzyme kinetics, resonance Raman spectroscopy, small angle X-ray scattering, and multi-wavelength analytical ultracentrifugation, we have developed an integrated model of the full-length PccGCS tetramer and have identified conformational changes associated with ligand binding, heme conformation, and cyclase activity. Taken together, these studies provide new insights into the mechanism by which O2 binding modulates activity of diguanylate cyclase-containing GCS proteins.
Collapse
Affiliation(s)
- Jacob R Potter
- Department of Biochemistry and Molecular Biology, Pennsylvania State University, University Park, PA 16802, USA
| | - Shannon Rivera
- Department of Chemistry, Emory University, Atlanta, GA 30322, USA
| | - Paul G Young
- Department of Chemistry, Emory University, Atlanta, GA 30322, USA
| | - Dayna C Patterson
- Department of Chemistry, Pennsylvania State University, University Park, PA 16802, USA
| | - Kevin E Namitz
- Department of Chemistry, Pennsylvania State University, University Park, PA 16802, USA; The Huck Institutes of the Life Sciences, Pennsylvania State University, University Park, PA 16802, USA
| | - Neela Yennawar
- The Huck Institutes of the Life Sciences, Pennsylvania State University, University Park, PA 16802, USA
| | - James R Kincaid
- Department of Chemistry, Marquette University, Milwaukee, WI 53233, USA.
| | - Yilin Liu
- Department of Chemistry, Marquette University, Milwaukee, WI 53233, USA; Department of Chemistry, University of Akron, Akron, OH 44325, USA.
| | - Emily E Weinert
- Department of Biochemistry and Molecular Biology, Pennsylvania State University, University Park, PA 16802, USA; Department of Chemistry, Pennsylvania State University, University Park, PA 16802, USA.
| |
Collapse
|
2
|
Schweitzer-Stenner R. Probing the versatility of cytochrome c by spectroscopic means: A Laudatio on resonance Raman spectroscopy. J Inorg Biochem 2024; 259:112641. [PMID: 38901065 DOI: 10.1016/j.jinorgbio.2024.112641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Revised: 06/03/2024] [Accepted: 06/12/2024] [Indexed: 06/22/2024]
Abstract
Over the last 50 years resonance Raman spectroscopy has become an invaluable tool for the exploration of chromophores in biological macromolecules. Among them, heme proteins and metal complexes have attracted considerable attention. This interest results from the fact that resonance Raman spectroscopy probes the vibrational dynamics of these chromophores without direct interference from the surrounding. However, the indirect influence via through-bond and through-space chromophore-protein interactions can be conveniently probed and analyzed. This review article illustrates this point by focusing on class 1 cytochrome c, a comparatively simple heme protein generally known as electron carrier in mitochondria. The article demonstrates how through selective excitation of resonance Raman active modes information about the ligation, the redox state and the spin state of the heme iron can be obtained from band positions in the Raman spectra. The investigation of intensities and depolarization ratios emerged as tools for the analysis of in-plane and out-of-plane deformations of the heme macrocycle. The article further shows how resonance Raman spectroscopy was used to characterize partially unfolded states of oxidized cytochrome c. Finally, it describes its use for exploring structural changes due to the protein's binding to anionic surfaces like cardiolipin containing membranes.
Collapse
|
3
|
Hall JN, Vicchio SP, Kropf AJ, Delferro M, Bollini P. Can the Rate of a Catalytic Turnover Be Altered by Ligands in the Absence of Direct Binding Interactions? J Am Chem Soc 2024; 146:12113-12129. [PMID: 38647033 DOI: 10.1021/jacs.4c01978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
Second sphere coordination effects ubiquitous in enzymatic catalysis occur through direct interactions, either covalent or non-covalent, with reaction intermediates and transition states. We present herein evidence of indirect second sphere coordination effects in which ligation of water/alkanols far removed from the primary coordination sphere of the active site nevertheless alter energetic landscapes within catalytic redox cycles in the absence of direct physicochemical interactions with surface species mediating catalytic turnovers. Density functional theory, in situ X-ray absorption and infrared spectroscopy, and a wide array of steady-state and transient CO oxidation rate data suggest that the presence of peripheral water renders oxidation half-cycles within two-electron redox cycles over μ3-oxo-bridged trimers in MIL-100(M) more kinetically demanding. Communication between ligated water and the active site appears to occur through the Fe-O-Fe backbone, as inferred from spin density variations on the central μ3-oxygen 'junction'. Evidence is provided for the generality of these second sphere effects in that they influence different types of redox half-cycles or metals, and can be amplified or attenuated through choice of coordinating ligand. Specifically in the case of MIL-100(M) materials, the Cr isostructure can be made to kinetically mimic the Fe variant by disproportionately hindering oxidation half-cycles relative to the reduction half-cycles. Kinetic and spectroscopic inferences presented here significantly expand both the conceptual definition of second sphere effects as well as the palette of synthetic levers available for tuning catalytic redox performance through chemical ligation.
Collapse
Affiliation(s)
- Jacklyn N Hall
- William A. Brookshire Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Stephen P Vicchio
- Department of Chemical and Biomolecular Engineering, Clemson University, Clemson, South Carolina 29634, United States
| | - A Jeremy Kropf
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Massimiliano Delferro
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Praveen Bollini
- William A. Brookshire Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
| |
Collapse
|
4
|
Zhang E, Hirao H. Synergistic Charge Transfer Effect in Ferrous Heme-CO Bonding within Cytochrome P450. Molecules 2024; 29:873. [PMID: 38398625 PMCID: PMC10891957 DOI: 10.3390/molecules29040873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Revised: 02/05/2024] [Accepted: 02/13/2024] [Indexed: 02/25/2024] Open
Abstract
We conducted ab initio valence bond (VB) calculations employing the valence bond self-consistent field (VBSCF) and breathing orbital valence bond (BOVB) methods to investigate the nature of the coordination bonding between ferrous heme and carbon monoxide (CO) within cytochrome P450. These calculations revealed the significant influence exerted by both proximal and equatorial ligands on the π-backdonation effect from the heme to the CO. Moreover, our VB calculations unveiled a phenomenon of synergistic charge transfer (sCT). In the case of ferrous heme-CO bonding, the significant stabilization in this sCT arises from cooperative resonance between the VB structures associated with σ donation and π backdonation. Unlike many other ligands, CO possesses the unique ability to establish two mutually perpendicular π-backdonation orbital interaction pairs, leading to an intensified stabilization attributed to σ-π resonance. Furthermore, while of a smaller energy magnitude, sCT due to one π-π pair is also present, contributing to the differential stabilization of ferrous heme-CO bonding.
Collapse
Affiliation(s)
| | - Hajime Hirao
- Warshel Institute for Computational Biology, School of Medicine, The Chinese University of Hong Kong, Shenzhen 518172, China;
| |
Collapse
|
5
|
Hirao H, Zhang E. Bidirectional Charge Transfer at the Heme Iron in Reversible and Quasi-irreversible Cytochrome P450 Inhibition. Inorg Chem 2023; 62:16599-16608. [PMID: 37737847 DOI: 10.1021/acs.inorgchem.3c02541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Abstract
The coordination bonding between inhibitor ligands and heme iron plays a critical role in disrupting the essential catalytic functions of cytochrome P450 enzymes (P450s). Despite its intrinsic importance and consequential implications for human health, our current understanding of coordination bonding in P450 inhibition remains limited. To address this knowledge gap, we conducted a systematic theoretical analysis of the complexes between a ferric or a ferrous heme model and representative inhibitor ligands. Specifically, we evaluated the charge-transfer (CT) effect within these complexes by employing a series of theoretical methods based on density functional theory (DFT). Through a comprehensive analysis, we unveiled the relative significance of ligand-to-heme forward CT in the ferric and ferrous complexes of reversible inhibitors. In contrast, backward CT dominates over forward CT in the ferrous heme complexes of quasi-irreversible inhibitors. Further analysis using the compact frontier orbital method underscores the elevated electron-accepting abilities of quasi-irreversible inhibitors for π backdonation, which greatly amplifies their binding affinity for the ferrous heme. This study sheds light on the intricate mechanisms underlying P450 inhibition and provides valuable insights for future inhibitor design and development.
Collapse
Affiliation(s)
- Hajime Hirao
- Warshel Institute for Computational Biology, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Shenzhen, Guangdong 518172, P. R. China
| | - Enhua Zhang
- Warshel Institute for Computational Biology, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Shenzhen, Guangdong 518172, P. R. China
| |
Collapse
|
6
|
Jing Y, Usai R, Liu Y, Kincaid JR. Revealing substrate-induced structural changes in active site of human CYP51 in the presence of its physiological substrates. J Inorg Biochem 2023; 242:112167. [PMID: 36870163 PMCID: PMC10082466 DOI: 10.1016/j.jinorgbio.2023.112167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 02/01/2023] [Accepted: 02/20/2023] [Indexed: 02/27/2023]
Abstract
The human sterol 14α-demethylases (CYP51, CYP is an abbreviation for cytochrome P450) catalyze three-step oxidative removal of 14α-methyl group of lanosterol by first forming an alcohol, then an aldehyde, and finally conducting a CC bond cleavage reaction. This present study utilizes a combination of Resonance Raman spectroscopy and Nanodisc technology to probe the active site structure of CYP51 in the presence of its hydroxylase and lyase substrates. Ligand-binding induced partial low-to-high-spin conversion is observed by applying electronic absorption spectroscopy and Resonance Raman (RR) spectroscopy. This low degree of spin conversion of CYP51 is contributed by the retention of the water ligand coordinated to the heme iron as well as direct interaction between the hydroxyl group of lyase substrate and the iron center. No significant changes in active site structure are found between detergent-stabilized CYP51 and nanodisc-incorporated CYP51, nevertheless, it is demonstrated that nanodisc-incorporated assemblies provide much more well-defined active site RR spectroscopic responses, which induces a larger conversion from low-to-high-spin state in presence of the substrates. Moreover, a positive polar environment around the exogenous diatomic ligand is detected, providing insight into the mechanism of this essential CC bond cleavage reaction.
Collapse
Affiliation(s)
- Yuanqi Jing
- Department of Chemistry, Marquette University, Milwaukee, WI 53233, USA
| | - Remigio Usai
- Department of Chemistry, Marquette University, Milwaukee, WI 53233, USA
| | - Yilin Liu
- Department of Chemistry, Marquette University, Milwaukee, WI 53233, USA.
| | - James R Kincaid
- Department of Chemistry, Marquette University, Milwaukee, WI 53233, USA
| |
Collapse
|
7
|
Adams HR, Svistunenko DA, Wilson MT, Fujii S, Strange RW, Hardy ZA, Vazquez PA, Dabritz T, Streblow GJ, Andrew CR, Hough MA. A Heme Pocket Aromatic Quadrupole Modulates Gas Binding to Cytochrome c'-β: Implications for NO Sensors. J Biol Chem 2023:104742. [PMID: 37100286 DOI: 10.1016/j.jbc.2023.104742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 04/15/2023] [Accepted: 04/19/2023] [Indexed: 04/28/2023] Open
Abstract
The structural basis by which gas-binding heme proteins control their interactions with NO, CO, and O2, is fundamental to enzymology, biotechnology and human health. Cytochromes c´ (cyts c´) are a group of putative NO-binding heme proteins that fall into two families: the well characterised four alpha helix bundle fold (cyts c´-α) and an unrelated family with a largely beta sheet fold (cyts c´-β) resembling that of cytochromes P460. A recent structure of cyt c´-β from Methylococcus capsulatus Bath (McCP-β) revealed two heme pocket phenylalanine residues (Phe 32 and Phe 61) positioned near the distal gas binding site. This feature, dubbed the "Phe cap", is highly conserved within the sequences of other cyts c´-β, but is absent in their close homologues, the hydroxylamine oxidizing cytochromes P460, although some do contain a single Phe residue. Here we report an integrated structural, spectroscopic, and kinetic characterization of McCP-β complexes with diatomic gases, focusing on the interaction of the Phe cap with NO and CO. Significantly, crystallographic and resonance Raman data show that orientation of the electron rich aromatic ring face of Phe 32 towards distally-bound NO or CO is associated with weakened backbonding and higher off rates. Moreover, we propose that an aromatic quadrupole also contributes to the unusually weak backbonding reported for some heme-based gas sensors, including the mammalian NO-sensor, soluble guanylate cyclase (sGC). Collectively, this study sheds light on the influence of highly conserved distal Phe residues on heme-gas complexes of cytochrome c'-β, including the potential for aromatic quadrupoles to modulate NO and CO binding in other heme proteins.
Collapse
Affiliation(s)
- Hannah R Adams
- School of Life Sciences, University of Essex, Wivenhoe Park, Colchester, Essex, CO4 3SQ, UK
| | - Dimitri A Svistunenko
- School of Life Sciences, University of Essex, Wivenhoe Park, Colchester, Essex, CO4 3SQ, UK
| | - Michael T Wilson
- School of Life Sciences, University of Essex, Wivenhoe Park, Colchester, Essex, CO4 3SQ, UK
| | - Sotaro Fujii
- Graduate School of Biosphere Science, Hiroshima University, Kagamiyama 1-4-4, Higashi-Hiroshima, Hiroshima, 739-8528, Japan; Diamond Light Source Ltd., Harwell Science and Innovation Campus, Didcot OX11 0DE, UK
| | - Richard W Strange
- School of Life Sciences, University of Essex, Wivenhoe Park, Colchester, Essex, CO4 3SQ, UK
| | - Zoe A Hardy
- Department of Chemistry & Biochemistry, Eastern Oregon University, La Grande OR 97850, USA
| | - Priscilla A Vazquez
- Department of Chemistry & Biochemistry, Eastern Oregon University, La Grande OR 97850, USA
| | - Tyler Dabritz
- Department of Chemistry & Biochemistry, Eastern Oregon University, La Grande OR 97850, USA
| | - Gabriel J Streblow
- Department of Chemistry & Biochemistry, Eastern Oregon University, La Grande OR 97850, USA
| | - Colin R Andrew
- Department of Chemistry & Biochemistry, Eastern Oregon University, La Grande OR 97850, USA.
| | - Michael A Hough
- School of Life Sciences, University of Essex, Wivenhoe Park, Colchester, Essex, CO4 3SQ, UK; Diamond Light Source Ltd., Harwell Science and Innovation Campus, Didcot OX11 0DE, UK.
| |
Collapse
|
8
|
Xie F, Song Y, Yi Y, Jiang X, Ma S, Ma C, Li J, Zhanghuang Z, Liu M, Zhao P, Ma X. Therapeutic Potential of Molecular Hydrogen in Metabolic Diseases from Bench to Bedside. Pharmaceuticals (Basel) 2023; 16:ph16040541. [PMID: 37111299 PMCID: PMC10141176 DOI: 10.3390/ph16040541] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 03/26/2023] [Accepted: 03/29/2023] [Indexed: 04/29/2023] Open
Abstract
Oxidative stress and chronic inflammation have been implicated in the pathophysiology of metabolic diseases, including diabetes mellitus (DM), metabolic syndrome (MS), fatty liver (FL), atherosclerosis (AS), and obesity. Molecular hydrogen (H2) has long been considered a physiologically inert gas. In the last two decades, accumulating evidence from pre-clinical and clinical studies has indicated that H2 may act as an antioxidant to exert therapeutic and preventive effects on various disorders, including metabolic diseases. However, the mechanisms underlying the action of H2 remain unclear. The purpose of this review was to (1) provide an overview of the current research on the potential effects of H2 on metabolic diseases; (2) discuss the possible mechanisms underlying these effects, including the canonical anti-oxidative, anti-inflammatory, and anti-apoptotic effects, as well as suppression of ER stress, activation of autophagy, improvement of mitochondrial function, regulation of gut microbiota, and other possible mechanisms. The potential target molecules of H2 will also be discussed. With more high-quality clinical trials and in-depth mechanism research, it is believed that H2 will eventually be applied to clinical practice in the future, to benefit more patients with metabolic disease.
Collapse
Affiliation(s)
- Fei Xie
- Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
- Beijing Molecular Hydrogen Research Center, Beijing 100124, China
| | - Yifei Song
- Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
- Beijing Molecular Hydrogen Research Center, Beijing 100124, China
| | - Yang Yi
- Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
- Beijing Molecular Hydrogen Research Center, Beijing 100124, China
| | - Xue Jiang
- Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
- Beijing Molecular Hydrogen Research Center, Beijing 100124, China
| | - Shiwen Ma
- Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
- Beijing Molecular Hydrogen Research Center, Beijing 100124, China
| | - Chen Ma
- Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
- Beijing Molecular Hydrogen Research Center, Beijing 100124, China
| | - Junyu Li
- Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
- Beijing Molecular Hydrogen Research Center, Beijing 100124, China
| | - Ziyi Zhanghuang
- Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
- Beijing Molecular Hydrogen Research Center, Beijing 100124, China
| | - Mengyu Liu
- Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
- Beijing Molecular Hydrogen Research Center, Beijing 100124, China
| | - Pengxiang Zhao
- Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
- Beijing Molecular Hydrogen Research Center, Beijing 100124, China
| | - Xuemei Ma
- Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
- Beijing Molecular Hydrogen Research Center, Beijing 100124, China
| |
Collapse
|
9
|
Usai R, Kaluka D, Cai S, Sem DS, Kincaid JR. Solution phase refinement of active site structure using 2D NMR and judiciously 13C-labeled cytochrome P450. J Inorg Biochem 2023; 241:112126. [PMID: 36682280 PMCID: PMC10725731 DOI: 10.1016/j.jinorgbio.2023.112126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 01/07/2023] [Accepted: 01/10/2023] [Indexed: 01/15/2023]
Abstract
The Cytochrome P450 (CYP450) superfamily has been the subject of intense research for over six decades. Here the HU227 strain of E. coli, lacking the δ-aminolevulinic acid (δ-ALA) synthase gene, was employed, along with [5-13C] δ-ALA, in the heterologous expression of P450cam harboring a prosthetic group labeled with 13C at the four methine carbons (Cm) and pyrrole Cα positions. The product was utilized as a proof of principle strategy for defining and refining solution phase active site structure in cytochrome P450cam, providing proton-to-proton distances from 13CmH to protons on bound substrate or nearby amino acid residues, using short mixing time 2D or 3D NOESY-HMQC methods. The results reveal the interesting finding that 2D 13C-filtered NOESY-HMQC can be used to obtain distances between protons on labeled 13C to positions of protons nearby in the active site, confirming the utility of this NMR-based approach to probing active site structure under physiological conditions. Such 13C-heme-filtered NOE data complement X-ray crystallographic and T1-based NMR measurements; and, may also be of potentially significant utility in furnishing experimental distance constraints in validations of docking routines commonly employed for determining the relative affinities and binding orientations of drug candidates with CYP450s.
Collapse
Affiliation(s)
- Remigio Usai
- Department of Chemistry, Marquette University, Wisconsin 53233, United States
| | - Daniel Kaluka
- Department of Chemistry and Biochemistry, Taylor University, Upland, IN 46989, United States
| | - Sheng Cai
- School of Pharmacy, University of Wisconsin Madison, Madison, Wisconsin 53705, United States
| | - Daniel S. Sem
- Department of Pharmaceutical Sciences, Concordia University of Wisconsin, Mequon, WI, 53097, United States
| | - James R. Kincaid
- Department of Chemistry, Marquette University, Wisconsin 53233, United States
| |
Collapse
|
10
|
Snyder SN, Chiura T, Mak PJ. Resonance Raman Characterization of O 2-Binding Heme Proteins. Methods Mol Biol 2023; 2648:27-41. [PMID: 37039983 DOI: 10.1007/978-1-0716-3080-8_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
Abstract
A vast array of critical in vivo processes and pathways are dependent on a multitude of O2-binding heme proteins which contain a diverse range of functions. Resonance Raman (rR) spectroscopy is an ideal technique for structural investigation of these proteins, providing information about the geometry of the Fe-O-O fragment and its electrostatic interactions with the distal active site. Characterization of these oxy adducts is an endeavor that is complicated by their instability for many heme proteins in solution, an obstacle which can be overcome by applying the rR technique to cryogenically frozen samples. We describe here how to measure rR spectra of heme proteins with stable oxy forms, as well as the technical adaptations required to measure unstable samples at 77 K.
Collapse
Affiliation(s)
- Samuel N Snyder
- Department of Chemistry, Saint Louis University, Saint Louis, MO, USA
| | - Tapiwa Chiura
- Department of Chemistry, Saint Louis University, Saint Louis, MO, USA
| | - Piotr J Mak
- Department of Chemistry, Saint Louis University, Saint Louis, MO, USA.
| |
Collapse
|
11
|
Moura RT, Quintano M, Antonio JJ, Freindorf M, Kraka E. Automatic Generation of Local Vibrational Mode Parameters: From Small to Large Molecules and QM/MM Systems. J Phys Chem A 2022; 126:9313-9331. [DOI: 10.1021/acs.jpca.2c07871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Renaldo T. Moura
- Computational and Theoretical Chemistry Group (CATCO), Department of Chemistry, Southern Methodist University, 3215 Daniel Avenue, Dallas, Texas75275-0314, United States
- Department of Chemistry and Physics Center of Agrarian Sciences, Federal University of Paraiba, Areia, PB58397-000, Brazil
| | - Mateus Quintano
- Computational and Theoretical Chemistry Group (CATCO), Department of Chemistry, Southern Methodist University, 3215 Daniel Avenue, Dallas, Texas75275-0314, United States
| | - Juliana J. Antonio
- Computational and Theoretical Chemistry Group (CATCO), Department of Chemistry, Southern Methodist University, 3215 Daniel Avenue, Dallas, Texas75275-0314, United States
| | - Marek Freindorf
- Computational and Theoretical Chemistry Group (CATCO), Department of Chemistry, Southern Methodist University, 3215 Daniel Avenue, Dallas, Texas75275-0314, United States
| | - Elfi Kraka
- Computational and Theoretical Chemistry Group (CATCO), Department of Chemistry, Southern Methodist University, 3215 Daniel Avenue, Dallas, Texas75275-0314, United States
| |
Collapse
|
12
|
Kraka E, Quintano M, La Force HW, Antonio JJ, Freindorf M. The Local Vibrational Mode Theory and Its Place in the Vibrational Spectroscopy Arena. J Phys Chem A 2022; 126:8781-8798. [DOI: 10.1021/acs.jpca.2c05962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Elfi Kraka
- Computational and Theoretical Chemistry Group (CATCO), Department of Chemistry, Southern Methodist University, 3215 Daniel Ave, Dallas, Texas75275-0314, United States
| | - Mateus Quintano
- Computational and Theoretical Chemistry Group (CATCO), Department of Chemistry, Southern Methodist University, 3215 Daniel Ave, Dallas, Texas75275-0314, United States
| | - Hunter W. La Force
- Computational and Theoretical Chemistry Group (CATCO), Department of Chemistry, Southern Methodist University, 3215 Daniel Ave, Dallas, Texas75275-0314, United States
| | - Juliana J. Antonio
- Computational and Theoretical Chemistry Group (CATCO), Department of Chemistry, Southern Methodist University, 3215 Daniel Ave, Dallas, Texas75275-0314, United States
| | - Marek Freindorf
- Computational and Theoretical Chemistry Group (CATCO), Department of Chemistry, Southern Methodist University, 3215 Daniel Ave, Dallas, Texas75275-0314, United States
| |
Collapse
|
13
|
Shang S, Yang C, Sun M, Tao Z, Hanif A, Gu Q, Shang J. CO2 capture from wet flue gas using transition metal inserted porphyrin-based metal-organic frameworks as efficient adsorbents. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
14
|
Liu S, Xia S, Yue D, Sun H, Hirao H. The Bonding Nature of Fe–CO Complexes in Heme Proteins. Inorg Chem 2022; 61:17494-17504. [DOI: 10.1021/acs.inorgchem.2c02387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Shuyang Liu
- Warshel Institute for Computational Biology, School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong518172, P. R. China
| | - Songyan Xia
- Warshel Institute for Computational Biology, School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong518172, P. R. China
| | - Dongxiao Yue
- Warshel Institute for Computational Biology, School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong518172, P. R. China
| | - Haoran Sun
- Warshel Institute for Computational Biology, School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong518172, P. R. China
| | - Hajime Hirao
- Warshel Institute for Computational Biology, School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong518172, P. R. China
| |
Collapse
|
15
|
Tumbic GW, Li J, Jiang T, Hossan MY, Feng C, Thielges MC. Interdomain Interactions Modulate the Active Site Dynamics of Human Inducible Nitric Oxide Synthase. J Phys Chem B 2022; 126:6811-6819. [PMID: 36056879 PMCID: PMC10110350 DOI: 10.1021/acs.jpcb.2c04091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Nitric oxide synthase (NOS) is a homodimeric flavohemoprotein responsible for catalyzing the oxidation of l-arginine (l-Arg) to citrulline and nitric oxide. Electrons are supplied for the reaction via interdomain electron transfer between an N-terminal heme-containing oxygenase domain and a FMN-containing (sub)domain of a C-terminal reductase domain. Extensive attention has focused on elucidating how conformational dynamics regulate electron transfer between the domains. Here we investigate the impact of the interdomain FMN-heme interaction on the heme active site dynamics of inducible NOS (iNOS). Steady state linear and time-resolved two-dimensional infrared (2D IR) spectroscopy was applied to probe a CO ligand at the heme within the oxygenase domain for full-length and truncated or mutated constructs of human iNOS. Whereas the linear IR spectra of the CO ligand were identical among the constructs, 2D IR spectroscopy revealed variation in the frequency dynamics. The wild-type constructs that can properly form the FMN/oxygenase docked state due to the presence of both the FMN and oxygenase domains showed slower dynamics than the oxygenase domain alone. Introduction of the mutation (E546N) predicted to perturb electrostatic interactions between the domains resulted in measured dynamics intermediate between those for the full-length and individual oxygenase domain, consistent with perturbation to the docked/undocked equilibrium. These results indicate that docking of the FMN domain to the oxygenase domain not only brings the FMN cofactor within electron transfer distance of the heme domain but also modulates the dynamics sensed by the CO ligand within the active site in a way expected to promote efficient electron transfer.
Collapse
Affiliation(s)
- Goran W Tumbic
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Jinghui Li
- Department of Pharmaceutical Sciences, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Ting Jiang
- Department of Pharmaceutical Sciences, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Md Yeathad Hossan
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Changjian Feng
- Department of Pharmaceutical Sciences, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Megan C Thielges
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| |
Collapse
|
16
|
Freindorf M, Delgado AAA, Kraka E. CO bonding in hexa‐ and pentacoordinate carboxy‐neuroglobin: A quantum mechanics/molecular mechanics and local vibrational mode study. J Comput Chem 2022. [DOI: 10.1002/jcc.26973] [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]
Affiliation(s)
- Marek Freindorf
- Department of Chemistry Southern Methodist University Dallas Texas USA
| | | | - Elfi Kraka
- Department of Chemistry Southern Methodist University Dallas Texas USA
| |
Collapse
|
17
|
Liu Y, Denisov I, Gregory M, Sligar SG, Kincaid JR. Importance of Asparagine 202 in Manipulating Active Site Structure and Substrate Preference for Human CYP17A1. Biochemistry 2022; 61:583-594. [PMID: 35287432 PMCID: PMC9972851 DOI: 10.1021/acs.biochem.2c00023] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The multifunctional cytochrome P450 17A1 (CYP17A1) plays a crucial role in human steroid hormone synthesis (UniProtKB─P05093). It first carries out standard monooxygenase chemistry, converting pregnenolone (PREG) and progesterone (PROG) into 17OH-PREG and 17OH-PROG, utilizing a "Compound I" to initiate hydrogen abstraction and radical recombination in the classic "oxygen rebound" mechanism. Additionally, these hydroxylated products also serve as substrates in a second oxidative cycle which cleaves the 17-20 carbon-carbon bond to form dehydroepiandrosterone and androstenedione, which are key precursors in the generation of powerful androgens and estrogens. Interestingly, in humans, with 17OH-PREG, this so-called lyase reaction is more efficient than with 17OH-PROG, based on Kcat/Km values. In the present work, the asparagine residue at 202 position was replaced by serine, an alteration which can affect substrate orientation and control substrate preference for the lyase reaction. First, we report studies of solvent isotope effects for the N202S CYP17A1 mutant in the presence of 17OH-PREG and 17OH-PROG, which suggest that the ferric peroxo species is the predominant catalytically active intermediate in the lyase step. This conclusion is further supported by employing a combination of cryoradiolysis and resonance Raman techniques to successfully trap and structurally characterize the key reaction intermediates, including the peroxo, the hydroperoxo, and the crucial peroxo-hemiketal intermediate. Collectively, these studies show that the mutation causes active site structural changes that alter the H-bonding interactions with the key Fe-O-O fragment and the degree of protonation of the reactive ferric peroxo intermediate, thereby impacting lyase efficiency.
Collapse
Affiliation(s)
- Yilin Liu
- Department of Chemistry, Marquette University, Milwaukee, Wisconsin 53233, United States
| | - Ilia Denisov
- Departments of Chemistry and Biochemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Michael Gregory
- Departments of Chemistry and Biochemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Stephen G Sligar
- Departments of Chemistry and Biochemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - James R Kincaid
- Department of Chemistry, Marquette University, Milwaukee, Wisconsin 53233, United States
| |
Collapse
|
18
|
Foley EL, Hvitved AN, Eich RF, Olson JS. Mechanisms of nitric oxide reactions with Globins using mammalian myoglobin as a model system. J Inorg Biochem 2022; 233:111839. [DOI: 10.1016/j.jinorgbio.2022.111839] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 04/13/2022] [Accepted: 04/16/2022] [Indexed: 12/15/2022]
|
19
|
Venegas R, Zúñiga C, Zagal J, Toro A, Marco JF, Menendez N, Muñoz-Becerra K, Recio FJ. Pyrolyzed Fe‐N‐C catalysts templated by Fe3O4 nanoparticles. Understanding the role of N‐functions and Fe3C on the ORR activity and mechanism. ChemElectroChem 2022. [DOI: 10.1002/celc.202200115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - César Zúñiga
- University of Santiago de Chile: Universidad de Santiago de Chile Departamento de Química de los Materiales CHILE
| | - Jose Zagal
- Universidad de Santiago de Chile Departamento de Química de los Materiales CHILE
| | - Alejandro Toro
- Pontifical Catholic University of Chile: Pontificia Universidad Catolica de Chile Química Física CHILE
| | - Jose F. Marco
- Instituto de Química Física Rocasolano: Instituto de Quimica Fisica Rocasolano Sistemas de baja dimensionalidad, superficies y materia condensada SPAIN
| | - Nieves Menendez
- Universidad Autonoma de Madrid - Campus de Cantoblanco: Universidad Autonoma de Madrid Química Física Aplicada SPAIN
| | - Karina Muñoz-Becerra
- Universidad Bernardo O'Higgins Centro Integrativo de Biología y Química Aplicada CHILE
| | - Francisco Javier Recio
- Universidad Autonoma de Madrid - Campus de Cantoblanco: Universidad Autonoma de Madrid Química Física Aplicada Calle Tomás y ValienteCampus de Cantoblanco 28040 Madrid SPAIN
| |
Collapse
|
20
|
Fateminasab F, de la Lande A, Omidyan R. Insights into the effect of distal histidine and water hydrogen bonding on NO ligation to ferrous and ferric heme: a DFT study. RSC Adv 2022; 12:4703-4713. [PMID: 35425484 PMCID: PMC8981399 DOI: 10.1039/d1ra08398h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 01/30/2022] [Indexed: 11/29/2022] Open
Abstract
The effect of distal histidine on ligation of NO to ferrous and ferric-heme, has been investigated with the high-level density functional theoretical (DFT) method. It has been predicted that the distal histidine significantly stabilizes the interaction of NO ferrous-heme (by −2.70 kcal mol−1). Also, water hydrogen bonding is quite effective in strengthening the Fe–NO bond in ferrous heme. In contrast in ferric heme, due to the large distance between the H2O and O(NO) and lack of hydrogen bonding, the distal histidine exhibits only a slight effect on the binding of NO to the ferric analogue. Concerning the bond nature of FeII–NO and FeIII–NO in heme, a QTAIM analysis predicts a partially covalent and ionic bond nature in both systems. The effect of distal histidine on ligation of NO to ferrous and ferric-heme, has been investigated with the high-level density functional theoretical (DFT) method.![]()
Collapse
Affiliation(s)
- Fatemeh Fateminasab
- Department of Chemistry, University of Isfahan 81746-73441 Isfahan Iran +98 31 3668 9732
| | - Aurelien de la Lande
- Université Paris-Saclay, CNRS, Institut de Chimie Physique, UMR8000 91405 Orsay France
| | - Reza Omidyan
- Department of Chemistry, University of Isfahan 81746-73441 Isfahan Iran +98 31 3668 9732
| |
Collapse
|
21
|
Singha A, Mittra K, Dey A. Synthetic heme dioxygen adducts: electronic structure and reactivity. TRENDS IN CHEMISTRY 2022. [DOI: 10.1016/j.trechm.2021.10.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
|
22
|
Fujiyama K, Hino T, Nagano S. Diverse reactions catalyzed by cytochrome P450 and biosynthesis of steroid hormone. Biophys Physicobiol 2022; 19:e190021. [PMID: 35859988 PMCID: PMC9260165 DOI: 10.2142/biophysico.bppb-v19.0021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 05/30/2022] [Indexed: 12/01/2022] Open
Abstract
Steroid hormones modulate numerous physiological processes in various higher organisms. Research on the physiology, biosynthesis, and metabolic degradation of steroid hormones is crucial for developing drugs, agrochemicals, and anthelmintics. Most steroid hormone biosynthetic pathways, excluding those in insects, have been elucidated, and the roles of several cytochrome P450s (CYPs, P450s), heme (iron protoporphyrin IX)-containing monooxygenases, have been identified. Specifically, P450s of the animal steroid hormone biosynthetic pathways and their three dimensional structures and reaction mechanisms have been extensively studied; however, the mechanisms of several uncommon P450 reactions involved in animal steroid hormone biosynthesis and structures and reaction mechanisms of various P450s involved in plant and insect steroid hormone biosynthesis remain unclear. Recently, we determined the crystal structure of P450 responsible for the first and rate-determining step in brassinosteroids biosynthesis and clarified the regio- and stereo-selectivity in the hydroxylation reaction mechanism. In this review, we have outlined the general catalytic cycle, reaction mechanism, and structure of P450s. Additionally, we have described the recent advances in research on the reaction mechanisms of steroid hormone biosynthesis-related P450s, some of which catalyze unusual P450 reactions including C–C bond cleavage reactions by utilizing either a heme–peroxo anion species or compound I as an active oxidizing species. This review article is an extended version of the Japanese article, Structure and mechanism of cytochrome P450s involved in steroid hormone biosynthesis, published in SEIBUTSU BUTSURI Vol. 61, p. 189–191 (2021).
Collapse
Affiliation(s)
- Keisuke Fujiyama
- Dormancy and Adaptation Research Unit, RIKEN Center for Sustainable Resource Science
| | - Tomoya Hino
- Center for Research on Green Sustainable Chemistry, Tottori University
| | - Shingo Nagano
- Center for Research on Green Sustainable Chemistry, Tottori University
| |
Collapse
|
23
|
Amadei A, Aschi M. Stationary and Time-Dependent Carbon Monoxide Stretching Mode Features in Carboxy Myoglobin: A Theoretical-Computational Reappraisal. J Phys Chem B 2021; 125:13624-13634. [PMID: 34904432 DOI: 10.1021/acs.jpcb.1c05815] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The stationary and time-dependent infrared spectrum (IR) of the CO stretching mode (νCO) in carboxymyoglobin (MbCO), a longstanding problem of biophysical chemistry, has been modeled through a theoretical-computational method specifically designed for simulating quantum observables in complex atomic-molecular systems and based on a combined application of long time scale molecular dynamics simulations and quantum-chemical calculations. This study is basically focused on two aspects: (i) the origin of the stationary IR substates (termed as A0, A1, and A3) and (ii) the modeling and the interpretation of the νCO energy relaxation. The results, strengthened by a more than satisfactory agreement with the experimental data, concisely indicate that (i) the conformational His64-FeCO relevant substates, i.e., characterized by the formation-disruption of the H-bond between the above moieties, are the main responsible of the presence of two distinct and well separated (A0 and A1/A3) spectroscopic regions; (ii) the characteristic bimodal shape of the A1/A3 spectral region, according to our model, is the result of the fluctuation of the electric field pattern as provided by the protein-solvent framework perturbing the bound His64-CO-Heme complex; and (iii) the electric field pattern, in conjunction with the relatively high density of MbCO vibrational states, is also the main determinant of the νCO energy relaxation, characterizing its kinetic efficiency.
Collapse
Affiliation(s)
- Andrea Amadei
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma "Tor Vergata", via della Ricerca Scientifica 1, 00 133 Roma, Italia
| | - Massimiliano Aschi
- Dipartimento di Scienze Fisiche e Chimiche, Università de l'Aquila, via Vetoio (Coppito 1), 67 010 l'Aquila, Italia
| |
Collapse
|
24
|
Fateminasab F, Aarabi M, de la Lande A, Omidyan R. Theoretical insights on the effect of environments on binding of CO to the Heme :Ferrous and Ferric systems. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
25
|
Gout J, Meuris F, Desbois A, Dorlet P. In vitro coordination of Fe-protoheme with amyloid β is non-specific and exhibits multiple equilibria. J Inorg Biochem 2021; 227:111664. [PMID: 34955310 DOI: 10.1016/j.jinorgbio.2021.111664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Revised: 10/20/2021] [Accepted: 11/02/2021] [Indexed: 10/19/2022]
Abstract
In addition to copper and zinc, heme is thought to play a role in Alzheimer's disease and its metabolism is strongly affected during the course of this disease. Amyloid β, the peptide associated with Alzheimer's disease, was shown to bind heme in vitro with potential catalytic activity linked to oxidative stress. To date, there is no direct determination of the structure of this complex. In this work, we studied the binding mode of heme to amyloid β in different conditions of pH and redox state by using isotopically labelled peptide in combination with advanced magnetic and vibrational spectroscopic methods. Our results show that the interaction between heme and amyloid β leads to a variety of species in equilibrium. The formation of these species seems to depend on many factors suggesting that the binding site is neither very strong nor highly specific. In addition, our data do not support the currently accepted model where a water molecule is bound to the ferric heme as sixth ligand. They also exclude structural models mimicking a peroxidatic site in the amyloid β-Fe-protoheme complexes.
Collapse
Affiliation(s)
- Jérôme Gout
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), Laboratoire Stress Oxydant et Détoxication, Gif-sur-Yvette, France
| | - Floriane Meuris
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), Laboratoire Stress Oxydant et Détoxication, Gif-sur-Yvette, France
| | - Alain Desbois
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), Laboratoire Stress Oxydant et Détoxication, Gif-sur-Yvette, France.
| | - Pierre Dorlet
- CNRS, Aix-Marseille Université, BIP, IMM, Marseille, France; Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), Laboratoire Stress Oxydant et Détoxication, Gif-sur-Yvette, France.
| |
Collapse
|
26
|
Gautam M, Tanaka S, Sekiguchi A, Nakajima Y. Long-Range Metal–Ligand Cooperation by Iron Hydride Complexes Bearing a Phenanthroline-Based Tetradentate PNNP Ligand. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00507] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Monika Gautam
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
- Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennoudai,Tsukuba, Ibaraki 305-8577, Japan
| | - Shinji Tanaka
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Akira Sekiguchi
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Yumiko Nakajima
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
- Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennoudai,Tsukuba, Ibaraki 305-8577, Japan
| |
Collapse
|
27
|
Liu Y, Grinkova Y, Gregory MC, Denisov IG, Kincaid JR, Sligar SG. Mechanism of the Clinically Relevant E305G Mutation in Human P450 CYP17A1. Biochemistry 2021; 60:3262-3271. [PMID: 34662099 PMCID: PMC8822902 DOI: 10.1021/acs.biochem.1c00282] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Steroid metabolism in humans originates from cholesterol and involves several enzyme reactions including dehydrogenation, hydroxylation, and carbon-carbon bond cleavage that occur at regio- and stereo-specific points in the four-membered ring structure. Cytochrome P450s occur at critical junctions that control the production of the male sex hormones (androgens), the female hormones (estrogens) as well as the mineralocorticoids and glucocorticoids. An important branch point in human androgen production is catalyzed by cytochrome P450 CYP17A1 and involves an initial Compound I-mediated hydroxylation at the 17-position of either progesterone (PROG) or pregnenolone (PREG) to form 17-hydroxy derivatives, 17OH-PROG and 17OH-PREG, with approximately similar efficiencies. Subsequent processing of the 17-hydroxy substrates involves a C17-C20 bond scission (lyase) activity that is heavily favored for 17OH-PREG in humans. The mechanism for this lyase reaction has been debated for several decades, some workers favoring a Compound I-mediated process, with others arguing that a ferric peroxo- is the active oxidant. Mutations in CYP17A1 can have profound clinical manifestations. For example, the replacement of the glutamic acid side with a glycine chain at position 305 in the CYP17A1 structure causes a clinically relevant steroidopathy; E305G CYP17A1 displays a dramatic decrease in the production of dehydroepiandrosterone from pregnenolone but surprisingly increases the activity of the enzyme toward the formation of androstenedione from progesterone. To better understand the functional consequences of this mutation, we self-assembled wild-type and the E305G mutant of CYP17A1 into nanodiscs and examined the detailed catalytic mechanism. We measured substrate binding, spin state conversion, and solvent isotope effects in the hydroxylation and lyase pathways for these substrates. Given that, following electron transfer, the ferric peroxo- species is the common intermediate for both mechanisms, we used resonance Raman spectroscopy to monitor the positioning of important hydrogen-bonding interactions of the 17-OH group with the heme-bound peroxide. We discovered that the E305G mutation changes the orientation of the lyase substrate in the active site, which alters a critical hydrogen bonding of the 17-alcohol to the iron-bound peroxide. The observed switch in substrate specificity of the enzyme is consistent with this result if the hydrogen bonding to the proximal peroxo oxygen is necessary for a proposed nucleophilic peroxoanion-mediated mechanism for CYP17A1 in carbon-carbon bond scission.
Collapse
Affiliation(s)
- Yilin Liu
- Department of Chemistry, Marquette University, 1414W Clybourn Street, Milwaukee, Wisconsin 53233, United States
| | | | | | | | - James R Kincaid
- Department of Chemistry, Marquette University, 1414W Clybourn Street, Milwaukee, Wisconsin 53233, United States
| | | |
Collapse
|
28
|
Ledray AP, Mittra K, Green MT. NRVS investigation of ascorbate peroxidase compound II: Observation of Iron(IV)oxo stretching. J Inorg Biochem 2021; 224:111548. [PMID: 34481347 DOI: 10.1016/j.jinorgbio.2021.111548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 07/07/2021] [Accepted: 07/13/2021] [Indexed: 11/18/2022]
Abstract
The protonation state of ascorbate peroxidase compound II (APX-II) has been a subject of debate. A combined X-ray/neutron crystallographic study reported that APX-II is best described as an iron(IV)hydroxide species with an FeO distance of 1.88 Å (Kwon, et al. Nat Commun2016, 7, 13,445), while X-ray absorption spectroscopy (XAS) experiments (utilizing extended X-ray absorption fine structure (EXAFS) and pre-edge analyses) indicate APX-II is an authentic iron(IV)oxo species with an FeO distance 1.68 Å (Ledray, et al. Journal of the American Chemical Society2020,142, 20,419). Previous debates concerning ferryl protonation states have been resolved through the application of Badger's rule, which correlates FeO bond distances with FeO vibrational frequencies. To obtain the required vibrational data, we have collected Nuclear Resonance Vibrational Spectroscopy (NRVS) data for APX-II. We observe a broad vibrational feature in the range associated with iron(IV)oxo stretching (700-800 cm-1). This feature appears to have two peaks at 732 cm-1 and 770 cm-1, corresponding to FeO distances of 1.69 and 1.67 Å, respectively. The broad vibrational envelope and the presence of multiple resonances could reflect a distribution of hydrogen bonding interactions within the active-site pocket.
Collapse
Affiliation(s)
- Aaron P Ledray
- Department of Chemistry, University of California, Irvine, CA 92697, USA; Department of Molecular Biology and Biochemistry, University of California, Irvine, CA 92697, USA
| | - Kaustuv Mittra
- Department of Chemistry, University of California, Irvine, CA 92697, USA; Department of Molecular Biology and Biochemistry, University of California, Irvine, CA 92697, USA
| | - Michael T Green
- Department of Chemistry, University of California, Irvine, CA 92697, USA; Department of Molecular Biology and Biochemistry, University of California, Irvine, CA 92697, USA.
| |
Collapse
|
29
|
Shafizadeh N, Crestoni ME, de la Lande A, Soep B. Heme ligation in the gas phase. INT REV PHYS CHEM 2021. [DOI: 10.1080/0144235x.2021.1952006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | - Maria Elisa Crestoni
- Dipartimento di Chimica e Tecnologie del Farmaco, Università di Roma “La Sapienza”, Roma, Italy
| | | | - Benoît Soep
- ISMO-CNRS, Université Paris Saclay, Orsay Cedex, France
| |
Collapse
|
30
|
Hua X, Wang Z, Wang Z, Chen L, Zhou Z, Ouyang J, Deng K, Yang X, Huang H. De Novo Development of a Universal Biosensing Platform by Rapid Direct Native Protein Modification. Anal Chem 2021; 93:5291-5300. [PMID: 33734672 DOI: 10.1021/acs.analchem.1c00341] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An innovative biosensing assay was developed for simplified, cost-effective, and sensitive detection. By rapid, direct treatment of target proteins with iron porphyrin (TPPFe) in situ, a carboxyl group of amino acid conjugates with an Fe atom of the TPPFe molecule, forming a stable protein complex. We have shown that this complex not only maintains the integrity and functions of original proteins but also acquires peroxidase activity that can turn TMB to a comparably visible signal like that in ELISA. This study is unique since such conversion is difficult to achieve with standard chemical modification or molecular biology methods. In addition, the proposed immunoassay is superior to traditional ELISA as it eliminates an expensive and complicated cross-linking process of an enzyme-labeled antibody. From a practical point of view, we extended this assay to rapid detection of clinically relevant proteins and glucose in blood samples. The results show that this simple immunoassay provides clinical diagnosis, food safety, and environmental monitoring in an easy-to-implement manner.
Collapse
Affiliation(s)
- Xinyi Hua
- Key Laboratory of Theoretical Organic Chemistry and Function Molecule, Ministry of Education, Hunan University of Science and Technology, Xiangtan 411201, China.,Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Zhifang Wang
- Key Laboratory of Theoretical Organic Chemistry and Function Molecule, Ministry of Education, Hunan University of Science and Technology, Xiangtan 411201, China.,Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Ziqi Wang
- Key Laboratory of Theoretical Organic Chemistry and Function Molecule, Ministry of Education, Hunan University of Science and Technology, Xiangtan 411201, China.,Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Linlin Chen
- Key Laboratory of Theoretical Organic Chemistry and Function Molecule, Ministry of Education, Hunan University of Science and Technology, Xiangtan 411201, China.,Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Zaichun Zhou
- Key Laboratory of Theoretical Organic Chemistry and Function Molecule, Ministry of Education, Hunan University of Science and Technology, Xiangtan 411201, China.,Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Junlin Ouyang
- School of Computer Science and Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Keqin Deng
- Key Laboratory of Theoretical Organic Chemistry and Function Molecule, Ministry of Education, Hunan University of Science and Technology, Xiangtan 411201, China.,Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Xiumei Yang
- Key Laboratory of Theoretical Organic Chemistry and Function Molecule, Ministry of Education, Hunan University of Science and Technology, Xiangtan 411201, China.,Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Haowen Huang
- Key Laboratory of Theoretical Organic Chemistry and Function Molecule, Ministry of Education, Hunan University of Science and Technology, Xiangtan 411201, China.,Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
| |
Collapse
|
31
|
Traore ES, Li J, Chiura T, Geng J, Sachla AJ, Yoshimoto F, Eichenbaum Z, Davis I, Mak PJ, Liu A. Heme Binding to HupZ with a C-Terminal Tag from Group A Streptococcus. Molecules 2021; 26:549. [PMID: 33494451 PMCID: PMC7865249 DOI: 10.3390/molecules26030549] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 01/14/2021] [Accepted: 01/16/2021] [Indexed: 12/23/2022] Open
Abstract
HupZ is an expected heme degrading enzyme in the heme acquisition and utilization pathway in Group A Streptococcus. The isolated HupZ protein containing a C-terminal V5-His6 tag exhibits a weak heme degradation activity. Here, we revisited and characterized the HupZ-V5-His6 protein via biochemical, mutagenesis, protein quaternary structure, UV-vis, EPR, and resonance Raman spectroscopies. The results show that the ferric heme-protein complex did not display an expected ferric EPR signal and that heme binding to HupZ triggered the formation of higher oligomeric states. We found that heme binding to HupZ was an O2-dependent process. The single histidine residue in the HupZ sequence, His111, did not bind to the ferric heme, nor was it involved with the weak heme-degradation activity. Our results do not favor the heme oxygenase assignment because of the slow binding of heme and the newly discovered association of the weak heme degradation activity with the His6-tag. Altogether, the data suggest that the protein binds heme by its His6-tag, resulting in a heme-induced higher-order oligomeric structure and heme stacking. This work emphasizes the importance of considering exogenous tags when interpreting experimental observations during the study of heme utilization proteins.
Collapse
Affiliation(s)
- Ephrahime S. Traore
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, TX 78249, USA; (E.S.T.); (J.L.); (F.Y.); (I.D.)
| | - Jiasong Li
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, TX 78249, USA; (E.S.T.); (J.L.); (F.Y.); (I.D.)
| | - Tapiwa Chiura
- Department of Chemistry, Saint Louis University, St. Louis, MO 63103, USA;
| | - Jiafeng Geng
- Department of Chemistry, Georgia State University, Atlanta, GA 30302, USA;
| | - Ankita J. Sachla
- Department of Biology, Georgia State University, Atlanta, GA 30302, USA; (A.J.S.); (Z.E.)
| | - Francis Yoshimoto
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, TX 78249, USA; (E.S.T.); (J.L.); (F.Y.); (I.D.)
| | - Zehava Eichenbaum
- Department of Biology, Georgia State University, Atlanta, GA 30302, USA; (A.J.S.); (Z.E.)
| | - Ian Davis
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, TX 78249, USA; (E.S.T.); (J.L.); (F.Y.); (I.D.)
- Department of Chemistry, Georgia State University, Atlanta, GA 30302, USA;
| | - Piotr J. Mak
- Department of Chemistry, Saint Louis University, St. Louis, MO 63103, USA;
| | - Aimin Liu
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, TX 78249, USA; (E.S.T.); (J.L.); (F.Y.); (I.D.)
- Department of Chemistry, Georgia State University, Atlanta, GA 30302, USA;
| |
Collapse
|
32
|
Ly KH, Weidinger IM. Understanding active sites in molecular (photo)electrocatalysis through complementary vibrational spectroelectrochemistry. Chem Commun (Camb) 2021; 57:2328-2342. [DOI: 10.1039/d0cc07376h] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Highlighting vibrational spectroelectrochemistry for the investigation of synthetic molecular (photo) electrocatalysts for key energy conversion reactions.
Collapse
Affiliation(s)
- Khoa H. Ly
- Lehrstuhl für Elektrochemie
- Fakultät für Chemie und Lebensmittelchemie
- Technische Universität Dresden
- Andreas-Schubert-Bau
- Zellescher Weg 19
| | - Inez M. Weidinger
- Lehrstuhl für Elektrochemie
- Fakultät für Chemie und Lebensmittelchemie
- Technische Universität Dresden
- Andreas-Schubert-Bau
- Zellescher Weg 19
| |
Collapse
|
33
|
Liu Y, Denisov IG, Grinkova YV, Sligar SG, Kincaid JR. P450 CYP17A1 Variant with a Disordered Proton Shuttle Assembly Retains Peroxo‐Mediated Lyase Efficiency. Chemistry 2020; 26:16846-16852. [DOI: 10.1002/chem.202003181] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Indexed: 11/07/2022]
Affiliation(s)
- Yilin Liu
- Department of Chemistry Marquette University 1414W Clybourn Street Milwaukee WI 53233 USA
| | - Ilia G. Denisov
- Departments of Biochemistry and Chemistry University of Illinois 116 Morrill Hall 505 S. Goodwin Avenue Urbana IL 61801 USA
| | - Yelena V. Grinkova
- Departments of Biochemistry and Chemistry University of Illinois 116 Morrill Hall 505 S. Goodwin Avenue Urbana IL 61801 USA
| | - Stephen G. Sligar
- Departments of Biochemistry and Chemistry University of Illinois 116 Morrill Hall 505 S. Goodwin Avenue Urbana IL 61801 USA
| | - James R. Kincaid
- Department of Chemistry Marquette University 1414W Clybourn Street Milwaukee WI 53233 USA
| |
Collapse
|
34
|
Dybas J, Bokamper MJ, Marzec KM, Mak PJ. Probing the structure-function relationship of hemoglobin in living human red blood cells. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 239:118530. [PMID: 32498028 DOI: 10.1016/j.saa.2020.118530] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 05/14/2020] [Accepted: 05/22/2020] [Indexed: 06/11/2023]
Abstract
Hemoglobin (Hb) is a key component of respiratory system and as such plays important role in human physiology. The studies of Hb's structure and functions are usually performed on cell-free protein; however, it has been shown that there are functionally relevant differences between isolated Hb and Hb present inside red blood cells (RBCs). It is clear that new experimental approaches are needed to understand the origin of these differences and to gain insight into the structure-function relationship of Hb within intact living cells. In this work we present a novel application of Resonance Raman spectroscopy to study heme active site of different forms of human Hb within living RBCs using laser excitation lines in resonance with their Soret absorption bands. These studies revealed that there are no significant changes in the disposition of the Fe-O-O fragment or the Fe-NHis linkage for Hb molecules enclosed in RBCs and these in free isolated states. However, some changes in the orientation of the heme vinyl groups were observed which might account for the differences in the protein activity and ligand affinity. This work highlights importance of protein-based studies and presents a new opportunity to translate these results to physiological cell systems.
Collapse
Affiliation(s)
- Jakub Dybas
- Saint Louis University, Chemistry Department, 3501 Laclede Ave., 63103 Saint Louis, MO, United States; Jagiellonian University, Jagiellonian Centre for Experimental Therapeutics (JCET), 14 Bobrzyńskiego Str., 30-348 Krakow, Poland
| | - Matthew J Bokamper
- Saint Louis University, Chemistry Department, 3501 Laclede Ave., 63103 Saint Louis, MO, United States
| | - Katarzyna M Marzec
- Jagiellonian University, Jagiellonian Centre for Experimental Therapeutics (JCET), 14 Bobrzyńskiego Str., 30-348 Krakow, Poland.
| | - Piotr J Mak
- Saint Louis University, Chemistry Department, 3501 Laclede Ave., 63103 Saint Louis, MO, United States.
| |
Collapse
|
35
|
Moltved KA, Kepp KP. Dioxygen Binding to all 3d, 4d, and 5d Transition Metals from Coupled-Cluster Theory. Chemphyschem 2020; 21:2173-2186. [PMID: 32757346 DOI: 10.1002/cphc.202000529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 08/04/2020] [Indexed: 11/11/2022]
Abstract
Understanding how transition metals bind and activate dioxygen (O2 ) is limited by experimental and theoretical uncertainties, making accurate quantum mechanical descriptors of interest. Here we report coupled-cluster CCSD(T) energies with large basis sets and vibrational and relativistic corrections for 160 3d, 4d, and 5d metal-O2 systems. We define four reaction energies (120 in total for the 30 metals) that quantify O-O activation and reveal linear relationships between metal-oxygen and O-O binding energies. The CCSD(T) data can be combined with thermochemical cycles to estimate chemisorption and physisorption energies for each metal from metal oxide embedding energies, in good correlation with atomization enthalpies (R2 =0.75). Spin-geometry variations can break the linearities, of interest to circumventing the Sabatier principle. Pt, Pd, Co, and Fe form a distinct group with the weakest O2 binding. R2 up to 0.84 between surface adsorption energies and our energies for MO2 systems indicate relevance also to real catalytic systems.
Collapse
Affiliation(s)
- Klaus A Moltved
- Technical University of Denmark DTU Chemistry, Building 206, 2800, Kgs. Lyngby, Denmark
| | - Kasper P Kepp
- Technical University of Denmark DTU Chemistry, Building 206, 2800, Kgs. Lyngby, Denmark
| |
Collapse
|
36
|
Geeraerts Z, Heskin AK, DuBois J, Rodgers KR, Lukat-Rodgers GS. Structure and reactivity of chlorite dismutase nitrosyls. J Inorg Biochem 2020; 211:111203. [PMID: 32768737 PMCID: PMC7749827 DOI: 10.1016/j.jinorgbio.2020.111203] [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: 03/06/2020] [Revised: 07/14/2020] [Accepted: 07/16/2020] [Indexed: 11/28/2022]
Abstract
Ferric nitrosyl ({FeNO}6) and ferrous nitrosyl ({FeNO}7) complexes of the chlorite dismutases (Cld) from Klebsiella pneumoniae and Dechloromonas aromatica have been characterized using UV-visible absorbance and Soret-excited resonance Raman spectroscopy. Both of these Clds form kinetically stable {FeNO}6 complexes and they occupy a unique region of ν(Fe-NO)/ν(N-O) correlation space for proximal histidine liganded heme proteins, characteristic of weak Fe-NO and N-O bonds. This location is attributed to admixed FeIII-NO character of the {FeNO}6 ground state. Cld {FeNO}6 complexes undergo slow reductive nitrosylation to yield {FeNO}7 complexes. The effects of proximal and distal environment on reductive nitroylsation rates for these dimeric and pentameric Clds are reported. The ν(Fe-NO) and ν(N-O) frequencies for Cld {FeNO}7 complexes reveal both six-coordinate (6c) and five-coordinate (5c) nitrosyl hemes. These 6c and 5c forms are in a pH dependent equilibrium. The 6c and 5c {FeNO}7 Cld frequencies provided positions of both Clds on their respective ν(Fe-NO) vs ν(N-O) correlation lines. The 6c {FeNO}7 complexes fall below (along the ν(Fe-NO) axis) the correlation line that reports hydrogen-bond donation to NNO, which is consistent with a relatively weak Fe-NO bond. Kinetic and spectroscopic evidence is consistent with the 5c {FeNO}7 Clds having NO coordinated on the proximal side of the heme, analogous to 5c {FeNO}7 hemes in proteins known to have NO sensing functions.
Collapse
Affiliation(s)
- Zachary Geeraerts
- North Dakota State University, Fargo, ND 58108, United States of America
| | - Alisa K Heskin
- North Dakota State University, Fargo, ND 58108, United States of America
| | - Jennifer DuBois
- Montana State University, Bozeman, MT 59717, United States of America
| | - Kenton R Rodgers
- North Dakota State University, Fargo, ND 58108, United States of America.
| | | |
Collapse
|
37
|
Freindorf M, Kraka E. Critical assessment of the FeC and CO bond strength in carboxymyoglobin: a QM/MM local vibrational mode study. J Mol Model 2020; 26:281. [DOI: 10.1007/s00894-020-04519-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 08/26/2020] [Indexed: 12/15/2022]
|
38
|
Liou SH, Chuo SW, Qiu Y, Wang LP, Goodin DB. Linkage between Proximal and Distal Movements of P450cam Induced by Putidaredoxin. Biochemistry 2020; 59:2012-2021. [PMID: 32369344 PMCID: PMC9749489 DOI: 10.1021/acs.biochem.0c00294] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Putidaredoxin (Pdx) is the exclusive reductase and a structural effector for P450cam (CYP101A1). However, the mechanism of how Pdx modulates the conformational states of P450cam remains elusive. Here we report a putative communication pathway for the Pdx-induced conformational change in P450cam using results of double electron-electron resonance (DEER) spectroscopy and molecular dynamics simulations. Use of solution state DEER measurements allows us to observe subtle conformational changes in the internal helices in P450cam among closed, open, and P450cam-Pdx complex states. Molecular dynamics simulations and dynamic network analysis suggest that Pdx binding is coupled to small coordinated movements of several regions of P450cam, including helices C, B', I, G, and F. These changes provide a linkage between the Pdx binding site on the proximal side of the enzyme and helices F/G on the distal side and the site of the largest movement resulting from the Pdx-induced closed-to-open transition. This study provides a detailed rationale for how Pdx exerts its long-recognized effector function at the active site from its binding site on the opposite face of the enzyme.
Collapse
Affiliation(s)
| | | | - Yudong Qiu
- Department of Chemistry, University of California, Davis, Davis, California 95616, United States
| | - Lee-Ping Wang
- Department of Chemistry, University of California, Davis, Davis, California 95616, United States
| | - David B. Goodin
- Department of Chemistry, University of California, Davis, Davis, California 95616, United States
| |
Collapse
|
39
|
Soldatova AV, Spiro TG. Alternative modes of O 2 activation in P450 and NOS enzymes are clarified by DFT modeling and resonance Raman spectroscopy. J Inorg Biochem 2020; 207:111054. [PMID: 32217351 PMCID: PMC7247924 DOI: 10.1016/j.jinorgbio.2020.111054] [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: 11/20/2019] [Revised: 01/24/2020] [Accepted: 03/02/2020] [Indexed: 12/11/2022]
Abstract
The functions of heme proteins are modulated by hydrogen bonds (H-bonds) directed at the heme-bound ligands by protein residues. When the gaseous ligands CO, NO, or O2 are bound, their activity is strongly influenced by H-bonds to their atoms. These H-bonds produce characteristic changes in the vibrational frequencies of the heme adduct, which can be monitored by resonance Raman spectroscopy and interpreted with density functional theory (DFT) computations. When the protein employs a cysteinate proximal ligand, bound O2 becomes particularly reactive, the course of the reaction being controlled by H-bonding and proton delivery. In this work, DFT modeling is used to examine the effects of H-bonding to either the terminal (Ot) or proximate (Op) atom of methylthiolate-Fe(II)porphine-O2, as well as to the thiolate S atom. H-bonds to Op produce a positive linear correlation between ν(Fe - O) and ν(O - O), because they increase the sp2 character of Op, weakening both the Fe - O and O - O bonds. H-bonds to Ot produce a negative correlation, because they increase Fe backbonding, strengthening the Fe - O but weakening the O - O bond. Available experimental data accommodate well to the computed pattern. In particular, this correspondence supports the interpretation of cytochrome P450 data by Kincaid and Sligar [M. Gregory, P.J. Mak, S.G. Sligar, J.R. Kincaid, Angew. Chem. Int. Ed. 125 (2013) 5450-5453], involving steering between hydroxylation and lyase reaction channels by differential H-bonds. Similar channeling between the first and second steps of the nitric oxide synthase reaction is likely.
Collapse
Affiliation(s)
- Alexandra V Soldatova
- Department of Chemistry, University of Washington, Box 351700, Seattle, WA 98195, United States
| | - Thomas G Spiro
- Department of Chemistry, University of Washington, Box 351700, Seattle, WA 98195, United States.
| |
Collapse
|
40
|
Belvin BR, Musayev FN, Burgner J, Scarsdale JN, Escalante CR, Lewis JP. Nitrosative stress sensing in Porphyromonas gingivalis: structure of and heme binding by the transcriptional regulator HcpR. Acta Crystallogr D Struct Biol 2019; 75:437-450. [PMID: 30988260 PMCID: PMC6465984 DOI: 10.1107/s205979831900264x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Accepted: 02/21/2019] [Indexed: 11/10/2022] Open
Abstract
Although the HcpR regulator plays a vital step in initiation of the nitrosative stress response in many Gram-negative anaerobic bacteria, the molecular mechanisms that it uses to mediate gas sensing are not well understood. Here, a 2.6 Å resolution crystal structure of the N-terminal sensing domain of the anaerobic periodontopathogen Porphyromonas gingivalis HcpR is presented. The protein has classical features of the regulators belonging to the FNR-CRP family and contains a hydrophobic pocket in its N-terminal sensing domain. It is shown that heme bound to HcpR exhibits heme iron as a hexacoordinate system in the absence of nitric oxide (NO) and that upon nitrosylation it transitions to a pentacoordinate system. Finally, small-angle X-ray scattering experiments on full-length HcpR reveal that the C-terminal DNA-binding domain of HcpR has a high degree of interdomain flexibility.
Collapse
Affiliation(s)
- B. Ross Belvin
- Department of Biochemistry and Molecular Biology, School of Medicine, Virginia Commonwealth University, Richmond, VA 23298, USA
- The Philips Institute for Oral Health Research, School of Dentistry, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Faik N. Musayev
- Department of Medicinal Chemistry, School of Pharmacy, Virginia Commonwealth University, Richmond, VA 23298, USA
- The Institute for Structural Biology, Drug Discovery, and Development, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - John Burgner
- The Philips Institute for Oral Health Research, School of Dentistry, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - J. Neel Scarsdale
- Department of Biochemistry and Molecular Biology, School of Medicine, Virginia Commonwealth University, Richmond, VA 23298, USA
- The Institute for Structural Biology, Drug Discovery, and Development, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Carlos R. Escalante
- Department of Physiology and Biophysics, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Janina P. Lewis
- Department of Biochemistry and Molecular Biology, School of Medicine, Virginia Commonwealth University, Richmond, VA 23298, USA
- The Philips Institute for Oral Health Research, School of Dentistry, Virginia Commonwealth University, Richmond, VA 23298, USA
- Department of Microbiology and Immunology, School of Medicine, Virginia Commonwealth University, Richmond, VA 23298, USA
| |
Collapse
|
41
|
Altun A, Saitow M, Neese F, Bistoni G. Local Energy Decomposition of Open-Shell Molecular Systems in the Domain-Based Local Pair Natural Orbital Coupled Cluster Framework. J Chem Theory Comput 2019; 15:1616-1632. [PMID: 30702888 PMCID: PMC6728066 DOI: 10.1021/acs.jctc.8b01145] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
![]()
Local
energy decomposition (LED) analysis decomposes the interaction
energy between two fragments calculated at the domain-based local
pair natural orbital CCSD(T) (DLPNO-CCSD(T)) level of theory into
a series of chemically meaningful contributions and has found widespread
applications in the study of noncovalent interactions. Herein, an
extension of this scheme that allows for the analysis of interaction
energies of open-shell molecular systems calculated at the UHF-DLPNO-CCSD(T)
level is presented. The new scheme is illustrated through applications
to the CH2···X (X = He, Ne, Ar, Kr, and
water) and heme···CO interactions in the low-lying
singlet and triplet spin states. The results are used to discuss the
mechanism that governs the change in the singlet–triplet energy
gap of methylene and heme upon adduct formation.
Collapse
Affiliation(s)
- Ahmet Altun
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1 , D-45470 Mülheim an der Ruhr , Germany
| | - Masaaki Saitow
- Department of Chemistry, Graduate School of Science , Nagoya University , 1-5 Chikusa-ku , 464-8602 Nagoya , Japan
| | - Frank Neese
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1 , D-45470 Mülheim an der Ruhr , Germany
| | - Giovanni Bistoni
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1 , D-45470 Mülheim an der Ruhr , Germany
| |
Collapse
|
42
|
Yagi K, Yamada K, Kobayashi C, Sugita Y. Anharmonic Vibrational Analysis of Biomolecules and Solvated Molecules Using Hybrid QM/MM Computations. J Chem Theory Comput 2019; 15:1924-1938. [PMID: 30730746 PMCID: PMC8864611 DOI: 10.1021/acs.jctc.8b01193] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
![]()
Quantum
mechanics/molecular mechanics (QM/MM) calculations are
applied for anharmonic vibrational analyses of biomolecules and solvated
molecules. The QM/MM method is implemented into a molecular dynamics
(MD) program, GENESIS, by interfacing with external electronic structure
programs. Following the geometry optimization and the harmonic normal-mode
analysis based on a partial Hessian, the anharmonic potential energy
surface (PES) is generated from QM/MM energies and gradients calculated
at grid points. The PES is used for vibrational self-consistent field
(VSCF) and post-VSCF calculations to compute the vibrational spectrum.
The method is first applied to a phosphate ion in solution. With both
the ion and neighboring water molecules taken as a QM region, IR spectra
of representative hydration structures are calculated by the second-order
vibrational quasi-degenerate perturbation theory (VQDPT2) at the level
of B3LYP/cc-pVTZ and TIP3P force field. A weight-average of IR spectra
over the structures reproduces the experimental spectrum with a mean
absolute deviation of 16 cm–1. Then, the method
is applied to an enzyme, P450 nitric oxide reductase (P450nor), with
the NO molecule bound to a ferric (FeIII) heme. Starting
from snapshot structures obtained from MD simulations of P450nor in
solution, QM/MM calculations have been carried out at the level of
B3LYP-D3/def2-SVP(D). The spin state of FeIII(NO) is likely
a closed-shell singlet state based on a ratio of N–O and Fe–NO
stretching frequencies (νN–O and νFe–NO) calculated for closed- and open-shell singlet
states. The calculated νN–O and νFe–NO overestimate the experimental ones by 120 and
75 cm–1, respectively. The electronic structure
and solvation of FeIII(NO) affect the structure around
the heme of P450nor leading to an increase in νN–O and νFe–NO.
Collapse
Affiliation(s)
- Kiyoshi Yagi
- Theoretical Molecular Science Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Kenta Yamada
- Theoretical Molecular Science Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Chigusa Kobayashi
- Computational Biophysics Research Team, RIKEN Center for Computational Science, 7-1-26 Minatojima-Minamimachi, Chuo-ku, Kobe, Hyogo 650-0047, Japan
| | - Yuji Sugita
- Theoretical Molecular Science Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Computational Biophysics Research Team, RIKEN Center for Computational Science, 7-1-26 Minatojima-Minamimachi, Chuo-ku, Kobe, Hyogo 650-0047, Japan
- Laboratory for Biomolecular Function Simulation, RIKEN Center for Biosystems Dynamics Research, 1-6-5 Minatojima-Minamimachi,
Chuo-ku, Kobe, Hyogo 650-0047, Japan
| |
Collapse
|
43
|
Ramos S, Horness RE, Collins JA, Haak D, Thielges MC. Site-specific 2D IR spectroscopy: a general approach for the characterization of protein dynamics with high spatial and temporal resolution. Phys Chem Chem Phys 2019; 21:780-788. [PMID: 30548035 PMCID: PMC6360950 DOI: 10.1039/c8cp06146g] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The conformational heterogeneity and dynamics of protein side chains contribute to function, but investigating exactly how is hindered by experimental challenges arising from the fast timescales involved and the spatial heterogeneity of protein structures. The potential of two-dimensional infrared (2D IR) spectroscopy for measuring conformational heterogeneity and dynamics with unprecedented spatial and temporal resolution has motivated extensive effort to develop amino acids with functional groups that have frequency-resolved absorptions to serve as probes of their protein microenvironments. We demonstrate the full advantage of the approach by selective incorporation of the probe p-cyanophenylalanine at six distinct sites in a Src homology 3 domain and the application of 2D IR spectroscopy to site-specifically characterize heterogeneity and dynamics and their contribution to cognate ligand binding. The approach revealed a wide range of microenvironments and distinct responses to ligand binding, including at the three adjacent, conserved aromatic residues that form the recognition surface of the protein. Molecular dynamics simulations performed for all the labeled proteins provide insight into the underlying heterogeneity and dynamics. Similar application of 2D IR spectroscopy and site-selective probe incorporation will allow for the characterization of heterogeneity and dynamics of other proteins, how heterogeneity and dynamics are affected by solvation and local structure, and how they might contribute to biological function.
Collapse
Affiliation(s)
- Sashary Ramos
- Department of Chemistry, Indiana University, Bloomington, IN 47405, USA.
- Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Rachel E. Horness
- Department of Chemistry, Indiana University, Bloomington, IN 47405, USA.
- Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Jessica A. Collins
- Department of Chemistry, Indiana University, Bloomington, IN 47405, USA.
- Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - David Haak
- Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Megan C. Thielges
- Department of Chemistry, Indiana University, Bloomington, IN 47405, USA.
- Indiana University School of Medicine, Indianapolis, IN 46202, USA
| |
Collapse
|
44
|
Ghosh A, Stuehr DJ. Hsp90 and Its Role in Heme-Maturation of Client Proteins: Implications for Human Diseases. HEAT SHOCK PROTEINS 2019. [DOI: 10.1007/978-3-030-23158-3_12] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
45
|
Adam SM, Wijeratne GB, Rogler PJ, Diaz DE, Quist DA, Liu JJ, Karlin KD. Synthetic Fe/Cu Complexes: Toward Understanding Heme-Copper Oxidase Structure and Function. Chem Rev 2018; 118:10840-11022. [PMID: 30372042 PMCID: PMC6360144 DOI: 10.1021/acs.chemrev.8b00074] [Citation(s) in RCA: 132] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Heme-copper oxidases (HCOs) are terminal enzymes on the mitochondrial or bacterial respiratory electron transport chain, which utilize a unique heterobinuclear active site to catalyze the 4H+/4e- reduction of dioxygen to water. This process involves a proton-coupled electron transfer (PCET) from a tyrosine (phenolic) residue and additional redox events coupled to transmembrane proton pumping and ATP synthesis. Given that HCOs are large, complex, membrane-bound enzymes, bioinspired synthetic model chemistry is a promising approach to better understand heme-Cu-mediated dioxygen reduction, including the details of proton and electron movements. This review encompasses important aspects of heme-O2 and copper-O2 (bio)chemistries as they relate to the design and interpretation of small molecule model systems and provides perspectives from fundamental coordination chemistry, which can be applied to the understanding of HCO activity. We focus on recent advancements from studies of heme-Cu models, evaluating experimental and computational results, which highlight important fundamental structure-function relationships. Finally, we provide an outlook for future potential contributions from synthetic inorganic chemistry and discuss their implications with relevance to biological O2-reduction.
Collapse
Affiliation(s)
- Suzanne M. Adam
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Gayan B. Wijeratne
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Patrick J. Rogler
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Daniel E. Diaz
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - David A. Quist
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Jeffrey J. Liu
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Kenneth D. Karlin
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| |
Collapse
|
46
|
Bacon BA, Liu Y, Kincaid JR, Boon EM. Spectral Characterization of a Novel NO Sensing Protein in Bacteria: NosP. Biochemistry 2018; 57:6187-6200. [PMID: 30272959 DOI: 10.1021/acs.biochem.8b00451] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A novel family of bacterial hemoproteins named NosP has been discovered recently; its members are proposed to function as nitric oxide (NO) responsive proteins involved in bacterial group behaviors such as quorum sensing and biofilm growth and dispersal. Currently, little is known about molecular activation mechanisms in NosP. Here, functional studies were performed utilizing the distinct spectroscopic characteristics associated with the NosP heme cofactor. NosPs from Pseudomonas aeruginosa ( Pa), Vibrio cholerae ( Vc), and Legionella pneumophila ( Lpg) were studied in their ferrous unligated forms as well as their ferrous CO, ferrous NO, and ferric CN adducts. The resonance Raman (rR) data collected on the ferric forms strongly support the existence of a distorted heme cofactor, which is a common feature in NO sensors. The ferrous spectra exhibit a 213 cm-1 feature, which is assigned to the Fe-Nhis stretching mode. The Fe-C and C-O frequencies in the spectra of ferrous CO NosP complexes are inversely correlated with relatively similar frequencies, consistent with a proximal histidine ligand and a relatively hydrophobic environment. The rR spectra obtained for isotopically labeled ferrous NO adducts provide evidence of formation of a 5-coordinate NO complex, resulting from proximal Fe-Nhis cleavage, which is believed to play a role in biological heme-NO signal transduction. Additionally, we found that of the three NosPs studied, Lpg NosP contains the most electropositive ligand binding pocket, while Pa NosP has the most electronegative ligand binding pocket. This pattern is also observed in the measured heme reduction potentials for these three proteins, which may indicate distinct functions for each.
Collapse
Affiliation(s)
- Bezalel A Bacon
- Graduate program in Biochemistry and Structural Biology , Stony Brook University , Stony Brook , New York 11790-3400 , United States
| | - Yilin Liu
- Department of Chemistry , Marquette University , Milwaukee , Wisconsin 53233 , United States
| | - James R Kincaid
- Department of Chemistry , Marquette University , Milwaukee , Wisconsin 53233 , United States
| | - Elizabeth M Boon
- Graduate program in Biochemistry and Structural Biology , Stony Brook University , Stony Brook , New York 11790-3400 , United States.,Department of Chemistry and Institute of Chemical Biology and Drug Discovery , Stony Brook University , Stony Brook , New York 11794-3400 , United States
| |
Collapse
|
47
|
Carballal S, Valez V, Alvarez-Paggi D, Tovmasyan A, Batinic-Haberle I, Ferrer-Sueta G, Murgida DH, Radi R. Manganese porphyrin redox state in endothelial cells: Resonance Raman studies and implications for antioxidant protection towards peroxynitrite. Free Radic Biol Med 2018; 126:379-392. [PMID: 30144631 DOI: 10.1016/j.freeradbiomed.2018.08.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Revised: 08/18/2018] [Accepted: 08/20/2018] [Indexed: 10/28/2022]
Abstract
Cationic manganese(III) ortho N-substituted pyridylporphyrins (MnP) act as efficient antioxidants catalyzing superoxide dismutation and accelerating peroxynitrite reduction. Importantly, MnP can reach mitochondria offering protection against reactive species in different animal models of disease. Although an LC-MS/MS-based method for MnP quantitation and subcellular distribution has been reported, a direct method capable of evaluating both the uptake and the redox state of MnP in living cells has not yet been developed. In the present work we applied resonance Raman (RR) spectroscopy to analyze the intracellular accumulation of two potent MnP-based lipophilic SOD mimics, MnTnBuOE-2-PyP5+ and MnTnHex-2-PyP5+ within endothelial cells. RR experiments with isolated mitochondria revealed that the reduction of Mn(III)P was affected by inhibitors of the electron transport chain, supporting the action of MnP as efficient redox active compounds in mitochondria. Indeed, RR spectra confirmed that MnP added in the Mn(III) state can be incorporated into the cells, readily reduced by intracellular components to the Mn(II) state and oxidized by peroxynitrite. To assess the combined impact of reactivity and bioavailability, we studied the kinetics of Mn(III)TnBuOE-2-PyP5+ with peroxynitrite and evaluated the cytoprotective capacity of MnP by exposing the endothelial cells to nitro-oxidative stress induced by peroxynitrite. We observed a preservation of normal mitochondrial function, attenuation of cell damage and prevention of apoptotic cell death. These data introduce a novel application of RR spectroscopy for the direct detection of MnP and their redox states inside living cells, and helps to rationalize their antioxidant capacity in biological systems.
Collapse
Affiliation(s)
- Sebastián Carballal
- Departmento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay; Center for Free Radical and Biomedical Research, Universidad de la República, Montevideo, Uruguay
| | - Valeria Valez
- Departmento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay; Center for Free Radical and Biomedical Research, Universidad de la República, Montevideo, Uruguay
| | - Damián Alvarez-Paggi
- Departamento de Química Inorgánica, Analítica y Química Física and INQUIMAE-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. 2, piso 1, C1428EHA Buenos Aires, Argentina
| | - Artak Tovmasyan
- Department of Radiation Oncology, Duke University Medical Center, Durham, NC 27710, USA
| | - Ines Batinic-Haberle
- Department of Radiation Oncology, Duke University Medical Center, Durham, NC 27710, USA
| | - Gerardo Ferrer-Sueta
- Center for Free Radical and Biomedical Research, Universidad de la República, Montevideo, Uruguay; Laboratorio de Fisicoquímica Biológica, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Daniel H Murgida
- Departamento de Química Inorgánica, Analítica y Química Física and INQUIMAE-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. 2, piso 1, C1428EHA Buenos Aires, Argentina
| | - Rafael Radi
- Departmento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay; Center for Free Radical and Biomedical Research, Universidad de la República, Montevideo, Uruguay.
| |
Collapse
|
48
|
Weak coordination of H2S to the solid-state ferrous porphyrin complexes with diatomic molecules. Characterization of 6-coordinate adducts at low temperature. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.07.044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
49
|
Shinomiya R, Katahira Y, Araki H, Shibata T, Momotake A, Yanagisawa S, Ogura T, Suzuki A, Neya S, Yamamoto Y. Characterization of Catalytic Activities and Heme Coordination Structures of Heme-DNA Complexes Composed of Some Chemically Modified Hemes and an All Parallel-Stranded Tetrameric G-Quadruplex DNA Formed from d(TTAGGG). Biochemistry 2018; 57:5930-5937. [PMID: 30207701 DOI: 10.1021/acs.biochem.8b00793] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Heme binds selectively to the 3'-terminal G-quartet (G6 G-quartet) of an all parallel-stranded tetrameric G-quadruplex DNA, [d(TTAGGG)]4, to form a heme-DNA complex. Complexes between [d(TTAGGG)]4 and a series of chemically modified hemes possessing a heme Fe atom with a variety of electron densities were characterized in terms of their peroxidase activities to evaluate the effect of a change in the electron density of the heme Fe atom (ρFe) on their activities. The peroxidase activity of a complex decreased with a decreasing ρFe, supporting the idea that the activity of the complex is elicited through a reaction mechanism similar to that of a peroxidase. In the ferrous heme-DNA complex, carbon monoxide (CO) can bind to the heme Fe atom on the side of the heme opposite the G6 G-quartet, and a water molecule (H2O) is coordinated to the Fe atom as another axial ligand, trans to the CO. The stretching frequencies of Fe-bound CO (νCO) and the Fe-C bond (νFe-C) of CO adducts of the heme-DNA complexes were determined to investigate the structural and electronic natures of the axial ligands coordinated to the heme Fe atom. Comparison of the νCO and νFe-C values of the heme-DNA complexes with those of myoglobin (Mb) revealed that the donor strength of the axial ligation trans to the CO in a complex is considerably weaker than that of the proximal histidine in Mb, as expected from the coordination of H2O trans to the CO in the complex.
Collapse
Affiliation(s)
- Ryosuke Shinomiya
- Department of Chemistry , University of Tsukuba , Tsukuba 305-8571 , Japan
| | - Yuya Katahira
- Department of Chemistry , University of Tsukuba , Tsukuba 305-8571 , Japan
| | - Haruka Araki
- Department of Chemistry , University of Tsukuba , Tsukuba 305-8571 , Japan
| | - Tomokazu Shibata
- Department of Chemistry , University of Tsukuba , Tsukuba 305-8571 , Japan
| | - Atsuya Momotake
- Department of Chemistry , University of Tsukuba , Tsukuba 305-8571 , Japan
| | - Sachiko Yanagisawa
- Graduate School of Life Science , University of Hyogo , Hyogo 678-1297 , Japan
| | - Takashi Ogura
- Graduate School of Life Science , University of Hyogo , Hyogo 678-1297 , Japan
| | - Akihiro Suzuki
- Department of Materials Engineering, National Institute of Technology , Nagaoka College , Nagaoka 940-8532 , Japan
| | - Saburo Neya
- Department of Physical Chemistry, Graduate School of Pharmaceutical Sciences , Chiba University , Chuoh-Inohana , Chiba 260-8675 , Japan
| | - Yasuhiko Yamamoto
- Department of Chemistry , University of Tsukuba , Tsukuba 305-8571 , Japan.,Tsukuba Research Center for Energy Materials Science (TREMS) , University of Tsukuba , Tsukuba 305-8571 , Japan.,Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance (TARA) , University of Tsukuba , Tsukuba 305-8577 , Japan
| |
Collapse
|
50
|
Mak PJ, Duggal R, Denisov IG, Gregory MC, Sligar SG, Kincaid JR. Human Cytochrome CYP17A1: The Structural Basis for Compromised Lyase Activity with 17-Hydroxyprogesterone. J Am Chem Soc 2018; 140:7324-7331. [PMID: 29758981 DOI: 10.1021/jacs.8b03901] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The multifunctional enzyme, cytochrome P450 (CYP17A1), plays a crucial role in the production of androgens, catalyzing two key reactions on pregnenolone (PREG) and progesterone (PROG), the first being a 17-hydroxylation to generate 17-OH PREG and 17-OH PROG, with roughly equal efficiencies. The second is a C-C bond scission or "lyase" reaction in which the C17-C20 bond is cleaved, leading to the eventual production of powerful androgens, whose involvement in the proliferation of prostate cancer has generated intense interest in developing inhibitors of CYP17A1. For humans, the significance of the C-C bond cleavage of 17-OH PROG is lessened, because it is about 50 times less efficient than for 17-OH PREG in terms of kcat/Km. Recognizing the need to clarify relevant reaction mechanisms involved with such transformations, we first report studies of solvent isotope effects, results of which are consistent with a Compound I mediated PROG hydroxylase activity, yet exclude this intermediate as a participant in the formation of androstenedione (AD) via the lyase reaction. This finding is also supported by a combination of cryoreduction and resonance Raman spectroscopy that traps and structurally characterizes the key hemiketal reaction intermediates. Adding to a previous study of PREG and 17-OH PREG metabolism, the current work provides definitive evidence for a more facile protonation of the initially formed ferric peroxo-intermediate for 17-OH PROG-bound CYP17A1, compared to the complex with 17-OH PREG. Importantly, Raman characterization also reveals an H-bonding interaction with the terminal oxygen of the peroxo fragment, rather than with the proximal oxygen, as is present for 17-OH PREG. These factors would favor a diminished lyase activity of the sample with 17-OH PROG relative to the complex with 17-OH PREG, thereby providing a convincing structural explanation for the dramatic differences in activity for these lyase substrates in humans.
Collapse
Affiliation(s)
- Piotr J Mak
- Department of Chemistry , Marquette University , Milwaukee , Wisconsin 53233 , United States
| | - Ruchia Duggal
- Department of Biochemistry , University of Illinois at Urbana-Champaign , 505 S. Goodwin , Urbana , Illinois 61801 , United States
| | - Ilia G Denisov
- Department of Biochemistry , University of Illinois at Urbana-Champaign , 505 S. Goodwin , Urbana , Illinois 61801 , United States
| | - Michael C Gregory
- Department of Biochemistry , University of Illinois at Urbana-Champaign , 505 S. Goodwin , Urbana , Illinois 61801 , United States
| | - Stephen G Sligar
- Department of Biochemistry , University of Illinois at Urbana-Champaign , 505 S. Goodwin , Urbana , Illinois 61801 , United States.,Department of Chemistry , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States
| | - James R Kincaid
- Department of Chemistry , Marquette University , Milwaukee , Wisconsin 53233 , United States
| |
Collapse
|