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Moeser B, Janoschka A, Wolny JA, Paulsen H, Filippov I, Berry RE, Zhang H, Chumakov AI, Walker FA, Schünemann V. Nuclear inelastic scattering and Mössbauer spectroscopy as local probes for ligand binding modes and electronic properties in proteins: vibrational behavior of a ferriheme center inside a β-barrel protein. J Am Chem Soc 2012; 134:4216-28. [PMID: 22295945 DOI: 10.1021/ja210067t] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
In this work, we present a study of the influence of the protein matrix on its ability to tune the binding of small ligands such as NO, cyanide (CN(-)), and histamine to the ferric heme iron center in the NO-storage and -transport protein Nitrophorin 2 (NP2) from the salivary glands of the blood-sucking insect Rhodnius prolixus. Conventional Mössbauer spectroscopy shows a diamagnetic ground state of the NP2-NO complex and Type I and II electronic ground states of the NP2-CN(-) and NP2-histamine complex, respectively. The change in the vibrational signature of the protein upon ligand binding has been monitored by Nuclear Inelastic Scattering (NIS), also called Nuclear Resonant Vibrational Spectroscopy (NRVS). The NIS data thus obtained have also been calculated by quantum mechanical (QM) density functional theory (DFT) coupled with molecular mechanics (MM) methods. The calculations presented here show that the heme ruffling in NP2 is a consequence of the interaction with the protein matrix. Structure optimizations of the heme and its ligands with DFT retain the characteristic saddling and ruffling only if the protein matrix is taken into account. Furthermore, simulations of the NIS data by QM/MM calculations suggest that the pH dependence of the binding of NO, but not of CN(-) and histamine, might be a consequence of the protonation state of the heme carboxyls.
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Affiliation(s)
- Beate Moeser
- Technische Universität Kaiserslautern, Fachbereich Physik, Erwin-Schrödinger-Str. 56, D-67663 Kaiserslautern, Germany
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Upadhyay AK, Hooper AB, Hendrich MP. NO reductase activity of the tetraheme cytochrome C554 of Nitrosomonas europaea. J Am Chem Soc 2006; 128:4330-7. [PMID: 16569009 PMCID: PMC2806813 DOI: 10.1021/ja055183+] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The tetraheme cytochrome c(554) (cyt c(554)) from Nitrosomonas europaea is believed to function as an electron-transfer protein from hydroxylamine oxidoreductase (HAO). We show here that cyt c(554) also has significant NO reductase activity. The protein contains one high-spin and three low-spin c-type hemes. HAO catalyzed reduction of the cyt c(554), ligand binding, intermolecular electron transfer, and kinetics of NO reduction by cyt c(554) have been investigated. We detect the formation of a NO-bound ferrous heme species in cyt c(554) by EPR and Mössbauer spectroscopies during the HAO catalyzed oxidation of hydroxylamine, indicating that N-oxide intermediates produced from HAO readily bind to cyt c(554). In the half-reduced state of cyt c(554), we detect a spin interaction between the [FeNO](7) state of heme 2 and the low-spin ferric state of heme 4. We find that ferrous cyt c(554) will reduce NO at a rate greater than 16 s(-1), which is comparable to rates of other known NO reductases. Carbon monoxide or nitrite are shown not to bind to the reduced protein, and previous results indicate the reactions with O(2) are slow and that a variety of ligands will not bind in the oxidized state. Thus, the enzymatic site is highly selective for NO. The NO reductase activity of cyt c(554) may be important during ammonia oxidation in N. europaea at low oxygen concentrations to detoxify NO produced by reduction of nitrite or incomplete oxidation of hydroxylamine.
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Affiliation(s)
- Anup K. Upadhyay
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213
| | - Alan B. Hooper
- Department of Biochemistry, University of Minnesota, St. Paul, Minnesota 55108
| | - Michael P. Hendrich
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213
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Schünemann V, Benda R, Trautwein AX, Walker FA. Mössbauer spectroscopic studies of the six-coordinate heme-nitric oxide complex of iron(III) octaethylporphyrinN-methylimidazole, the first model of the nitrophorin-no complexes. Isr J Chem 2000. [DOI: 10.1002/ijch.5680400103] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Hauser C, Glaser T, Bill E, Weyhermüller T, Wieghardt K. The Electronic Structures of an Isostructural Series of Octahedral Nitrosyliron Complexes {Fe−NO}6,7,8 Elucidated by Mössbauer Spectroscopy. J Am Chem Soc 2000. [DOI: 10.1021/ja994161i] [Citation(s) in RCA: 129] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christina Hauser
- Contribution from the Max-Planck-Institut für Strahlenchemie, Stiftstrasse 34-36, D-45470 Mülheim a.d. Ruhr, Germany
| | - Thorsten Glaser
- Contribution from the Max-Planck-Institut für Strahlenchemie, Stiftstrasse 34-36, D-45470 Mülheim a.d. Ruhr, Germany
| | - Eckhard Bill
- Contribution from the Max-Planck-Institut für Strahlenchemie, Stiftstrasse 34-36, D-45470 Mülheim a.d. Ruhr, Germany
| | - Thomas Weyhermüller
- Contribution from the Max-Planck-Institut für Strahlenchemie, Stiftstrasse 34-36, D-45470 Mülheim a.d. Ruhr, Germany
| | - Karl Wieghardt
- Contribution from the Max-Planck-Institut für Strahlenchemie, Stiftstrasse 34-36, D-45470 Mülheim a.d. Ruhr, Germany
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Ann Walker F, Montfort WR. The nitric oxide-releasing heme proteins from the saliva of the blood-sucking insect Rhodnius prolixus. ADVANCES IN INORGANIC CHEMISTRY 2000. [DOI: 10.1016/s0898-8838(00)51006-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Nasri H, Ellison MK, Chen S, Huynh BH, Scheidt WR. Sharing the π-Bonding. An Iron Porphyrin Derivative with Trans, π-Accepting Axial Ligands. Synthesis, EPR and Mössbauer Spectra, and Molecular Structure of Two Forms of the Complex Nitronitrosyl(α,α,α,α-tetrakis(o-pivalamidophenyl)- porphinato)ferrate(II). J Am Chem Soc 1997. [DOI: 10.1021/ja963871a] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Habib Nasri
- Contribution from the Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, and Department of Physics, Emory University, Atlanta, Georgia 30322
| | - Mary K. Ellison
- Contribution from the Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, and Department of Physics, Emory University, Atlanta, Georgia 30322
| | - Shuxian Chen
- Contribution from the Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, and Department of Physics, Emory University, Atlanta, Georgia 30322
| | - Boi Hanh Huynh
- Contribution from the Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, and Department of Physics, Emory University, Atlanta, Georgia 30322
| | - W. Robert Scheidt
- Contribution from the Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, and Department of Physics, Emory University, Atlanta, Georgia 30322
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Berks BC, Ferguson SJ, Moir JW, Richardson DJ. Enzymes and associated electron transport systems that catalyse the respiratory reduction of nitrogen oxides and oxyanions. BIOCHIMICA ET BIOPHYSICA ACTA 1995; 1232:97-173. [PMID: 8534676 DOI: 10.1016/0005-2728(95)00092-5] [Citation(s) in RCA: 390] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- B C Berks
- Centre for Metalloprotein Spectroscopy and Biology, School of Biological Sciences, University of East Anglia, Norwich, UK
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[38] Mössbauer spectroscopy in study of cytochrome cd1 from Thiobacillus denitrificans, desulfoviridin, and iron hydrogenase. Methods Enzymol 1994. [DOI: 10.1016/0076-6879(94)43040-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Costa C, Moura J, Moura I, Liu M, Peck H, LeGall J, Wang Y, Huynh B. Hexaheme nitrite reductase from Desulfovibrio desulfuricans. Mössbauer and EPR characterization of the heme groups. J Biol Chem 1990. [DOI: 10.1016/s0021-9258(18)77313-4] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Steup MB, Muhoberac BB. Preparation and spectral characterization of the heme d1.apomyoglobin complex: an unusual protein environment for the substrate-binding heme of Pseudomonas cytochrome oxidase. J Inorg Biochem 1989; 37:233-57. [PMID: 2557389 DOI: 10.1016/0162-0134(89)80045-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The heme d1 prosthetic group isolated from Pseudomonas cytochrome oxidase combines with apomyoglobin to form a stable, optically well-defined complex. Addition of ferric heme d1 quenches apomyoglobin tryptophan fluorescence suggesting association in a 1:1 molar ratio. Optical absorption maxima for heme d1.apomyoglobin are at 629 and 429 nm before, and 632 and 458 nm after dithionite reduction; they are distinct from those of heme d1 in aqueous solution but more similar to those unobscured by heme c in Pseudomonas cytochrome oxidase. Cyanide, carbon monoxide and imidazole alter the spectrum of heme d1.apomyoglobin demonstrating axial coordination to heme d1 by exogeneous ligands. The cyanide-induced optical difference spectra exhibit isosbestic points, and a Scatchard-like analysis yields a linear plot with an apparent dissociation constant of 4.2 X 10(-5) M. However, carbon monoxide induces two absorption spectra with Soret maxima at 454 or 467 nm, and this duplicity, along with a shoulder that correlates with the latter before binding, suggests multiple carbon monoxide and possibly heme d1 orientations within the globin. The 50-fold reduction in cyanide affinity over myoglobin is more consistent with altered heme pocket interactions than the intrinsic electronic differences between the two hemes. However, stability of the heme d1.apomyoglobin complex is verified further by the inability to separate heme d1 from globin during dialysis and column chromatography in excess cyanide or imidazole. This stability, together with a comparison between spectra of ligand-free and -bound derivatives of heme d1-apomyoglobin and heme d1 in solution, implies that the prosthetic group is coordinated in the heme pocket through a protein-donated, strong-field ligand. Furthermore, the visible spectrum of heme d1.apomyoglobin varies minimally with ligand exchange, in contrast to the Soret, which suggests that much spectral information concerning heme d1 coordination in the oxidase is lost by interference from heme c absorption bands. A comparison of the absorption spectra of heme d1.apomyoglobin and Pseudomonas cytochrome oxidase, together with a critical examination of the previous axial ligand assignments from magnetic resonance techniques in the latter, implies that it is premature to accept the assignment of bishistidine heme d1 coordination in oxidized, ligand-free oxidase and other iron-isobacteriochlorin-containing enzymes.
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Affiliation(s)
- M B Steup
- Department of Chemistry, Purdue University School of Science, Indiana University-Purdue University, Indianapolis
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