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Effects of Protein Structure on Iron–Polypeptide Vibrational Dynamic Coupling in Cytochrome c

Journal Article · · Biochemistry
DOI:https://doi.org/10.1021/bi501430z· OSTI ID:1261133
 [1];  [2];  [2];  [3];  [4];  [4];  [4];  [2];  [3]
  1. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Chemistry; Penn State, Erie, PA (United States). Behrend College
  2. Univ. of Rochester, NY (United States). Dept. of Chemistry
  3. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Chemistry
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Cytochrome c (Cyt c) has a heme covalently bound to the polypeptide via a Cys-X-X-Cys-His (CXXCH) linker that is located in the interface region for protein–protein interactions. To determine whether the polypeptide matrix influences iron vibrational dynamics, nuclear resonance vibrational spectroscopy (NRVS) measurements were performed on 57Fe-labeled ferric Hydrogenobacter thermophilus cytochrome c-552, and variants M13V, M13V/K22M, and A7F, which have structural modifications that alter the composition or environment of the CXXCH pentapeptide loop. Simulations of the NRVS data indicate that the 150–325 cm–1 region is dominated by NHis–Fe–SMet axial ligand and polypeptide motions, while the 325–400 cm–1 region shows dominant contributions from ν(Fe–NPyr) (Pyr = pyrrole) and other heme-based modes. Diagnostic spectral signatures that directly relate to structural features of the heme active site are identified using a quantum chemistry-centered normal coordinate analysis (QCC-NCA). In particular, spectral features that directly correlate with CXXCH loop stiffness, the strength of the Fe–His interaction, and the degree of heme distortion are identified. Cumulative results from our investigation suggest that compared to the wild type (wt), variants M13V and M13V/K22M have a more rigid CXXCH pentapeptide segment, a stronger Fe–NHis interaction, and a more ruffled heme. Conversely, the A7F variant has a more planar heme and a weaker Fe–NHis bond. These results are correlated to the observed changes in reduction potential between wt protein and the variants studied here. Lastly, we discuss the implications of these results for Cyt c biogenesis and electron transfer.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Institutes of Health (NIH); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1261133
Alternate ID(s):
OSTI ID: 1362102
Journal Information:
Biochemistry, Journal Name: Biochemistry Journal Issue: 4 Vol. 54; ISSN 0006-2960
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (59)

Electrochemically induced FTIR difference spectroscopy in the mid- to far infrared (200 μm) domain: A new setup for the analysis of metal–ligand interactions in redox proteins journal January 2006
Conserved nonplanar heme distortions in cytochromesc journal January 1995
Cytochrome c: Resonance Raman spectra journal August 1972
Structure of cytochrome c551 from Pseudomonas aeruginosa refined at 1.6 Å resolution and comparison of the two redox forms journal April 1982
Infrared spectroscopy of proteins journal September 2007
Nuclear resonance vibrational spectroscopy ? NRVS journal January 2005
Iron Normal Mode Dynamics in (Nitrosyl)iron(II)tetraphenylporphyrin from X-ray Nuclear Resonance Data journal June 2002
Conservation of the Conformation of the Porphyrin Macrocycle in Hemoproteins journal February 1998
Resonance Raman Investigations of Cytochrome c Conformational Change upon Interaction with the Membranes of Intact and Ca 2+ -Exposed Mitochondria journal May 2003
Mitochondrial and Microsomal Ferric b5 Cytochromes Exhibit Divergent Conformational Plasticity in the Context of a Common Fold journal June 2005
Protein-Induced Changes in Nonplanarity of the Porphyrin in Nickel Cytochrome c Probed by Resonance Raman Spectroscopy journal April 1998
UV Resonance Raman Investigations of Peptide and Protein Structure and Dynamics journal February 2012
Spectroscopic Properties and Electronic Structure of Five- and Six-Coordinate Iron(II) Porphyrin NO Complexes:  Effect of the Axial N-Donor Ligand journal April 2006
Quantum Chemistry-Based Analysis of the Vibrational Spectra of Five-Coordinate Metalloporphyrins [M(TPP)Cl] journal April 2006
Variation and Analysis of Second-Sphere Interactions and Axial Histidinate Character in c -type Cytochromes journal September 2010
Oriented Single-Crystal Nuclear Resonance Vibrational Spectroscopy of [Fe(TPP)(MI)(NO)]: Quantitative Assessment of the trans Effect of NO journal August 2010
Modulation of Ligand-Field Parameters by Heme Ruffling in Cytochromes c Revealed by EPR Spectroscopy journal December 2011
Vibrational Assignments of Six-Coordinate Ferrous Heme Nitrosyls: New Insight from Nuclear Resonance Vibrational Spectroscopy journal November 2008
NMR and DFT Investigation of Heme Ruffling: Functional Implications for Cytochrome c journal July 2010
Crowding Induced Collective Hydration of Biological Macromolecules over Extended Distances journal December 2013
Resonance Raman Optical Activity and Surface Enhanced Resonance Raman Optical Activity Analysis of Cytochrome c journal July 2007
Vibrational Dynamics of Iron in Cytochrome c journal February 2009
The chemistry and biochemistry of heme c: functional bases for covalent attachment journal January 2008
Investigations of heme distortion, low-frequency vibrational excitations, and electron transfer in cytochrome c journal April 2014
Mechanisms of Mitochondrial Holocytochrome c Synthase and the Key Roles Played by Cysteines and Histidine of the Heme Attachment Site, Cys-XX-Cys-His journal October 2014
An Obligatory Intermediate in the Folding Pathway of Cytochrome c 552 from Hydrogenobacter thermophilus journal May 2005
Unveiling a Hidden Folding Intermediate in c -Type Cytochromes by Protein Engineering journal February 2006
Nuclear resonant spectroscopy journal January 2004
Density-functional exchange-energy approximation with correct asymptotic behavior journal September 1988
Density-functional approximation for the correlation energy of the inhomogeneous electron gas journal June 1986
Conserved nonplanar heme distortions in cytochromesc journal January 1995
Axial histidyl imidazole non-exchangeable proton resonances as indicators of imidazole hydrogen bonding in ferric cyanide complexes of heme peroxidases journal November 1982
Electron transfers in chemistry and biology journal August 1985
Iron Normal Mode Dynamics in (Nitrosyl)iron(II)tetraphenylporphyrin from X-ray Nuclear Resonance Data journal June 2002
Conservation of the Conformation of the Porphyrin Macrocycle in Hemoproteins journal February 1998
Induction of Apoptotic Program in Cell-Free Extracts: Requirement for dATP and Cytochrome c journal July 1996
Substrate recognition of holocytochromecsynthase: N-terminal region and CXXCH motif of mitochondrial cytochromec journal July 2014
Protein Dynamics Studied with Ultrafast Two-Dimensional Infrared Vibrational Echo Spectroscopy journal March 2012
Heme Attachment Motif Mobility Tunes Cytochrome c Redox Potential journal October 2007
Resonance Raman Investigation of Nickel Microperoxidase-11 journal February 1999
Effect on redox potentials of hydrogen bonding from coordinated imidazole in metalloporphyrin complexes journal April 1985
Nuclear Resonance Vibrational Spectroscopy Applied to [Fe(OEP)(NO)]: The Vibrational Assignments of Five-Coordinate Ferrous Heme−Nitrosyls and Implications for Electronic Structure journal March 2010
Complete assignment of cytochrome c resonance Raman spectra via enzymic reconstitution with isotopically labeled hemes journal December 1993
Influence of hydrogen bonding on the properties of iron porphyrin imidazole complexes. An internally hydrogen bonded imidazole ligand journal July 1984
Direct Determination of the Complete Set of Iron Normal Modes in a Porphyrin-Imidazole Model for Carbonmonoxy-heme Proteins:  [Fe(TPP)(CO)(1-MeIm)] journal June 2003
Resonance Raman Studies of Heme Axial Ligation in H93G Myoglobin journal October 2000
Carbon−Deuterium Bonds as Site-Specific and Nonperturbative Probes for Time-Resolved Studies of Protein Dynamics and Folding journal February 2011
Principles and patterns in the interaction between mono-heme cytochrome c and its partners in electron transfer processes journal January 2011
Ab initio effective core potentials for molecular calculations. Potentials for the transition metal atoms Sc to Hg journal January 1985
Ab initio effective core potentials for molecular calculations. Potentials for main group elements Na to Bi journal January 1985
Ab initio effective core potentials for molecular calculations. Potentials for K to Au including the outermost core orbitals journal January 1985
Heme-protein vibrational couplings in cytochrome c provide a dynamic link that connects the heme-iron and the protein surface journal May 2012
Mechanisms of Mitochondrial Holocytochrome c Synthase and the Key Roles Played by Cysteines and Histidine of the Heme Attachment Site, Cys-XX-Cys-His journal October 2014
Effect of Cytochrome c on the Generation and Elimination of O 2 ⨪ and H2O2 in Mitochondria journal January 2003
An Obligatory Intermediate in the Folding Pathway of Cytochrome c 552 from Hydrogenobacter thermophilus journal May 2005
Unveiling a Hidden Folding Intermediate in c -Type Cytochromes by Protein Engineering journal February 2006
Density-functional exchange-energy approximation with correct asymptotic behavior journal September 1988
Density-functional approximation for the correlation energy of the inhomogeneous electron gas journal June 1986
Hydrogen Tunneling Links Protein Dynamics to Enzyme Catalysis journal June 2013

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