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Title: A semisynthetic strategy leads to alteration of the backbone amidate ligand in the NiSOD active site

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.5b03629· OSTI ID:1224774
 [1];  [2];  [3];  [1];  [4];  [1]
  1. Univ. of Massachusetts, Amherst, MA (United States)
  2. Lex Company Research Lab., Shirley, MA (United States)
  3. New England Peptide, Gardner, MA (United States)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States)

In this study, computational investigations have implicated the amidate ligand in nickel superoxide dismutase (NiSOD) in stabilizing Ni-centered redox catalysis and in preventing cysteine thiolate ligand oxidation. To test these predictions, we have used an experimental approach utilizing a semisynthetic scheme that employs native chemical ligation of a pentapeptide (HCDLP) to recombinant S. coelicolor NiSOD lacking these N-terminal residues, NΔ5-NiSOD. Wild-type enzyme produced in this manner exhibits the characteristic spectral properties of recombinant WT-NiSOD and is as catalytically active. The semisynthetic scheme was also employed to construct a variant where the amidate ligand was converted to a secondary amine, H1*-NiSOD, a novel strategy that retains a backbone N-donor atom. The H1*-NiSOD variant was found to have only ~1% of the catalytic activity of the recombinant wild-type enzyme, and had altered spectroscopic properties. X-ray absorption spectroscopy reveals a four-coordinate planar site with N2S2-donor ligands, consistent with electronic absorption spectroscopic results indicating that the Ni center in H1*-NiSOD is mostly reduced in the as-isolated sample, as opposed to 50:50 Ni(II)/Ni(III) mixture that is typical for the recombinant wild-type enzyme. The EPR spectrum of as-isolated H1*-NiSOD accounts for ~11% of the Ni in the sample and is similar to WT-NiSOD, but more axial, with gz < gx,y. 14N-hyperfine is observed on gz, confirming the addition of the apical histidine ligand in the Ni(III) complex. Lastly, the altered electronic properties and implications for redox catalysis are discussed in light of predictions based on synthetic and computational models.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC00112704; SC0012704; AC02-98CH10886
OSTI ID:
1224774
Alternate ID(s):
OSTI ID: 1335404
Report Number(s):
BNL-108507-2015-JA; BNL-111846-2016-JA; R&D Project: CO004; KC0304030
Journal Information:
Journal of the American Chemical Society, Vol. 137, Issue 28; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 17 works
Citation information provided by
Web of Science

References (55)

Nickel superoxide dismutase: structural and functional roles of Cys2 and Cys6 journal March 2010
Backbone-Engineered High-Potential Iron Proteins:  Effects of Active-Site Hydrogen Bonding on Reduction Potential journal November 2000
Structural comparison of alkylated derivatives of (bmmp-dmed)Ni and (bmmp-dmed)Zn journal February 2005
Analysis of Backbone Hydrogen Bonding in a β-Turn of Staphylococcal Nuclease journal December 1997
Role of Conserved Tyrosine Residues in NiSOD Catalysis: A Case of Convergent Evolution journal March 2009
Crystal structure of nickel-containing superoxide dismutase reveals another type of active site journal June 2004
Amino Acids and Peptides. L. Development of a Novel N.PI.-Protecting Group for Histidine, N.PI.-2-Adamantyloxymethylhistidine, and Its Application to Peptide Synthesis. journal January 1997
Mycobacterium tuberculosis NmtR Harbors a Nickel Sensing Site with Parallels to Escherichia coli RcnR journal September 2011
Communication between the Zinc and Nickel Sites in Dimeric HypA: Metal Recognition and pH Sensing journal August 2010
Probing Intermolecular Main Chain Hydrogen Bonding in Serine Proteinase−Protein Inhibitor Complexes:  Chemical Synthesis of Backbone-Engineered Turkey Ovomucoid Third Domain journal January 1997
Oxygen Capture by Sulfur in Nickel Thiolates journal May 1998
An Experimental Approach to Evaluating the Role of Backbone Interactions in Proteins Using Unnatural Amino Acid Mutagenesis journal September 1997
Examination of the Nickel Site Structure and Reaction Mechanism in Streptomyces seoulensis Superoxide Dismutase journal March 1999
Spectroscopic and Computational Studies of Ni Superoxide Dismutase:  Electronic Structure Contributions to Enzymatic Function journal April 2005
Unraveling the Helicobacter pylori UreG zinc binding site using X-ray absorption spectroscopy (XAS) and structural modeling journal November 2011
Site-specific incorporation of nonnatural residues during in vitro protein biosynthesis with semi-synthetic aminoacyl-tRNAs journal June 1991
Expression, Reconstitution, and Mutation of Recombinant Streptomyces c oelicolor NiSOD journal January 2004
The Influence of Amine/Amide versus Bisamide Coordination in Nickel Superoxide Dismutase journal December 2006
X-ray spectroscopic studies of nickel complexes, with application to the structure of nickel sites in hydrogenases journal March 1991
Synthesis of highly epimerizable N-protected α-amino aldehydes of high enantiomeric excess journal February 2000
Design and chemical synthesis of a sequence-specific DNA-cleaving protein journal October 1988
Nickel-Specific Response in the Transcriptional Regulator, Escherichia coli NikR journal April 2007
A Nickel Superoxide Dismutase Maquette That Reproduces the Spectroscopic and Functional Properties of the Metalloenzyme journal March 2006
Characterization of Semisynthetic and Naturally N α -Acetylated α-Synuclein in Vitro and in Intact Cells : IMPLICATIONS FOR AGGREGATION AND CELLULAR PROPERTIES OF α-SYNUCLEIN journal June 2012
[Me 4 N](Ni II (BEAAM)):  A Synthetic Model for Nickel Superoxide Dismutase That Contains Ni in a Mixed Amine/Amide Coordination Environment journal November 2006
Superoxide as an intracellular radical sink journal January 1993
Nickel Superoxide Dismutase Structure and Mechanism journal June 2004
Density functional theory investigations of NiN2S2 reactivity as a function of nitrogen donor type and N–H···S hydrogen bonding inspired by nickel-containing superoxide dismutase journal May 2006
Metallopeptide Based Mimics with Substituted Histidines Approximate a Key Hydrogen Bonding Network in the Metalloenzyme Nickel Superoxide Dismutase journal November 2009
Peptide Backbone Chemistry and Membrane Channel Function:  Effects of a Single Amide-to-Ester Replacement on Gramicidin Channel Structure and Function journal February 2001
Direct Production of Proteins with N-Terminal Cysteine for Site-Specific Conjugation journal May 2004
Oxidation of nickel thiolate ligands by dioxygen journal March 1993
Probing the Role of Backbone Hydrogen Bonds in Protein–Peptide Interactions by Amide-to-Ester Mutations journal June 2013
Fe(III) and Co(III) Centers with Carboxamido Nitrogen and Modified Sulfur Coordination:  Lessons Learned from Nitrile Hydratase journal February 2004
A novel nickel-containing superoxide dismutase from Streptomyces spp journal September 1996
Subtle Bite-Angle Influences on N 2 S 2 Ni Complexes journal July 2001
An Efficient Fmoc-SPPS Approach for the Generation of Thioester Peptide Precursors for Use in Native Chemical Ligation journal August 2008
Desulfurization of cysteine-containing peptides resulting from sample preparation for protein characterization by mass spectrometry: Desulfurization of cysteine-containing peptides journal January 2010
Probing Variable Axial Ligation in Nickel Superoxide Dismutase Utilizing Metallopeptide-Based Models:  Insight into the Superoxide Disproportionation Mechanism journal November 2007
Probing Variable Amine/Amide Ligation in Ni II N 2 S 2 Complexes Using Sulfur K-Edge and Nickel L-Edge X-ray Absorption Spectroscopies: Implications for the Active Site of Nickel Superoxide Dismutase journal March 2008
Singlet Oxygen and the Production of Sulfur Oxygenates of Nickel(II) and Palladium(II) Thiolates journal April 1997
Amino Terminal Cu(II)- and Ni(II)-Binding (ATCUN) Motif of Proteins and Peptides:  Metal Binding, DNA Cleavage, and Other Properties journal March 1997
Superoxide Dismutase from Escherichia coli B journal November 1970
Modulation of Reactivity in Native Chemical Ligation through the Use of Thiol Additives journal May 1997
Unique Reactivity of a Tetradentate N 2 S 2 Complex of Nickel:  Intermediates in the Production of Sulfur Oxygenates journal April 2002
Bisamidate and Mixed Amine/Amidate NiN 2 S 2 Complexes as Models for Nickel-Containing Acetyl Coenzyme A Synthase and Superoxide Dismutase: An Experimental and Computational Study journal June 2010
Mitochondrial free radical generation, oxidative stress, and aging11This article is dedicated to the memory of our dear friend, colleague, and mentor Lars Ernster (1920–1998), in gratitude for all he gave to us. journal August 2000
Nickel-mediated sequence-specific oxidative cleavage of DNA by a designed metalloprotein journal May 1990
Superoxide Dismutases and Superoxide Reductases journal January 2014
Sequence-specific oxidative cleavage of DNA by a designed metalloprotein, nickel(II).cntdot.GGH(Hin139-190) journal October 1992
Superoxide dismutases—a review of the metal-associated mechanistic variations journal February 2010
Protein Backbone Engineering through Total Chemical Synthesis: New Insight into the Mechanism of HIV-1 Protease Catalysis journal November 2000
Structure of Thiocyanate Hydrolase: A New Nitrile Hydratase Family Protein with a Novel Five-coordinate Cobalt(III) Center journal March 2007
Ni(II) and Co(II) Sensing by Escherichia coli RcnR journal May 2008
Amino Acid Derivatives. I. Carboallyloxy Derivatives of α-Amino Acids 1,2 journal February 1950

Cited By (4)

Oxidation State Dependent Coordination Modes: Accessing an Amidate-Supported Nickel(I) δ-bis(C−H) Agostic Complex journal October 2016
Oxidation State Dependent Coordination Modes: Accessing an Amidate-Supported Nickel(I) δ-bis(C−H) Agostic Complex journal October 2016
1,3-N,O-Complexes of late transition metals. Ligands with flexible bonding modes and reaction profiles journal January 2017
Engineered Metalloenzymes with Non‐Canonical Coordination Environments journal June 2018

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