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Title: The N-terminal Domain of Escherichia coli Assimilatory NADPH-Sulfite Reductase Hemoprotein Is an Oligomerization Domain That Mediates Holoenzyme Assembly

Journal Article · · Journal of Biological Chemistry
 [1];  [1];  [1];  [2];  [3];  [4];  [1]
  1. Florida State Univ., Tallahassee, FL (United States)
  2. Florida State Univ., Tallahassee, FL (United States); National High Magnetic Field Lab. (MagLab), Tallahassee, FL (United States)
  3. National High Magnetic Field Lab. (MagLab), Tallahassee, FL (United States)
  4. Illinois Inst. of Technology, Chicago, IL (United States)

Assimilatory NADPH-sulfite reductase (SiR) from Escherichia coli is a structurally complex oxidoreductase that catalyzes the six-electron reduction of sulfite to sulfide. Two subunits, one a flavin-binding flavoprotein (SiRFP, the α subunit) and the other an iron-containing hemoprotein (SiRHP, the β subunit), assemble to make a holoenzyme of about 800 kDa. How the two subunits assemble is not known. The iron-rich cofactors in SiRHP are unique because they are a covalent arrangement of a Fe4S4 cluster attached through a cysteine ligand to an iron-containing porphyrinoid called siroheme. The link between cofactor biogenesis and SiR stability is also ill-defined. By use of hydrogen/deuterium exchange and biochemical analysis, we show that the α8β4 SiR holoenzyme assembles through the N terminus of SiRHP and the NADPH binding domain of SiRFP. By use of small angle x-ray scattering, we explore the structure of the SiRHP N-terminal oligomerization domain. We additionally report a novel form of the hemoprotein that occurs in the absence of its cofactors. Apo-SiRHP forms a homotetramer, also dependent on its N terminus, that is unable to assemble with SiRFP. Finally, from these results, we propose that homotetramerization of apo-SiRHP serves as a quality control mechanism to prevent formation of inactive holoenzyme in the case of limiting cellular siroheme.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1418603
Journal Information:
Journal of Biological Chemistry, Vol. 290, Issue 31; ISSN 0021-9258
Publisher:
American Society for Biochemistry and Molecular BiologyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

References (55)

Further Evidence on the Equilibrium “Pre-molten Globule State”: Four-state Guanidinium Chloride-induced Unfolding of Carbonic Anhydrase B at Low Temperature journal January 1996
Cofactor-Induced Refolding:  Refolding of Molten Globule Carbonic Anhydrase Induced by Zn(II) and Co(II) journal March 2001
Global Rigid Body Modeling of Macromolecular Complexes against Small-Angle Scattering Data journal August 2005
A switch III motif relays signaling between a B12 enzyme and its G-protein chaperone journal July 2013
CRYSOL – a Program to Evaluate X-ray Solution Scattering of Biological Macromolecules from Atomic Coordinates journal December 1995
A Simplifed Functional Version of the Escherichia coli Sulfite Reductase journal September 2000
Construction of Escherichia coli K-12 in-frame, single-gene knockout mutants the Keio collection journal February 2006
Mutational analysis of human eIF4AIII identifies regions necessary for exon junction complex formation and nonsense-mediated mRNA decay journal March 2006
High-Performance Mass Spectrometry: Fourier Transform Ion Cyclotron Resonance at 14.5 Tesla journal June 2008
Elimination of axial ejection during excitation with a capacitively coupled open trapped-ion cell for Fourier transform ion cyclotron resonance mass spectrometry journal January 1992
Iron-Sulfur Cluster Biogenesis in Chloroplasts. Involvement of the Scaffold Protein CpIscA journal May 2005
Electrically Compensated Fourier Transform Ion Cyclotron Resonance Cell for Complex Mixture Mass Analysis journal September 2011
Advantages of High Magnetic Field for Fourier Transform Ion Cyclotron Resonance Mass Spectrometry journal November 1996
Blue silver: A very sensitive colloidal Coomassie G-250 staining for proteome analysis journal May 2004
The Copper Chaperone CCS Directly Interacts with Copper/Zinc Superoxide Dismutase journal September 1998
Improved ion extraction from a linear octopole ion trap: SIMION analysis and experimental demonstration journal November 2002
The octahaem MccA is a haem c–copper sulfite reductase journal February 2015
Flavin Mononucleotide-Binding Domain of the Flavoprotein Component of the Sulfite Reductase from Escherichia coli journal May 1997
Structure of Spinach Nitrite Reductase:  Implications for Multi-electron Reactions by the Iron−Sulfur:Siroheme Cofactor , journal December 2005
UCSF Chimera?A visualization system for exploratory research and analysis journal January 2004
Sulfite Reductase Structure at 1.6  : Evolution and Catalysis for Reduction of Inorganic Anions journal October 1995
Mutational Analysis of Sulfite Reductase Hemoprotein Reveals the Mechanism for Coordinated Electron and Proton Transfer journal November 2012
Iron–sulfur cluster biosynthesis journal November 2008
The Flavoprotein Component of the Escherichia coli Sulfite Reductase: Expression, Purification, and Spectral and Catalytic Properties of a Monomeric Form Containing both the Flavin Adenine Dinucleotide and the Flavin Mononucleotide Cofactors journal April 1998
The Structure of Holo and Metal-deficient Wild-type Human Cu, Zn Superoxide Dismutase and its Relevance to Familial Amyotrophic Lateral Sclerosis journal May 2003
Molecular characterization of the cysJIH promoters of Salmonella typhimurium and Escherichia coli: regulation by cysB protein and N-acetyl-L-serine. journal January 1989
Spinach siroheme enzymes: isolation and characterization of ferredoxin-sulfite reductase and comparison of properties with ferredoxin-nitrite reductase journal June 1982
Transcriptional control of the cysG gene of Escherichia coli K-12 during aerobic and anaerobic growth journal July 1990
A two-dimensional quadrupole ion trap mass spectrometer journal June 2002
The FNR-like domain of the Escherichia coli sulfite reductase flavoprotein component: crystallization and preliminary X-ray analysis journal January 1998
Solution Structure of the Sulfite Reductase Flavodoxin-like Domain from Escherichia coli , journal June 2005
Structures of the Siroheme- and Fe 4 S 4 -Containing Active Center of Sulfite Reductase in Different States of Oxidation:  Heme Activation via Reduction-Gated Exogenous Ligand Exchange , journal October 1997
Advanced ensemble modelling of flexible macromolecules using X-ray solution scattering journal February 2015
Studies of the molten globule state of ferredoxin: Structural characterization and implications on protein folding and iron-sulfur center assembly journal May 2007
Human Methionine Synthase Reductase, a Soluble P-450 Reductase-like Dual Flavoprotein, Is Sufficient for NADPH-dependent Methionine Synthase Activation journal July 2001
New developments in the ATSAS program package for small-angle scattering data analysis journal March 2012
The Escherichia coli cysG promoter belongs to the ‘extended −10’ class of bacterial promoters journal December 1993
Regulation of transcription initiation at the Escherichia coli nir operon promoter: a new mechanism to account for co-dependence on two transcription factors journal February 1998
The relationship between structure and function for the sulfite reductases journal December 1996
External accumulation of ions for enhanced electrospray ionization fourier transform ion cyclotron resonance mass spectrometry journal September 1997
Four crystal structures of the 60 kDa flavoprotein monomer of the sulfite reductase indicate a disordered flavodoxin-like module 1 1Edited by R. Huber journal May 2000
Probing the Catalytic Mechanism of Sulfite Reductase by X-ray Crystallography:  Structures of the Escherichia coli Hemoprotein in Complex with Substrates, Inhibitors, Intermediates, and Products , journal October 1997
Human recombinant [C22A] FK506-binding protein amide hydrogen exchange rates from mass spectrometry match and extend those from NMR journal October 1997
Structures of the Human Pyruvate Dehydrogenase Complex Cores: A Highly Conserved Catalytic Center with Flexible N-Terminal Domains journal January 2008
NarJ is a specific chaperone required for molybdenum cofactor assembly in nitrate reductase A of Escherichia coli journal April 1998
Comparison and interconversion of the two most common frequency-to-mass calibration functions for Fourier transform ion cyclotron resonance mass spectrometry journal January 2000
Three-dimensional structure of NADPH-cytochrome P450 reductase: Prototype for FMN- and FAD-containing enzymes journal August 1997
Space charge effects in Fourier transform mass spectrometry. II. Mass calibration journal December 1984
Conformational Changes of NADPH-Cytochrome P450 Oxidoreductase Are Essential for Catalysis and Cofactor Binding journal February 2011
Biogenesis of iron-sulfur clusters in mammalian cells: new insights and relevance to human disease journal March 2012
The BioCAT undulator beamline 18ID: a facility for biological non-crystalline diffraction and X-ray absorption spectroscopy at the Advanced Photon Source journal August 2004
High-level expression of Escherichia coli NADPH-sulfite reductase: requirement for a cloned cysG plasmid to overcome limiting siroheme cofactor. journal January 1991
Regulation of the HscA ATPase Reaction Cycle by the Co-chaperone HscB and the Iron-Sulfur Cluster Assembly Protein IscU journal October 2004
Determination of molecular weights and frictional ratios of proteins in impure systems by use of gel filtration and density gradient centrifugation. Application to crude preparations of sulfite and hydroxylamine reductases journal February 1966
Crystal Structure of the FAD/NADPH-binding Domain of Rat Neuronal Nitric-oxide Synthase: COMPARISONS WITH NADPH-CYTOCHROME P450 OXIDOREDUCTASE journal July 2001

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