skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Structural insights into the catalytic mechanism of a sacrificial sulfur insertase of the N-type ATP pyrophosphatase family, LarE

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America
 [1];  [2]; ORCiD logo [1];  [1]
  1. Michigan State Univ., East Lansing, MI (United States)
  2. Michigan State Univ., East Lansing, MI (United States); Univ. catholique de Louvain, Louvain-La-Neuve (Belgium)

The lar operon in Lactobacillus plantarum encodes five Lar proteins (LarA/B/C/D/E) that collaboratively synthesize and incorporate a niacin-derived Ni-containing cofactor into LarA, an Ni-dependent lactate racemase. Previous studies have established that two molecules of LarE catalyze successive thiolation reactions by donating the sulfur atom of their exclusive cysteine residues to the substrate. Here, the catalytic mechanism of this very unusual sulfur-sacrificing reaction remains elusive. In this work, we present the crystal structures of LarE in ligand-free and several ligand-bound forms, demonstrating that LarE is a member of the N-type ATP pyrophosphatase (PPase) family with a conserved N-terminal ATP PPase domain and a unique C-terminal domain harboring the putative catalytic site. Structural analysis, combined with structure-guided mutagenesis, leads us to propose a catalytic mechanism that establishes LarE as a paradigm for sulfur transfer through sacrificing its catalytic cysteine residue.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Science Foundation (NSF)
Grant/Contract Number:
CHE-1516126
OSTI ID:
1419864
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Vol. 114, Issue 34; ISSN 0027-8424
Publisher:
National Academy of SciencesCopyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 22 works
Citation information provided by
Web of Science

References (32)

Nickel-pincer cofactor biosynthesis involves LarB-catalyzed pyridinium carboxylation and LarE-dependent sacrificial sulfur insertion journal April 2016
iMOSFLM : a new graphical interface for diffraction-image processing with MOSFLM journal March 2011
Nickel pincer model of the active site of lactate racemase involves ligand participation in hydride transfer journal January 2017
A tethered niacin-derived pincer complex with a nickel-carbon bond in lactate racemase journal July 2015
Clustal W and Clustal X version 2.0 journal September 2007
Features and development of Coot journal March 2010
Structure-Based Characterization of Multiprotein Complexes journal July 2014
Dendroscope 3: An Interactive Tool for Rooted Phylogenetic Trees and Networks journal September 2012
Substrate Specificity and Oligomerization of Human GMP Synthetase journal November 2013
The crystal structure of GMP synthetase reveals a novel catalytic triad and is a structural paradigm for two enzyme families journal January 1996
Nickel-dependent metalloenzymes journal February 2014
Alternative Mechanistic Strategy for Enzyme Catalysis in a Ni-Dependent Lactate Racemase (LarA): Intermediate Destabilization by the Cofactor journal December 2016
PHENIX: a comprehensive Python-based system for macromolecular structure solution journal January 2010
How good are my data and what is the resolution? journal June 2013
Saccharomyces cerevisiae THI4p is a suicide thiamine thiazole synthase journal October 2011
Data growth and its impact on the SCOP database: new developments journal December 2007
SWISS-MODEL: modelling protein tertiary and quaternary structure using evolutionary information journal April 2014
MMDB and VAST+: tracking structural similarities between macromolecular complexes journal December 2013
Lactate racemase is a nickel-dependent enzyme activated by a widespread maturation system journal April 2014
PDBsum additions journal October 2013
A twisted base? The role of arginine in enzyme-catalyzed proton abstractions journal January 2005
UCSF Chimera?A visualization system for exploratory research and analysis journal January 2004
Sulfotransferases, sulfatases and formylglycine-generating enzymes: a sulfation fascination journal October 2008
XDSAPP2.0 journal April 2016
The Nickel-Pincer Complex in Lactate Racemase Is an Electron Relay and Sink that acts through Proton-Coupled Electron Transfer journal February 2017
Development of Chemically Defined Media Supporting High-Cell-Density Growth of Lactococci, Enterococci, and Streptococci journal December 2008
The Nickel-Pincer Complex in Lactate Racemase Is an Electron Relay and Sink that acts through Proton-Coupled Electron Transfer journal February 2017
PARP1 exhibits enhanced association and catalytic efficiency with γH2A.X-nucleosome journal December 2019
Cavin1 intrinsically disordered domains are essential for fuzzy electrostatic interactions and caveola formation journal February 2021
Complete Genome Sequence of Clostridium botulinum CJ0611A1, a Type A(B) Isolate Associated with an International Outbreak of Botulism from Commercial Carrot Juice journal January 2021
SWISS-MODEL: modelling protein tertiary and quaternary structure using evolutionary information text January 2014
PHENIX: a comprehensive Python-based system for macromolecular structure solution. text January 2010

Cited By (5)

Functional Models of the Nickel Pincer Nucleotide Cofactor of Lactate Racemase journal November 2019
Functional Models of the Nickel Pincer Nucleotide Cofactor of Lactate Racemase journal November 2019
Targeting adenylate-forming enzymes with designed sulfonyladenosine inhibitors journal April 2019
Biosynthesis of the nickel-pincer nucleotide cofactor of lactate racemase requires a CTP-dependent cyclometallase journal June 2018
A structural perspective on the PP-loop ATP pyrophosphatase family journal October 2018