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Experimental and Metabolic Modeling Evidence for a Folate-Cleaving Side-Activity of Ketopantoate Hydroxymethyltransferase (PanB)

Journal Article · · Frontiers in Microbiology
Tetrahydrofolate (THF) and its one-carbon derivatives, collectively termed folates, are essential cofactors, but are inherently unstable. While it is clear that chemical oxidation can cleave folates or damage their pterin precursors, very little is known about enzymatic damage to these molecules or about whether the folate biosynthesis pathway responds adaptively to damage to its end-products. The presence of a duplication of the gene encoding the folate biosynthesis enzyme 6-hydroxymethyl-7,8-dihydropterin pyrophosphokinase (FolK) in many sequenced bacterial genomes combined with a strong chromosomal clustering of the folK gene with panB, encoding the 5,10-methylene-THF-dependent enzyme ketopantoate hydroxymethyltransferase, led us to infer that PanB has a side activity that cleaves 5,10-methylene-THF, yielding a pterin product that is recycled by FolK. Genetic and metabolic analyses of Escherichia coli strains showed that overexpression of PanB leads to accumulation of the likely folate cleavage product 6-hydroxymethylpterin and other pterins in cells and medium, and—unexpectedly—to a 46% increase in total folate content. In silico modeling of the folate biosynthesis pathway showed that these observations are consistent with the in vivo cleavage of 5,10-methylene-THF by a side-activity of PanB, with FolK-mediated recycling of the pterin cleavage product, and with regulation of folate biosynthesis by folates or their damage products.
Research Organization:
Argonne National Laboratory (ANL)
Sponsoring Organization:
National Science Foundation (NSF)
DOE Contract Number:
AC02-06CH11357
OSTI ID:
1393178
Journal Information:
Frontiers in Microbiology, Journal Name: Frontiers in Microbiology Vol. 7; ISSN 1664-302X
Publisher:
Frontiers Research Foundation
Country of Publication:
United States
Language:
English

References (52)

Enzyme Induction as an All-Or-None Phenomenon journal July 1957
Complete set of ORF clones of Escherichia coli ASKA library (A Complete Set of E. coli K-12 ORF Archive): Unique Resources for Biological Research journal January 2006
BioModels: ten-year anniversary journal November 2014
Folate Biosynthesis, Reduction, and Polyglutamylation and the Interconversion of Folate Derivatives journal December 2007
Accessing the SEED Genome Databases via Web Services API: Tools for Programmers journal January 2010
Characterization of theSaccharomyces cerevisiaeFol1 Protein: Starvation for C1 Carrier Induces Pseudohyphal Growth journal August 2004
A complete collection of single‐gene deletion mutants of Acinetobacter baylyi ADP1 journal January 2008
Genomic and experimental evidence for multiple metabolic functions in the RidA/YjgF/YER057c/UK114 (Rid) protein family journal May 2015
Group Contribution Method for Thermodynamic Analysis of Complex Metabolic Networks journal August 2008
Decreased coenzyme A levels in ridA mutant strains of Salmonella enterica result from inactivated serine hydroxymethyltransferase: ridA mutants are deficient in one carbon metabolism journal July 2013
Comparison of Deterministic and Stochastic Models of the lac Operon Genetic Network journal February 2009
Escherichia coli abg Genes Enable Uptake and Cleavage of the Folate Catabolite p-Aminobenzoyl-Glutamate journal February 2007
Absolute metabolite concentrations and implied enzyme active site occupancy in Escherichia coli journal June 2009
FolX and FolM Are Essential for Tetrahydromonapterin Synthesis in Escherichia coli and Pseudomonas aeruginosa journal January 2010
ETE: a python Environment for Tree Exploration journal January 2010
Catalytic Center Assembly of HPPK as Revealed by the Crystal Structure of a Ternary Complex at 1.25 Å Resolution journal October 2000
Metabolite damage and its repair or pre-emption journal January 2013
An Ancient Riboswitch Class in Bacteria Regulates Purine Biosynthesis and One-Carbon Metabolism journal January 2015
Improved M13 phage cloning vectors and host strains: nucleotide sequences of the M13mpl8 and pUC19 vectors journal January 1985
Multiple sequence alignment with hierarchical clustering journal November 1988
COPASI--a COmplex PAthway SImulator journal October 2006
Folate Biosynthesis, Turnover, and Transport in Plants journal June 2011
Elevated Levels of Ketopantoate Hydroxymethyltransferase (PanB) Lead to a Physiologically Significant Coenzyme A Elevation in Salmonella enterica Serovar Typhimurium journal May 2002
The EMBL-EBI bioinformatics web and programmatic tools framework journal April 2015
Organisation of the pantothenate (vitamin B 5 ) biosynthesis pathway in higher plants journal January 2004
Identification of Formaldehyde-induced Modifications in Proteins: REACTIONS WITH MODEL PEPTIDES journal November 2003
Plant B Vitamin Pathways and their Compartmentation: a Guide for the Perplexed journal August 2012
N EW P ERSPECTIVES ON F OLATE C ATABOLISM journal July 2001
MEGA6: Molecular Evolutionary Genetics Analysis Version 6.0 journal October 2013
A role for tetrahydrofolates in the metabolism of iron-sulfur clusters in all domains of life journal May 2010
Two Sample Logo: a graphical representation of the differences between two sets of sequence alignments journal April 2006
Comparative genomics of bacterial and plant folate synthesis and salvage: predictions and validations journal January 2007
WebLogo: A Sequence Logo Generator journal May 2004
BRENDA in 2015: exciting developments in its 25th year of existence journal November 2014
Assessing Systems Properties of Yeast Mitochondria through an Interaction Map of the Organelle journal January 2006
Folate salvage in plants: pterin aldehyde reduction is mediated by multiple non-specific aldehyde reductases: Pterin aldehyde reductase journal June 2007
The Subsystems Approach to Genome Annotation and its Use in the Project to Annotate 1000 Genomes journal September 2005
Stochastic Gene Expression in a Single Cell journal August 2002
The Folylpolyglutamate Synthetase Plastidial Isoform Is Required for Postembryonic Root Development in Arabidopsis journal January 2011
MUSCLE: multiple sequence alignment with high accuracy and high throughput journal March 2004
The Intracellular Concentration of Pyrophosphate in the Batch Culture of Escherichia coli journal October 1982
Tight regulation, modulation, and high-level expression by vectors containing the arabinose PBAD promoter. journal July 1995
KEGG: Kyoto Encyclopedia of Genes and Genomes journal January 2000
ZTP (5-amino 4-imidazole carboxamide riboside 5′-triphosphate): A proposed alarmone for 10-formyl-tetrahydrofolate deficiency journal July 1982
Functional Promiscuity of the COG0720 Family journal October 2011
Variations in metabolic pathways create challenges for automated metabolic reconstructions: Examples from the tetrahydrofolate synthesis pathway journal June 2014
From microbiology to cancer biology: the Rid protein family prevents cellular damage caused by endogenously generated reactive nitrogen species: RidA stress response journal February 2015
The SEED and the Rapid Annotation of microbial genomes using Subsystems Technology (RAST) journal November 2013
Construction of Escherichia coli K-12 in-frame, single-gene knockout mutants the Keio collection journal February 2006
The Protein Data Bank journal January 2000
Folates and one-carbon metabolism in plants and fungi journal June 1997
Gapped BLAST and PSI-BLAST: a new generation of protein database search programs journal September 1997

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