DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Directed Evolution of an Adenylation Domain Alters Substrate Specificity and Generates a New Catechol Siderophore in Escherichia coli

Journal Article · · Biochemistry

Nonribosomal peptide synthetases (NRPS) biosynthesize numerous natural products with therapeutic, agricultural, and industrial significance. Reliably altering substrate selection in these enzymes has been a longstanding goal, as this would enable the production of tailor-made peptides with desired activities. In this study, the NRPS EntF and the associated biosynthesis of the siderophore enterobactin (ENT) were used as a model system to interrogate substrate selection by an adenylation (A) domain. We employed a directed evolution pipeline that harnesses an in vivo genetic selection for siderophore production to alter A domain substrate selection. Surprisingly, this led to the formation of a new, physiologically active catechol siderophore in Escherichia coli. We characterized the enzyme variants in vitro and demonstrated transferability of our findings to the well-studied TycC and GrsB NRPSs. Furthermore, this work identifies critical binding pocket residues that allow for altered substrate selection in our model system and expands upon our understanding of iron acquisition in E. coli.

Research Organization:
Great Lakes Bioenergy Research Center (GLBRC), Madison, WI (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
SC0018409
OSTI ID:
2506699
Journal Information:
Biochemistry, Journal Name: Biochemistry Journal Issue: 23 Vol. 63; ISSN 0006-2960
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (53)

Introduction of a Non-Natural Amino Acid into a Nonribosomal Peptide Antibiotic by Modification of Adenylation Domain Specificity journal June 2012
Characterization of EntF as a serine-activating enzyme: Characterization of EntF as a serine-activating enzyme journal April 1992
Combining the polymerase incomplete primer extension method for cloning and mutagenesis with microscreening to accelerate structural genomics efforts journal January 2008
Targeted alteration of the substrate specificity of peptide synthetases by rational module swapping journal February 1998
Universal chemical assay for the detection and determination of siderophores journal January 1987
Biologically active compounds containing 2,3-duhydroxybenzoic acid and serine formed by Escherichia coli journal March 1970
Aminoacyl-SNACs as small-molecule substrates for the condensation domains of nonribosomal peptide synthetases journal October 2000
Predictive, structure-based model of amino acid recognition by nonribosomal peptide synthetase adenylation domains journal March 2000
Dipeptide formation on engineered hybrid peptide synthetases journal June 2000
Conversion of L-Proline to Pyrrolyl-2-Carboxyl-S-PCP during Undecylprodigiosin and Pyoluteorin Biosynthesis journal February 2002
A new enzyme superfamily — the phosphopantetheinyl transferases journal January 1996
Assembly line enzymology by multimodular nonribosomal peptide synthetases: the thioesterase domain of E. coli EntF catalyzes both elongation and cyclolactonization journal June 1999
The specificity-conferring code of adenylation domains in nonribosomal peptide synthetases journal August 1999
Directed Evolution of a Gatekeeper Domain in Nonribosomal Peptide Synthesis journal October 2011
A Subdomain Swap Strategy for Reengineering Nonribosomal Peptides journal May 2015
Chemical Probes Allow Structural Insight into the Condensation Reaction of Nonribosomal Peptide Synthetases journal March 2016
Characterization of the Functional Variance in MbtH-like Protein Interactions with a Nonribosomal Peptide Synthetase journal September 2017
Alanine Scanning of YbdZ, an MbtH-like Protein, Reveals Essential Residues for Functional Interactions with Its Nonribosomal Peptide Synthetase Partner EntF journal June 2018
Controlling Substrate- and Stereospecificity of Condensation Domains in Nonribosomal Peptide Synthetases journal February 2024
Directed Evolution Reveals the Functional Sequence Space of an Adenylation Domain Specificity Code journal August 2019
Subcloning, expression, and purification of the enterobactin biosynthetic enzyme 2,3-dihydroxybenzoate-AMP ligase: demonstration of enzyme-bound (2,3-dihydroxybenzoyl)adenylate product journal August 1989
Subcloning of the enterobactin biosynthetic gene entB: expression, purification, characterization and substrate specificity of isochorismatase journal February 1990
Exploitation of the Selectivity-Conferring Code of Nonribosomal Peptide Synthetases for the Rational Design of Novel Peptide Antibiotics journal July 2002
Systematic and Quantitative Analysis of Protein−Protein Recognition between Nonribosomal Peptide Synthetases Investigated in the Tyrocidine Biosynthetic Template journal April 2003
MbtH-Like Proteins as Integral Components of Bacterial Nonribosomal Peptide Synthetases journal October 2010
Enterobactin Biosynthesis in Escherichia coli :  Isochorismate Lyase (EntB) Is a Bifunctional Enzyme That Is Phosphopantetheinylated by EntD and Then Acylated by EntE Using ATP and 2,3-Dihydroxybenzoate journal July 1997
Reconstitution and Characterization of the Escherichia coli Enterobactin Synthetase from EntB, EntE, and EntF journal February 1998
Localized Protein Interaction Surfaces on the EntB Carrier Protein Revealed by Combinatorial Mutagenesis and Selection journal July 2006
Nonribosomal Peptide Synthetases Involved in the Production of Medically Relevant Natural Products journal January 2008
Efficient rational modification of non-ribosomal peptides by adenylation domain substitution journal September 2020
Metagenomic domain substitution for the high-throughput modification of nonribosomal peptides journal November 2023
High-throughput reprogramming of an NRPS condensation domain journal February 2024
ColabFold: making protein folding accessible to all journal May 2022
Evolutionary dynamics of natural product biosynthesis in bacteria journal January 2020
A proof-reading mechanism for non-proteinogenic amino acid incorporation into glycopeptide antibiotics journal January 2019
The catechol moiety of obafluorin is essential for antibacterial activity journal January 2023
Export of the siderophore enterobactin in Escherichia coli: involvement of a 43 kDa membrane exporter: Enterobactin secretion journal May 2002
The EntF and EntE adenylation domains of Escherichia coli enterobactin synthetase: Sequestration and selectivity in acyl-AMP transfers to thiolation domain cosubstrates journal February 2000
A protein interaction surface in nonribosomal peptide synthesis mapped by combinatorial mutagenesis and selection journal March 2006
Computational structure-based redesign of enzyme activity journal February 2009
Construction of hybrid peptide synthetases by module and domain fusions journal May 2000
Structures of a Nonribosomal Peptide Synthetase Module Bound to MbtH-like Proteins Support a Highly Dynamic Domain Architecture journal September 2016
Structural basis for the activation of phenylalanine in the non-ribosomal biosynthesis of gramicidin S journal July 1997
The Landscape of Recombination Events That Create Nonribosomal Peptide Diversity journal January 2021
Aminoacyl-CoAs as Probes of Condensation Domain Selectivity in Nonribosomal Peptide Synthesis journal April 1999
Rational design of peptide antibiotics by targeted replacement of bacterial and fungal domains journal July 1995
Evolution-inspired engineering of nonribosomal peptide synthetases journal March 2024
Iron-regulated outer membrane proteins of Escherichia coli K-12 and mechanism of action of catechol-substituted cephalosporins journal December 1988
Biosynthesis of Novel Pyoverdines by Domain Substitution in a Nonribosomal Peptide Synthetase of Pseudomonas aeruginosa journal July 2014
Gramicidin S biosynthesis operon containing the structural genes grsA and grsB has an open reading frame encoding a protein homologous to fatty acid thioesterases journal October 1989
Cir and Fiu proteins in the outer membrane of Escherichia coli catalyze transport of monomeric catechols: study with beta-lactam antibiotics containing catechol and analogous groups journal March 1990
The tyrocidine biosynthesis operon of Bacillus brevis: complete nucleotide sequence and biochemical characterization of functional internal adenylation domains. journal January 1997
Specificity and mechanism of TonB-dependent ferric catecholate uptake by Fiu journal March 2024