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Title: Streptomyces wadayamensis MppP Is a Pyridoxal 5'-Phosphate-Dependent L-Arginine α-Deaminase, γ-Hydroxylase in the Enduracididine Biosynthetic Pathway

Abstract

l-Enduracididine (l-End) is a nonproteinogenic amino acid found in a number of bioactive peptides, including the antibiotics teixobactin, enduracidin, and mannopeptimycin. The potent activity of these compounds against antibiotic-resistant pathogens like MRSA and their novel mode of action have garnered considerable interest for the development of these peptides into clinically relevant antibiotics. Here, this goal has been hampered, at least in part, by the fact that l-End is difficult to synthesize and not currently commercially available. We have begun to elucidate the biosynthetic pathway of this unusual building block. In mannopeptimycin-producing strains, like Streptomyces wadayamensis, l-End is produced from l-Arg by the action of three enzymes: MppP, MppQ, and MppR. Herein, we report the structural and functional characterization of MppP. This pyridoxal 5'-phosphate (PLP)-dependent enzyme was predicted to be a fold type I aminotransferase on the basis of sequence analysis. We show that MppP is actually the first example of a PLP-dependent hydroxylase that catalyzes a reaction of l-Arg with dioxygen to yield a mixture of 2-oxo-4-hydroxy-5-guanidinovaleric acid and 2-oxo-5-guanidinovaleric acid in a 1.7:1 ratio. The structure of MppP with PLP bound to the catalytic lysine residue (Lys221) shows that, while the tertiary structure is very similar to those ofmore » the well-studied aminotransferases, there are differences in the arrangement of active site residues around the cofactor that likely account for the unusual activity of this enzyme. The structure of MppP with the substrate analogue d-Arg bound shows how the enzyme binds its substrate and indicates why d-Arg is not a substrate. On the basis of this work and previous work with MppR, we propose a plausible biosynthetic scheme for l-End.« less

Authors:
 [1];  [1];  [1];  [1]
  1. Univ. of Wisconsin, Milwaukee, WI (United States)
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); Michigan Economic Development Corp.; Michigan Technology Tri-Corridor
OSTI Identifier:
1233328
Grant/Contract Number:  
AC02-06CH11357; 085P1000817
Resource Type:
Accepted Manuscript
Journal Name:
Biochemistry
Additional Journal Information:
Journal Volume: 54; Journal Issue: 47; Journal ID: ISSN 0006-2960
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
ENGLISH
Subject:
59 BASIC BIOLOGICAL SCIENCES; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; peptides and proteins; monomers; chemical structure; phosphates; noncovalent interactions

Citation Formats

Han, Lanlan, Schwabacher, Alan W., Moran, Graham R., and Silvaggi, Nicholas R. Streptomyces wadayamensis MppP Is a Pyridoxal 5'-Phosphate-Dependent L-Arginine α-Deaminase, γ-Hydroxylase in the Enduracididine Biosynthetic Pathway. United States: N. p., 2015. Web. doi:10.1021/acs.biochem.5b01016.
Han, Lanlan, Schwabacher, Alan W., Moran, Graham R., & Silvaggi, Nicholas R. Streptomyces wadayamensis MppP Is a Pyridoxal 5'-Phosphate-Dependent L-Arginine α-Deaminase, γ-Hydroxylase in the Enduracididine Biosynthetic Pathway. United States. https://doi.org/10.1021/acs.biochem.5b01016
Han, Lanlan, Schwabacher, Alan W., Moran, Graham R., and Silvaggi, Nicholas R. Mon . "Streptomyces wadayamensis MppP Is a Pyridoxal 5'-Phosphate-Dependent L-Arginine α-Deaminase, γ-Hydroxylase in the Enduracididine Biosynthetic Pathway". United States. https://doi.org/10.1021/acs.biochem.5b01016. https://www.osti.gov/servlets/purl/1233328.
@article{osti_1233328,
title = {Streptomyces wadayamensis MppP Is a Pyridoxal 5'-Phosphate-Dependent L-Arginine α-Deaminase, γ-Hydroxylase in the Enduracididine Biosynthetic Pathway},
author = {Han, Lanlan and Schwabacher, Alan W. and Moran, Graham R. and Silvaggi, Nicholas R.},
abstractNote = {l-Enduracididine (l-End) is a nonproteinogenic amino acid found in a number of bioactive peptides, including the antibiotics teixobactin, enduracidin, and mannopeptimycin. The potent activity of these compounds against antibiotic-resistant pathogens like MRSA and their novel mode of action have garnered considerable interest for the development of these peptides into clinically relevant antibiotics. Here, this goal has been hampered, at least in part, by the fact that l-End is difficult to synthesize and not currently commercially available. We have begun to elucidate the biosynthetic pathway of this unusual building block. In mannopeptimycin-producing strains, like Streptomyces wadayamensis, l-End is produced from l-Arg by the action of three enzymes: MppP, MppQ, and MppR. Herein, we report the structural and functional characterization of MppP. This pyridoxal 5'-phosphate (PLP)-dependent enzyme was predicted to be a fold type I aminotransferase on the basis of sequence analysis. We show that MppP is actually the first example of a PLP-dependent hydroxylase that catalyzes a reaction of l-Arg with dioxygen to yield a mixture of 2-oxo-4-hydroxy-5-guanidinovaleric acid and 2-oxo-5-guanidinovaleric acid in a 1.7:1 ratio. The structure of MppP with PLP bound to the catalytic lysine residue (Lys221) shows that, while the tertiary structure is very similar to those of the well-studied aminotransferases, there are differences in the arrangement of active site residues around the cofactor that likely account for the unusual activity of this enzyme. The structure of MppP with the substrate analogue d-Arg bound shows how the enzyme binds its substrate and indicates why d-Arg is not a substrate. On the basis of this work and previous work with MppR, we propose a plausible biosynthetic scheme for l-End.},
doi = {10.1021/acs.biochem.5b01016},
journal = {Biochemistry},
number = 47,
volume = 54,
place = {United States},
year = {Mon Nov 09 00:00:00 EST 2015},
month = {Mon Nov 09 00:00:00 EST 2015}
}

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