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

Title: Exoproteomics Reveals Outer Membrane Vesicle Mediated Catabolism of Lignin-Derived Aromatics by P. putida KT2440

Abstract

Lignin is an abundant component of plant cell walls which is heterogeneous and highly resistant to degradation. Biological funneling of lignin via microbes represents an efficient approach for reducing chemical heterogeneity and generating molecules which can be valorized into performance-advantaged materials. Pseudomonas putida KT2440 (P. putida) catabolizes lignin-derived aromatic monomers rapidly and efficiently via the b-ketoadipate (bKA) pathway and our data suggest P. putida may depolymerize HMW lignin as well [1]. The mechanism by which HMW lignin is depolymerized by bacteria remains unknown. Intriguingly, we found that P. putida secretes outer membrane vesicles (OMVs) of two distinct sizes in the presence of lignin. Here, we describe the temporal proteome of OMVs and the vesicle-free secretome (VFS) in the presence or absence of lignin. Enzymes involved in aromatic catabolism via the bKA pathway are temporally enriched into OMVs in the presence of lignin. Isolated OMVs enhance growth of P. putida mutants unable to grow on model lignin-derived aromatics, and turnover protocatechuic acid in vitro. Together, this work leads us to hypothesize mechanisms by which OMVs contribute to extracellular aromatic catabolism by P. putida. Ongoing and future work seeks to further understand this phenomena in the context of both fundamental an appliedmore » lignin conversion research areas.« less

Authors:
ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [1];  [2];  [2];  [2];  [3];  [3]; ORCiD logo [1]
  1. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
  2. Oak Ridge National Laboratory
  3. Argonne National Laboratory
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
OSTI Identifier:
1606131
Report Number(s):
NREL/PO-5100-74567
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: Presented at the 17th International Conference on Pseudomonas, 22-26 July 2019, Kuala Lumpur, Malaysia
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; lignin conversion; lignin depolymerization; lignin valorization; Pseudomonas putida

Citation Formats

Werner, Allison J, Salvachua Rodriguez, Davinia, Donohoe, Bryon S, Pardo Mendoza, Isabel, Abraham, Paul, Giannone, Rich, Hettich, Bob, Michalska, Martyna, Laible, Phil, and Beckham, Gregg T. Exoproteomics Reveals Outer Membrane Vesicle Mediated Catabolism of Lignin-Derived Aromatics by P. putida KT2440. United States: N. p., 2020. Web.
Werner, Allison J, Salvachua Rodriguez, Davinia, Donohoe, Bryon S, Pardo Mendoza, Isabel, Abraham, Paul, Giannone, Rich, Hettich, Bob, Michalska, Martyna, Laible, Phil, & Beckham, Gregg T. Exoproteomics Reveals Outer Membrane Vesicle Mediated Catabolism of Lignin-Derived Aromatics by P. putida KT2440. United States.
Werner, Allison J, Salvachua Rodriguez, Davinia, Donohoe, Bryon S, Pardo Mendoza, Isabel, Abraham, Paul, Giannone, Rich, Hettich, Bob, Michalska, Martyna, Laible, Phil, and Beckham, Gregg T. 2020. "Exoproteomics Reveals Outer Membrane Vesicle Mediated Catabolism of Lignin-Derived Aromatics by P. putida KT2440". United States. https://www.osti.gov/servlets/purl/1606131.
@article{osti_1606131,
title = {Exoproteomics Reveals Outer Membrane Vesicle Mediated Catabolism of Lignin-Derived Aromatics by P. putida KT2440},
author = {Werner, Allison J and Salvachua Rodriguez, Davinia and Donohoe, Bryon S and Pardo Mendoza, Isabel and Abraham, Paul and Giannone, Rich and Hettich, Bob and Michalska, Martyna and Laible, Phil and Beckham, Gregg T},
abstractNote = {Lignin is an abundant component of plant cell walls which is heterogeneous and highly resistant to degradation. Biological funneling of lignin via microbes represents an efficient approach for reducing chemical heterogeneity and generating molecules which can be valorized into performance-advantaged materials. Pseudomonas putida KT2440 (P. putida) catabolizes lignin-derived aromatic monomers rapidly and efficiently via the b-ketoadipate (bKA) pathway and our data suggest P. putida may depolymerize HMW lignin as well [1]. The mechanism by which HMW lignin is depolymerized by bacteria remains unknown. Intriguingly, we found that P. putida secretes outer membrane vesicles (OMVs) of two distinct sizes in the presence of lignin. Here, we describe the temporal proteome of OMVs and the vesicle-free secretome (VFS) in the presence or absence of lignin. Enzymes involved in aromatic catabolism via the bKA pathway are temporally enriched into OMVs in the presence of lignin. Isolated OMVs enhance growth of P. putida mutants unable to grow on model lignin-derived aromatics, and turnover protocatechuic acid in vitro. Together, this work leads us to hypothesize mechanisms by which OMVs contribute to extracellular aromatic catabolism by P. putida. Ongoing and future work seeks to further understand this phenomena in the context of both fundamental an applied lignin conversion research areas.},
doi = {},
url = {https://www.osti.gov/biblio/1606131}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Mar 23 00:00:00 EDT 2020},
month = {Mon Mar 23 00:00:00 EDT 2020}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: