Bacterial catabolism of lignin-derived aromatics: New findings in a recent decade: Update on bacterial lignin catabolism.
Naofumi Kamimura,Kenji Takahashi,Kosuke Mori,Takuma Araki,Masaya Fujita,Yudai Higuchi,Eiji Masai +6 more
TLDR
Recent progress in bacterial catabolic systems for lignin-derived aromatic compounds, including newly identified catabolic pathways and genes for decomposition of lignIn-derived biaryls, transcriptional regulation and substrate uptake systems are summarized.Abstract:
Lignin is the most abundant phenolic polymer; thus, its decomposition by microorganisms is fundamental to carbon cycling on earth. Lignin breakdown is initiated by depolymerization catalysed by extracellular oxidoreductases secreted by white-rot basidiomycetous fungi. On the other hand, bacteria play a predominant role in the mineralization of lignin-derived heterogeneous low-molecular-weight aromatic compounds. The outline of bacterial catabolic pathways for lignin-derived bi- and monoaryls are typically composed of the following sequential steps: (i) funnelling of a wide variety of lignin-derived aromatics into vanillate and syringate, (ii) O demethylation of vanillate and syringate to form catecholic derivatives and (iii) aromatic ring-cleavage of the catecholic derivatives to produce tricarboxylic acid cycle intermediates. Knowledge regarding bacterial catabolic systems for lignin-derived aromatic compounds is not only important for understanding the terrestrial carbon cycle but also valuable for promoting the shift to a low-carbon economy via biological lignin valorisation. This review summarizes recent progress in bacterial catabolic systems for lignin-derived aromatic compounds, including newly identified catabolic pathways and genes for decomposition of lignin-derived biaryls, transcriptional regulation and substrate uptake systems. Recent omics approaches on catabolism of lignin-derived aromatic compounds are also described.read more
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Recent advances in lignin valorization with bacterial cultures: microorganisms, metabolic pathways, and bio-products
TL;DR: Recent advances in lignin valorization using bacteria are critically reviewed, including lign in-degrading bacteria that are able to degrade lignine and use lignIn-associated aromatics, various associated metabolic pathways, and application of bacterial cultures for ligninginValorization.
Journal ArticleDOI
Advances in microbial lignin degradation and its applications.
TL;DR: This review focuses on microbial enzymes that are responsible for lignin degradation and on their applications to biological lignocellulosic biomass pretreatment and biotechnological lign in engineering.
Journal ArticleDOI
Innovative Chemicals and Materials from Bacterial Aromatic Catabolic Pathways
Christopher W. Johnson,Davinia Salvachúa,Nicholas A. Rorrer,Brenna A. Black,Derek R. Vardon,Peter C. St. John,Nicholas S. Cleveland,Graham Dominick,Joshua R. Elmore,Nicholas J. Grundl,Payal Khanna,Chelsea R. Martinez,William E. Michener,Darren J. Peterson,Kelsey J. Ramirez,Priyanka Singh,Todd A. VanderWall,A. Nolan Wilson,Xiunan Yi,Mary J. Biddy,Yannick J. Bomble,Adam M. Guss,Gregg T. Beckham +22 more
TL;DR: This work has engineered Pseudomonas putida KT2440 to convert these aromatic compounds to 15 catabolic intermediates that exhibit substantial chemical diversity and produce materials from three compounds to illustrate the potential for realizing performance-advantaged properties relative to petroleum-derived analogs.
Journal ArticleDOI
Phenolic cross-links: building and de-constructing the plant cell wall
Ewelina Mnich,Nanna Bjarnholt,Aymerick Eudes,Aymerick Eudes,Jesper Harholt,Claire Holland,Bodil Jørgensen,Flemming H. Larsen,Ming Liu,Renil Manat,Anne S. Meyer,Jørn Dalgaard Mikkelsen,Mohammed Saddik Motawia,Jan Muschiol,Birger Lindberg Møller,Svenning Rune Møller,Alixander Perzon,Bent O. Petersen,Jonas Laukkonen Ravn,Peter Ulvskov +19 more
TL;DR: This review summarizes current knowledge on the intra- and extracellular acylation of polysaccharides, and inter- and intra-molecular cross-linking of different constituents.
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Consolidated bio-saccharification: Leading lignocellulose bioconversion into the real world.
TL;DR: Consolidated bio-saccharification (CBS), a consolidated bioprocessing (CBP) derived strategy, is herein proposed for lignocellulose bioconversion by integrating enzyme production and hydrolysis steps but separating fermentation from the integrated process.
References
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Lignins: Natural polymers from oxidative coupling of 4-hydroxyphenyl- propanoids
John Ralph,Knut Lundquist,Gösta Brunow,Fachuang Lu,Hoon Kim,Paul F. Schatz,Jane M. Marita,Ronald D. Hatfield,Sally A. Ralph,Jorgen Holst Christensen,Wout Boerjan +10 more
TL;DR: A recent challenge to the currently accepted theory of chemically controlled lignification, attempting to bring lignin into line with more organized biopolymers such as proteins, is logically inconsistent with the most basic details of the structure.