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Biological activities of Lignin hydrolysate-related compounds
( Siseon Lee ),( Ajay Kalanjana Monnappa ),( Robert J. Mitchell ) 생화학분자생물학회 2012 BMB Reports Vol.45 No.5
Lignin hydrolysates contain many different chemical species, including ferulic acid, coumaric acid, vanillic acid, vanillin, syringaldehyde and furfural. From the perspective of biofuels, these compounds are problematic and can cause downstream loss of product if not removed prior to beginning the fermentative process. In contrast, a search for these compounds within the literature turns up many papers where the same compounds have beneficial properties pertaining to human health, including as antioxidants and in cancer prevention, or are involved in bacterial cell-to-cell signaling. Consequently, this article reviews the dual nature of these and other compounds found in lignin hydrolysates, highlighting both their detrimental and beneficial activities. [BMB Reports 2012; 45(5): 265-274]
Current Status of Pseudomonas putida Engineering for Lignin Valorization
Siseon Lee,손정훈,배정훈,Kim Sun Chang,성봉현 한국생물공학회 2020 Biotechnology and Bioprocess Engineering Vol.25 No.6
Lignin, a complex aromatic polymer, is a structural component of plant biomass. It decomposes with difficulty because of its rigidity properties, however, lignin valorization is essential for the economics of lignocellulosic biorefineries. Pseudomonas putida has been extensively investigated as a promising host strain for lignin valorizations due to intrinsic traits, such as low nutritional requirement, high tolerance to toxicity, and metabolic versatility with a wide spectrum of substrates, such as aromatic compounds. Although a naturally occurring, lignin-utilizing P. putida strain has been reported, it is necessary to engineer the genome of P. putida for efficient lignin utilization. For biological lignin valorization, the decomposition of lignin polymer to low-molecular weight compounds and transformation of lignin-derived aromatic compounds to valueadded chemicals is essential. Various tools of synthetic biology have been developed for the genome engineering of P. putida; efforts in metabolic engineering have been made to expand aromatic substrate specificity and to improve productivity of value-added chemicals. Development of high-performance bio-parts and biosensors for lignin valorization has also been done. In this review, we present recent research on genome engineering tools developed for P. putida and metabolic engineering employed in P. putida to improve lignin valorization.