Transformation of Lignin -Derived Aromatics into Nonaromatic Polymeric Substances with Fluorescent Activities (NAPSFA) by Pseudomonas sp. ITH-SA-1

Significance Statement

Lignin is considered an underutilized natural biomass, and efficient and economical techniques are required for the total transformation of lignin into high-value products. In this study, the bacteria capable of transforming lignin-derived aromatics into functional, beneficial, or economically valuable compounds from the seawater after the Great East Japan Earthquake-caused tsunami were isolated. One of the isolates, Pseudomonas sp. ITH-SA-1, produced novel non-aromatic polymeric substances with fluorescent activity (NAPSFA) from the lignin-derived aromatic.

This research includes three keys for scientific importance: 1) NAPSFA are organic chemically rare fluorescent substances. This finding is surprising in view of the fact that fluorescence is typically associated with aromatic organic compound. Despite the absence of aromatic molecule’s structure, NAPSFA has a fluorescent activity. 2) NAPSFA are organic-conjugated polymers with light-emitting. Such polymers are known to be usefully utilized in the optoelectronic and electrochemical fields. 3) NAPSFA are produced from lignin-derived aromatics through bioconversion. These information will contribute to the development of new basic techniques for effective utilization of lignin and lignin-derived aromatic using biotechnology.

The authors believe that the discoveries made in the study will assist in the long-term recovery and reconstruction of the area affected by tsunami following the Great East Japan Earthquake, and contribute to the recovery effort by enhancing the growth of an industry devoted to the development of novel application.

 

About the author

Dr. Hiroshi Matsufuji is an associate professor of Department of Food Bioscience and Biotechnology, College of Bioresorce Sciences, Nihon University, Japan. His research interests include analytical chemistry and natural products chemistry, with a particular focus on the chemical structures and function of natural colorants.

About the author

Dr. Noriyuki Iwabuchi is an associate professor of Department of Applied Biological Science, College of Bioresorce Sciences, Nihon University, Japan. His research interests include environmental and applied microbiology, with a particular focus on the effective utilization of lignin-derived aromatics by biotransformation.

 Transformation of Lignin-Derived Aromatics into Nonaromatic Polymeric Substances with Fluorescent Activities (NAPSFA) by Pseudomonas sp. ITH-SA-1-renewable energy global innovations

 

Journal Reference

ACS Sustainable Chem. Eng., 2015, 3 (11), pp 2678–2685.

Noriyuki Iwabuchi*1, Hajime Takiguchi1, Takashi Hamaguchi1, Hayato Takihara1, Michio Sunairi1, Hiroshi Matsufuji*2

Show Affiliations
  1. Department of Applied Biological Science, College of Bioresource Sciences,Nihon University, 1866 Kameino, Fujisawa, Kanagawa 252-0880, Japan
  2. Department of Food Bioscience and Biotechnology, College of Bioresource Sciences,Nihon University, 1866 Kameino, Fujisawa, Kanagawa 252-0880, Japan

Abstract

We examined bacteria capable of transforming lignin-derived compounds into industrially or economically valuable substances from the seawater after the Great East Japan Earthquake-caused tsunami. Pseudomonas sp. ITH-SA-1 produced water-soluble fluorescent substances from the lignin-derived aromatic, syringaldehyde (SYAL). They: are polymeric substances derived from 3-O-methyl gallate produced through transformation of syringaldehyde via syringate; are not known compounds reported previously; have excitation/emission peaks at 365/498 nm, respectively; and have an average molecular weight of 7.2 kDa. Despite the fact that aromatic structure generally plays an important role in the planarity and rigidity of organic fluorescent substance, the spectroscopic analyses revealed that aromatic rings were not detected in the molecules. Their activity is particularly rare and the biotransforming capabilities will contribute to the development of new basic techniques for the effective utilization of lignin.

Copyright © 2015 American Chemical Society.

Go To ACS Sustainable Chem. Eng

 

 

Check Also

Bimetallic Cu-Ni catalysts supported on MCM-41 and Ti-MCM-41 porous materials- renewable energy global innovations

Bimetallic Cu-Ni catalysts supported on MCM-41 and Ti-MCM-41 porous materials for hydrodeoxygenation of lignin model compound into transportation fuels