IIT-G Succeeds in Breaking down Woody Biomass for Conversion to Bioethanol Fuel

BioChemicals/Renewable Chemicals, Feedstocks, Field/Orchard/Plantation Crops/Residues, Forestry/Wood/Residues/Waste, India, Portugal, Process, R & D Focus, Sustainability, University/College Programs

January 2, 2023

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(The Meghalayan Bureau) The IIT Guwahati scientists have shown the efficacy of a new type of endoglucanase called RfGH5_4 in breaking down lignocellulosic and hemicellulosic biomass for the eventual conversion to bioethanol fuel.

Researchers of Indian Institute of Technology (IIT) Guwahati have studied the efficacy of a specific bacterial endoglucanase enzyme, RfGH5_4 from Ruminococcus flavefaciens in breaking down woody biomatter into a simple sugar that can be fermented efficiently to produce bioethanol – a promising renewable fuel that can replace petroleum-based fuel systems.

A team led by Prof. Arun Goyal, Dept of Biosciences and Bioengineering, IIT Guwahati, in collaboration with researchers from the University of Lisbon, Portugal have recently published the discovery and observations of the research in the International Journal of Biological Macromolecules.

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The IIT Guwahati scientists have shown the efficacy of a new type of endoglucanase called RfGH5_4 in breaking down lignocellulosic and hemicellulosic biomass for the eventual conversion to bioethanol fuel. The enzyme was derived from a bacterium called Ruminococcus flavefaciens.

The IIT Guwahati team chose Ruminococcus flavefaciens because this bacterium is found in the gut of cows and other cud-chewing animals which have faced cellulosic pressure for millions of years. The particular gene encoding the cellulase enzyme, RfGH5_4 was fished out from R flavefaciens.

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The bacterium harbours a cohort of at least 14 different multimodular enzymes that can break down cellulose, one of which is RfGH5_4.

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” … Our studies also showed that this enzyme acted on lignocellulosic substrates from different agricultural residues such as cotton stalk, sorghum stalk, sugarcane bagasse, etc. and had a good affinity for hemicellulosic substrates as well which include ß-glucan, lichenan, xyloglucan, konjac glucomannan, xylan and carob galactomannan.” (Prof Arun Goyal) READ MORE

Multifunctionality and mechanism of processivity of family GH5 endoglucanase, RfGH5_4 from Ruminococcus flavefaciens on lignocellulosic polymers (International Journal of Biological Macromolecules)

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