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Received August 11, 2014
Accepted September 21, 2014
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Molecular characterization of a novel oligoalginate lyase consisting of AlgL and heparinase II/III-like domains from Stenotrophomonas maltophilia KJ-2 and its application to alginate saccharification

Department of Chemical Engineering, Kyung Hee University, Gyeonggy 446-701, Korea 1Department of Food Science and Biotechnology, Kyungsung University, Busan 608-736, Korea
Korean Journal of Chemical Engineering, May 2015, 32(5), 917-924(8), 10.1007/s11814-014-0282-1
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Abstract

Molecular identification and development of a novel recombinant alginate lyase as the biocatalyst for alginate saccharification are prerequisite for bioethanol fermentation from brown seaweed biomass. We identified and characterized a novel oligoalginate lyase for complete degradation of alginate from Stenotrophomonas maltophilia KJ-2 that grow on alginate as the sole carbon source. KJ-2 oligoalginate lyase consisted of AlgL- and heparinase II/III-like domains. The recombinant KJ-2 oligoalginate lyase exhibited substrate preference toward polymannuronate and alginate as well as oligoalginate. The recombinant KJ-2 oligoalginate lyase completely degraded alginate into unsaturated uronate monomer most efficiently at pH 7.5 and 37 oC. Interestingly, AlgL-like recombinant proteins showed more like endolytic activity. The recombinant KJ-2 oligoalginate lyase was a novel oligoalginate lyase consisting of AlgL- and heparinase-like domains and could be used as a candidate for biocatalyst selection to saccharify alginate for bioethanol production from brown seaweed.

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