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Biotechnol Lett. 2012 Jun;34(6):1087-92. doi: 10.1007/s10529-012-0876-9. Epub 2012 Mar 4.

Characterization of a recombinant endo-type alginate lyase (Alg7D) from Saccharophagus degradans.

Author information

1
School of Life Sciences and Biotechnology, Korea University, Seoul, Korea.

Abstract

A gene, alg7D, from Saccharophagus degradans, coding for a putative alginate lyase belonging to the family of polysaccharide lyase-7, was overexpressed in Escherichia coli. The properties of the recombinant Alg7D were characterized. The enzyme endolytically depolymerized alginate by β-elimination into oligo-alginates with degrees of polymerization of 2-5. Its activity was maximal at 50°C and pH 7 and was slightly increased in the presence of Na(+). The K(M), V(max), k(cat), and k(cat)/K(M) values were: 3 mg ml(-1), 6.2 U mg(-1), 1.9 × 10(-2) s(-1), and 6.3 × 10(-3) mg(-1 )ml s(-1), respectively.

PMID:
22391735
DOI:
10.1007/s10529-012-0876-9
[Indexed for MEDLINE]

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