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Cellulophaga algicola alginate lyase inhibits biofilm formation of a clinical Pseudomonas aeruginosa strain MCC 2081
Author(s) -
Mahajan Sonal,
Ramya Thirumalai Nallan Chakravarthy
Publication year - 2021
Publication title -
iubmb life
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.132
H-Index - 113
eISSN - 1521-6551
pISSN - 1521-6543
DOI - 10.1002/iub.2442
Subject(s) - biofilm , pseudomonas aeruginosa , recombinant dna , microbiology and biotechnology , glycan , lyase , chemistry , linker , in vitro , bacteria , biochemistry , biology , enzyme , glycoprotein , gene , genetics , computer science , operating system
Alginate lyases are potential agents for disrupting alginate‐rich Pseudomonas biofilms in the infected lungs of cystic fibrosis patients but there is as yet no clinically approved alginate lyase that can be used as a therapeutic. We report here the endolytic alginate lyase activity of a recombinant Cellulophaga algicola alginate lyase domain ( Ca Aly) encoded by a gene that also codes for an N‐terminal carbohydrate‐binding module, CBM6, and a central F‐type lectin domain ( Ca FLD). Ca Aly degraded both polyM and polyG alginates with optimal temperature and pH of 37°C and pH 7, respectively, with greater preference for polyG. Recombinant Ca FLD bound to fucosylated glycans with a preference for H‐type 2 glycan motif, and did not have any apparent effect on the enzyme activity of the co‐associated alginate lyase domain in the recombinant protein construct, Ca FLD_Aly. We assessed the potential of Ca Aly and other alginate lyases previously reported in published literature to inhibit biofilm formation by a clinical strain, Pseudomonas aeruginosa MCC 2081. Of all the alginate lyases tested, Ca Aly displayed most inhibition of in vitro biofilm formation on plastic surfaces. We also assessed its inhibitory ability against P. aeruginosa 2081 biofilms formed over a monolayer of A549 lung epithelial cells. Our study indicated that Ca Aly is efficacious in inhibition of biofilm formation even on A549 lung epithelial cell line monolayers.