ArticleBioprocess and biosystems engineering2026
Exploitation of Vibrio alginolyticus Mo245 as a dual producer of a glycosaminoglycan and poly(3-hydroxybutyrate) from glycerol.
Article in Bioprocess and biosystems engineering, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
In the present work, the marine bacterium Vibrio alginolyticus Mo245 demonstrated the ability to secrete an extracellular polysaccharide (EPS) concomitant with the intracellular accumulation of a polyhydroxyalkanoate (PHA). Upon cultivation in glycerol as the sole carbon source, V. alginolyticus Mo245 co-produced a glycosaminoglycan (GAG), named EPS-Mo245, and the homopolymer poly(3-hydroxybutyrate) (P3HB), attaining maximum concentrations of 1.29±0.01 g/L and 1.78±0.00 g/L, respectively, within a 24 h cultivation. EPS-Mo245 was a hyaluronic acid (HA)-like GAG, composed of glucuronic acid (40.5±2.2 mol%), galactosamine (29.8±0.2 mol%), and glucosamine (21.1±0.6 mol%). It presented an average molecular weight (Mw) of 1945±67 kDa, with a polydispersity index (PDI) of 1.29±0.02, and a thermal degradation temperature of 235 °C. The produced P3HB had a Mw of 110±0.00 KDa and a PDI of 1.70±0.08, characterized by melting and thermal degradation temperatures of 175 °C and 293 °C, respectively, within the range of values reported for P3HB. These findings demonstrate V. alginolyticus Mo245 as a promising producer of both biopolymers, suitable for the valorization of glycerol, showcasing a sustainable route to yield two valuable biobased materials, an HA-like polysaccharide and P3HB, with potential for use in several applications.
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