Acidovorax delafieldii

Brandi et al. [71] using culture fluid of Acidovorax delafieldii and cyclic 3HB oligomers were in agreement with the presence of endo-hydrolase activity of poly(3HB) depolymerases. Similar results were obtained by de Koning et al. [72] who demonstrated that covalently cross-linked poly(HAMCL) was hydrolyzed completely by P. fluorescens. It is assumed that most - if not all - extracellular poly(HA) depolymerases have endo- and exo-hydrolase activity. Depending on the depolymerase the hydrolysis products are only monomers, monomers and dimers, or a mixture of oligomers (mono- to trimers). 

Varions microorganisms able to degrade PBS and its copolymers have been isolated, inclnding bacteria and fungi, such as Bacillus stearothermophilus (Tomita et al. 2000), Microbispora rosea, Excellospora japonica and Excellospora viridilutea (Jarerat and Tokiwa 2001), Penicillium chrysogenum (Zhu et al. 2003), Bacillus pumilus and Acidovorax delafieldii (Hayase et al. 2004), and Aspergillus versicolor (Zhao et al. 2005). 

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