Abstract
Background The plastics derived from petrochemicals have many applications. However, public concern and environmental laws led to conservation policies and establish programs that stimulate the research and use of new products based on renewable resources. Polyhydroxyalkanoates (PHAs) are biopolymers synthesized by microorganisms under conditions of nutrient stress with similar properties to conventional plastics and are completely biodegradable. One of the PHAs is polyhydroxybutyrate (PHB), which accumulated in several bacteria [1]. Gluconacetobacter diazotrophicus is a plant-growth-promoting bacterium, which interacts and lives within sugarcane plants [2]. Genome annotation of this bacterium offers a new scenario to better understand plant-bacteria interactions and reveals novel potential bioproducts. Sugarcane is cultivated mostly for sugar and fuel ethanol production. In this work, we propose the production of biodegradable plastics from sugarcane coupled to its natural partner growth promoter bacterium, G. diazotrophicus.
Highlights
The plastics derived from petrochemicals have many applications
A multiple alignment analysis was performed using CLUSTALW and the phylogenetic trees were generated using MEGA based on the maximum likelihood (ML) method and the topology of the trees was evaluated by bootstrap analysis on the basis of 1,000 replications
Analysis of the G. diazotrophicus genome sequence for putative PHB polymerase gene resulted in the identification of a protein with a poly(R)-hydroxyalkanoic acid (PHA) synthase domain, class III, that represents the PhaC subunit of a heterodimeric form of the polyhydroxyalkanoic acid synthase, which links D-(-)-3-hydroxybutyrlCoA to an existing PHA molecule by the formation of an ester bond
Summary
Public concern and environmental laws led to conservation policies and establish programs that stimulate the research and use of new products based on renewable resources. Polyhydroxyalkanoates (PHAs) are biopolymers synthesized by microorganisms under conditions of nutrient stress with similar properties to conventional plastics and are completely biodegradable. One of the PHAs is polyhydroxybutyrate (PHB), which accumulated in several bacteria [1]. Gluconacetobacter diazotrophicus is a plant-growth-promoting bacterium, which interacts and lives within sugarcane plants [2]. Genome annotation of this bacterium offers a new scenario to better understand plant-bacteria interactions and reveals novel potential bioproducts. We propose the production of biodegradable plastics from sugarcane coupled to its natural partner growth promoter bacterium, G. diazotrophicus
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