The molecular response of Aspergillus niger to guar gum

Guar gum consists mainly of galactomannan, and constitutes the endosperm of guar seeds that acts as a reserve polysaccharide for germination. Due to its molecular structure and physical properties, this biopolymer has been considered as one of the most important and widely used gums in industry. However, for many of these applications this (hemi-)cellulosic structure needs to be modified or (partially) depolymerized in order to customize and improve its physicochemical properties. In this study, transcriptome was employed to decipher the complete enzymatic arsenal for guar gum depolymerization by Aspergillus niger. In this study, we aimed to gain a comprehensive insight into the transcriptome of A. niger during guar gum degradation (after 8, 24 and 48 hours of incubation) and compare this to the transcriptome on the main guar gum components D-mannose, D-galactose and mannan, as well as D-glucose and guar gum that was used as a control after 2 hour incubation.