Fig. 10: Schematic drawing of the degradation pathway of d-arabinan by Mi. arabinogalactanolyticum.

The two extracellular endo-acting enzymes (EndoMA1 and EndoMA2) depolymerize mycobacterial lipoarabinomannan and arabinogalactan, and the ABC transporter presumably imports arabinooligosaccharides. The two intracellular exo-acting enzymes (ExoMA1 and ExoMA2) further degrade arabinooligosaccharides into d-arabinose monosaccharides, which are metabolized by an isomerase and a kinase.