TonB-dependent transporter and hexosaminidase (Cellvibrio japonicus) (TBDT-Hex (C. japonicus))

Cellvibrio japonicus is a Gram-negative soil bacterium that serves as a model organism for the degradation of complex polysaccharides (De Castro et al., 2016, Journal of Industrial Microbiology & Biotechnology). The TonB-dependent transporters (TBDTs) in this species are specialized outer membrane proteins that utilize the TonB-ExbB-ExbD complex to drive the active transport of large nutrient molecules, particularly plant-derived oligosaccharides, into the periplasmic space (Larsbrink et al., 2011, Molecular Microbiology). Hexosaminidases, such as beta-N-acetylglucosaminidases, are enzymes located within the periplasm or secreted that catalyze the hydrolysis of terminal N-acetyl-D-hexosamine residues from these imported glycans (Gardner et al., 2014, Journal of Biological Chemistry). Together, these proteins form part of Polysaccharide Utilization Loci (PULs) that allow the bacterium to efficiently utilize chitin and other biomass components. While TBDTs in pathogenic bacteria are investigated as potential targets for siderophore-drug conjugates, the proteins in C. japonicus are primarily of interest for industrial biotechnology and bioremediation rather than human medicine (Noinaj et al., 2010, Annual Review of Microbiology). Consequently, there are no known therapeutic drugs or clinical applications associated with these specific C. japonicus proteins.

Other names

TBDTBeta-N-acetylhexosaminidaseN-acetylglucosaminidaseCjTBDTPolysaccharide utilization loci proteins

Not applicable as there are no known therapeutic drugs targeting these proteins in the non-pathogenic bacterium Cellvibrio japonicus.