Bacterial Carbohydrate-Binding Modules and Glycoside Hydrolases (CBMs and GHs)

Bacterial Carbohydrate-Binding Modules (CBMs) and Glycoside Hydrolases (GHs) are essential components of the carbohydrate-active enzyme (CAZyme) apparatus used by bacteria to process complex sugars. Glycoside Hydrolases are enzymes responsible for the hydrolysis of glycosidic bonds, while CBMs are non-catalytic protein domains that increase catalytic efficiency by anchoring the enzyme to its carbohydrate substrate (Boraston et al., 2004). These proteins play a pivotal role in bacterial physiology, including nutrient acquisition, cell wall synthesis, and the formation of biofilms that protect bacteria from environmental stress and host immune responses (Davies & Henrissat, 1995). In clinical contexts, these molecules are significant targets for treating infections caused by pathogens such as Streptococcus pneumoniae and Pseudomonas aeruginosa, which utilize GHs to degrade host mucus and tissues (Koropatkin et al., 2012). Therapeutic interventions include the use of small-molecule inhibitors, such as iminosugars, which mimic the transition state of carbohydrate hydrolysis to block enzyme activity. Additionally, recombinant GHs are being explored as biofilm-dispersing agents that can break down the protective polysaccharide matrix of chronic infections, thereby enhancing the penetration and efficacy of standard antibiotics (Lombard et al., 2014).

Other names

Carbohydrate-Active EnzymesCAZymesGlycosidasesPolysaccharide-degrading enzymesBacterial glycosidases

Competitive inhibition of the catalytic active site of glycoside hydrolases or disruption of substrate binding via CBM interference.