Bacterial beta-glucosidases TmGH1 and TxGH116 (TmGH1 and TxGH116)

Bacterial beta-glucosidases TmGH1 (from Thermotoga maritima) and TxGH116 (from Thermoanaerobacterium xylanolyticum) are highly stable enzymes belonging to the glycoside hydrolase families 1 and 116, respectively. In nature, these enzymes facilitate the breakdown of complex polysaccharides into glucose, playing a critical role in bacterial energy metabolism and biomass degradation. In a biomedical context, they serve as essential structural and functional surrogates for human enzymes; TmGH1 is a model for the lysosomal acid beta-glucosidase (GBA1), while TxGH116 is a model for the non-lysosomal beta-glucosidase (GBA2). These bacterial homologs are frequently utilized in drug discovery to screen for pharmacological chaperones and inhibitors aimed at treating Gaucher disease and associated neurodegenerative disorders like Parkinson's disease. Their robust stability and ease of crystallization allow researchers to map the binding modes of small molecules, providing insights into the catalytic mechanisms and inhibitory pathways relevant to human health.

Other names

Thermotoga maritima beta-glucosidase (TmGH1)Thermoanaerobacterium xylanolyticum beta-glucosidase (TxGH116)Glycoside hydrolase family 1 beta-glucosidaseGlycoside hydrolase family 116 beta-glucosidaseBacterial GBA1 and GBA2 homologs

These enzymes are targeted by competitive inhibitors and mechanism-based covalent inactivators that mimic the transition state of glucoside hydrolysis, thereby blocking the active site and preventing substrate processing.