Chromogenic Carbamate and Acetal Substrates for Glycosaminidases
摘要:
The enzyme Dispersin B is a medicinally relevant beta-hexosaminidase with potential for use in the treatment of biofilm-related infections. Here we describe the synthesis and evaluation of a p-nitrophenyl glycosyl carbamate and a p-nitrophenyl glycosyl acetal as improved substrates of Dispersin B. The p-nitrophenyl glycosyl carbamate shows substantially improved analytical signal in continuous assays and superior kinetics (k(cat)/K-m 6.1 mM(-1) s(-1)) when compared to the benchmark substrate 4-nitrophenyl N-acetyl-beta-D-glucosaminide (k(cat)/K-m 0.021 mM(-1) s(-1)) in measuring Dispersin B activity. The improvements observed are compared to the activity of jack bean beta-hexosaminidase toward these substrates.
Chromogenic Carbamate and Acetal Substrates for Glycosaminidases
摘要:
The enzyme Dispersin B is a medicinally relevant beta-hexosaminidase with potential for use in the treatment of biofilm-related infections. Here we describe the synthesis and evaluation of a p-nitrophenyl glycosyl carbamate and a p-nitrophenyl glycosyl acetal as improved substrates of Dispersin B. The p-nitrophenyl glycosyl carbamate shows substantially improved analytical signal in continuous assays and superior kinetics (k(cat)/K-m 6.1 mM(-1) s(-1)) when compared to the benchmark substrate 4-nitrophenyl N-acetyl-beta-D-glucosaminide (k(cat)/K-m 0.021 mM(-1) s(-1)) in measuring Dispersin B activity. The improvements observed are compared to the activity of jack bean beta-hexosaminidase toward these substrates.
The enzyme Dispersin B is a medicinally relevant beta-hexosaminidase with potential for use in the treatment of biofilm-related infections. Here we describe the synthesis and evaluation of a p-nitrophenyl glycosyl carbamate and a p-nitrophenyl glycosyl acetal as improved substrates of Dispersin B. The p-nitrophenyl glycosyl carbamate shows substantially improved analytical signal in continuous assays and superior kinetics (k(cat)/K-m 6.1 mM(-1) s(-1)) when compared to the benchmark substrate 4-nitrophenyl N-acetyl-beta-D-glucosaminide (k(cat)/K-m 0.021 mM(-1) s(-1)) in measuring Dispersin B activity. The improvements observed are compared to the activity of jack bean beta-hexosaminidase toward these substrates.