Application | Comment | Organism |
---|---|---|
analysis | method for anchoring native acarbose to gold chip surfaces for surface plasmon resonance studies employing glucoamylase as analyte. The key method is the chemoselective and protecting group-free oxime functionalization of the pseudo-tetrasaccharide-based inhibitor acarbose. At pH 7.0 the association and dissociation rate constants for the acarbose-glucoamylase interaction are 10000 per M and s and 103 per s, respectively, and the conformational change to a tight enzyme-inhibitor complex affects the dissociation rate constant by a factor of 100 per s. The acarbose-presenting surface plason resonance surfaces can be used as a glucoamylase sensor that allows rapid, label-free affinity screening of small carbohydrate-based inhibitors in solution | Aspergillus niger |
Protein Variants | Comment | Organism |
---|---|---|
E180Q | active site mutant. For inhibitor acarbose, a rapid binding event is apparently intersected by a slower secondary binding event. Mutant shows a dramatically higher Kd value for acarbose | Aspergillus niger |
R54L | active site mutant. For inhibitor acarbose, a rapid binding event is apparently intersected by a slower secondary binding event. Mutant shows a dramatically higher Kd value for acarbose | Aspergillus niger |
Y175F | mutation in subsite +3. Mutant displays only minor differences to wild-type in affinities to inhibitors acarbose and an acarbose conjugate | Aspergillus niger |
Inhibitors | Comment | Organism | Structure |
---|---|---|---|
1-deoxynojirimycin | - |
Aspergillus niger | |
acarbose | - |
Aspergillus niger |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Aspergillus niger | - |
- |
- |
Source Tissue | Comment | Organism | Textmining |
---|---|---|---|
commercial preparation | - |
Aspergillus niger | - |