Biomedical Engineering Reference
In-Depth Information
OH
OH
O
O
inorganic
phosphate
HO
+
HO
HO
OH
OH
O
OH
sucrose
sucrose
phosphorylase
OH
HO
O
O
HO
HO
+
HO
HO
O
OH
OH
OPO
OH
O
Glc-1-P
fructose
Figure 3.3
Catalysis of sucrose phosphorylase.
Maltose
phosphorylase
reversibly
phosphorolyzes
maltose
into
-Glc-1-P) and glucose (Fig. 3.4) [13].
This enzyme has been found in bacterial cells and is considered
to be involved in the metabolism of extracellular maltose. Because
maltose phosphorylase recognizes the
β
-glucose 1-phosphate (
β
α
-anomeric hydroxy group at
the reducing end of maltose, it phosphorolyzes only the disaccharide
unit.
OH
O
HO
OH
HO
O
inorganic
phosphate
OH
+
O
HO
OH
OH
maltose
maltose
phosphorylase
OH
OH
O
O
O
HO
OPO
+
HO
HO
HO
O
OH
OH
OH
glucose
β
-Glc-1-P
Figure 3.4
Catalysis of maltose phosphorylase.
