EC Number |
Metals/Ions |
Reference |
---|
1.3.1.98 | Cs+ |
- |
286068 |
1.3.1.98 | Cs+ |
at saturating cation concentration maximal enzyme activity: 2 units/mg |
286065 |
1.3.1.98 | K+ |
- |
286059 |
1.3.1.98 | K+ |
at saturating cation concentration maximal enzyme activity: 50 units/mg |
286065 |
1.3.1.98 | K+ |
effect on pH optimum and Km |
286064 |
1.3.1.98 | K+ |
good activator |
286060 |
1.3.1.98 | K+ |
K+ activates at 3 mM |
722831 |
1.3.1.98 | K+ |
K+ causes greatest activation |
286068 |
1.3.1.98 | K+ |
one K+ binding site per catalytic center |
286064 |
1.3.1.98 | K+ |
PaMurB crystal structure contains a potassium ion in the active site. The potassium ion displays a pentagonal bipyramidal coordination geometry with two main chain oxygen atoms (Ala237, Ser239), one side chain carboxyl oxygen atom from Glu-335, one side chain oxygen atom of Asn-57 and the O7n oxygen atom of the nicotinamide ring as ligands. The potassium ion activates MurB by facilitating substrate orientation and binding |
746242 |