PirXI variants | Metal | Kact (ĀµM)c | Kinetic parametersa | ||
---|---|---|---|---|---|
kcat (sā1) | KM (mM) | kcat/KM (sā1 Mā1) | |||
WT | Mg2+ | 130āĀ±ā7 | 2.2āĀ±ā0.1 | 7.1āĀ±ā0.5 | 310 |
Mn2+ | 0.44āĀ±ā0.05 | 6.9āĀ±ā0.2 | 6.2āĀ±ā0.7 | 1110 | |
Ca2+ | 230āĀ±ā20 | 0.8āĀ±ā0.1 | 1360āĀ±ā160 | 0.4b | |
V270AāA273G | Mg2+ | 160āĀ±ā14 | 1.8āĀ±ā0.1 | 11.6āĀ±ā1.6 | 155 |
Mn2+ | 0.39āĀ±ā0.05 | 2.8āĀ±ā0.1 | 9āĀ±ā1 | 310 | |
Ca2+ | 140āĀ±ā12 | 0.28āĀ±ā0.01 | 1760āĀ±ā120 | 0.18b | |
S141NāT142SāA143SāG174A | Mg2+ | 126āĀ±ā10 | 1.6āĀ±ā0.2 | 27āĀ±ā9 | 60 |
Mn2+ | 2.4āĀ±ā0.5 | 4.9āĀ±ā1 | 37āĀ±ā1.5 | 132 | |
Ca2+ | 96.5āĀ±ā3.5 | 0.06āĀ±ā0.01 | 1200āĀ±ā300 | 0.03b | |
E15DāT142S | Mg2+ | 190āĀ±ā10 | 1.9āĀ±ā0.1 | 22āĀ±ā2 | 86 |
Mn2+ | 2.1āĀ±ā0.3 | 5āĀ±ā0.2 | 53āĀ±ā4 | 94 | |
Ca2+ | 50āĀ±ā10 | >ā0.02 | N.A. | 0.018b | |
N338C | Mg2+ | 112āĀ±ā7 | 4.2āĀ±ā0.2 | 22āĀ±ā2 | 191 |
Mn2+ | 1.3āĀ±ā0.3 | 7.2āĀ±ā0.2 | 29āĀ±ā1.5 | 248 | |
Ca2+ | 163āĀ±ā6.5 | 0.78āĀ±ā0.2 | 2800āĀ±ā800 | 0.2b |