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. Author manuscript; available in PMC: 2009 Jan 26.
Published in final edited form as: J Biol Chem. 2007 Jul 20;282(38):27736–27743. doi: 10.1074/jbc.M703788200

TABLE 2.

Comparison of the kinetic parameters, critical concentration (Cc), and GTPase activity of MtbFtsZ and EcFtsZ

Parameters MtbFtsZ
 EcFtsZ-F268Ca
MMK (pH 6.5) HMK (pH 7.7) HMK (pH 7.7)
k1 (s−1) 0.10 0.21 0.38
k2 (μm−1 s−1) 0.50 0.62 0.72
k−2 (s−1) 2347 352.0 199.6
ke (μm−1 s−1) 0.95 0.20 6.63
k−e (s−1) 1.17 (1.9)b 0.41 (1.3)b 4.0 (8.0)b
k−2/k2 (μm) 4694 567.7 277.2
k−e/ke (μm) 1.22 2.05 0.60
Cc (μm) 2.0 3.2 1.2
a

Data are taken from our previous study (1).

b

Calculated from k−e = ke Cc.