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. 2014 Jul 21;53(31):5150–5161. doi: 10.1021/bi5007404

Table 3. P5CDH Kinetic and NAD+ Binding Parameters.

BjPutA kcat (s–1)a Km (mM)a kcat/Km (M–1 s–1) Kd (μM, NAD+)b
wild-type 3.4 ± 0.1 0.42 ± 0.04 8095 ± 822 0.60 ± 0.04
T348Y 4.2 ± 0.2 0.42 ± 0.04 10000 ± 1017 0.75 ± 0.06
S607Y 4.5 ± 0.2 0.48 ± 0.03 9375 ± 664 1.00 ± 0.04
D778Y 3.8 ± 0.1 0.38 ± 0.02 10000 ± 567 0.67 ± 0.04
D779A 5.0 ± 0.1 0.38 ± 0.03 13157 ± 1102 0.64 ± 0.05
D779Y 0.02 ± 0.01 0.20 ± 0.03 100 ± 16 0.65 ± 0.04
D779W 0.003 ± 0.001 0.35 ± 0.15 8.6 ± 4 0.78 ± 0.05
a

Mixture of 0.01–6 mM L-P5C, 0.2 mM NAD+, 0.25 μM enzyme, and 50 mM potassium phosphate (pH 7.5, 600 mM NaCl).

b

From fluorescence quenching with 0.1–25 μM NAD+, 0.25 μM enzyme, and 50 mM potassium phosphate (pH 7.5).