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. 2017 Sep 8;7:11041. doi: 10.1038/s41598-017-11329-3

Table 2.

Comparative enzymatic constants of Vp16 PDF and chimeras using Fo-Met-Ala-Ser as substrate.

PDF enzyme k cat (s−1) K m (mM) k cat /K m (M−1.s−1) Relative k cat/K m (%)
Vp16 PDF1B 20 ± 1 2.3 ± 0.9 8,478 ± 2276 100
Vp16 PDF(KLF)helices nm nm nm nm
Vp16 PDF(VTI)helices 3.17 1 7,417 ± 6006 92
Vp16 PDF(VTF)helices 0.4 0.5 80 18
E. coli PDF1B 144 3.8 53,846 ± 21,667 100
E. coli PDF(KLF)Δhelices 77 ± 9.4 5.9 ± 2.1 13,125 ± 4,560 66
E. coli PDF(VTI)helices 26 ± 20 1.6 ± 1.3 19,316 ± 9,916 97
E. coli PDF(VTI)Δhelices ND ND ND ND
E. coli PDF(KLI)helices 41 ± 0.4 3.1 ± 0.11 13,189 ± 3,515 67

nm, not measurable.

ND, not determined.