Table 1. Tm-values determined based on the heat-induced changes in the PD proteins’ secondary structures and the heat-induced release of their flavin cofactors.
Protein/Mixture | Tm based onsecondary structurechangesa(CD at 222 nm) |
Tm based onflavin releaseb(CD at 320 nm) | ||
---|---|---|---|---|
Tm1 | Tm2 | Tm3 | Tm | |
HsCoaC | 65.6 | 75.5 | – | 70.2 |
Hal3PD | 45.0 | 60.1 | 67.6 | 41.2 |
Vhs3PD | 63.2 | 78.4 | – | 78.1 |
Hal3PD/Cab3PD | 55.8 | – | – | 47.1 |
Vhs3PD/Cab3PD | 56.8 | 73.5 | – | ndc |
Hal3PD/Vhs3PD/Cab3PD | 57.7 | 68.5 | – | 53.8 |
aDetermined from the maxima observed in the first derivative plots (Fig. 6b) of the heat-induced melt curves shown in Fig. 6a. The value in bold indicates the value that is most likely physiologically relevant (see text for details).
bDetermined by fitting the data shown in the plots in Fig. 6c to the Gibbs-Helmholtz equation (see Experimental for details).
cnd, not determined.