SAR comparisons between the two homologous esterases based on branching and heteroatom positioning.
Black, carbon; red, oxygen; yellow, sulfur. A and B, comparison of substrate classes with varying α-position branching. Overall, Rv0045c catalytic effectiveness increases with increased branching, whereas ybfF does not change. C and D, comparison of various substrate classes changing heteroatom from β-position to the γ-position. Overall, catalytic effectiveness is higher in ybfF with the heteroatom in the γ-position than for Rv0045c. Error bars, S.D.