Summary of key kinetic constants of enzymatically characterized Rubisco enzymes

Range Table - link
Organism Various
Reference Tabita, F. R. 1999. Microbial ribulose 1,5-bisphosphate carboxylase/oxygenase: a different perspective. Photosynth. Res. 60: 1-28. doi:10.1023/A:1006211417981 link p.14 table 2
Primary Source See refs beneath table
Comments P.16 left column 2nd paragraph: "Likewise, there is no known basis for the high KCO2 of the cyanobacterial enzyme (Table 2). Finally, there is no defined reason why this enzyme does not exhibit ‘fallover’ i.e., the characteristic time-dependent decrease in enzymatic activity exhibited by the plant enzyme and most microbial form I enzymes. Indeed, comparisons of very closely related bacterial enzymes of Type IC clearly show very different enzymatic properties (Table 2), as eluded to earlier." Specificity factor for Rubisco (Ω (Ω=VcKo/VoKc), is the ratio of the catalytic efficiency (Vmax/Km) for the carboxylase (Vc/Kc) and oxygenase (Vo/Ko) reactions)
Entered by Uri M
ID 112904