Table 2.

Rubisco catalytic parameters used in competition modeling

Rubisco source	kcatC	kcatO	KMCO2	KMO2	KMRuBP	Substrate specificity factor	Carboxylation efficiency	References
	(1/s)	(1/s)	(μM)	(μM)	(μM)	(SC/O)	(kcatC/KMCO2) (1/s/μM)
Tobacco	3.40	1.14	10.7	295	18.0	82	0.318	(67)
Synechococcus	14.4	1.22*	172	585*	69.9	40	0.084	(36, 40)
Cyanobium	9.40	1.42†	169	1,400†	40.0	55	0.056	(15, 41)
Ancestral F1A	4.77	1.42	113	2,010	40.0‡	60	0.042	(15, 41)
Ancestral F1B	4.72	0.50	120	641	69.9‡	50	0.039	(15, 36)
Chlamydomonas	2.91	0.61	33.0	422	19.0§	61	0.088	(42, 43)

^*The k_cat^O and K_MO₂ for Synechococcus Rubisco are from Occhialini, Lin, Andralojc, Hanson, and Parry (40).

^†The k_cat^O of the Cyanobium enzyme was estimated using the Prochlorococcus K_MO₂ (15), and the published values of k_cat^C, K_MCO₂, and S_C/O for Cyanobium (41) using k_cat^O = [(k_cat^C × K_MO₂)/S_C/O]/K_MCO₂.

^‡K_MRuBP values for Ancestral F1A and F1B enzymes are those of Cyanobium and Synechococcus, respectively, from the references highlighted.

^§The K_MRuBP value for Chlamydomonas is from Zhu and Spreitzer (42) while all other values are from Spreitzer, Peddi, and Satagopan (43).