Parry, Martin A J and Schmidt, C. N Godfrey and Keys, Alfred J. and Gutteridge, Steven (1983) Activation of ribulose 1,5-bisphosphate carboxylase by Ca2+. FEBS Letters, 159 (1-2). pp. 107-111. ISSN 0014-5793
Full text not available from this repository.Abstract
Purified RuBP carboxylase requires activation by reaction with CO2 and a divalent metal ion. Mg2+ is the most effective metal ion, and is probably involved in activation in vivo. Ca2+ is reported not to be an activator. Several oxyanions, including phosphate esters, are effectors of activation of RuBP carboxylase by Co2 and Mg2+. It is now shown that Ca2+ is an effective activator of RuBP carboxylase and that PO4 3-, FBP, NADPH and 6-phosphogluconate are effectors of this activation. The ratio of oxygenase to carboxylase activity of enzyme activated with Ca2+ is similar to that for the enzyme activated with Mg2+.