CC-4882 rbcL-I309M mt+
$30.00
From Robert J. Spreitzer, University of Nebraska, August 2014
Using standard methods of directed mutagenesis and chloroplast transformation of rbcL∆-MX3312 mt+ (CC-4696) (Satagopan and Spreitzer 2004), an I309M substitution was created in the Rubisco large subunit (Lim and Meyer, unpublished). This mutant was created to investigate phylogenetic differences in the Rubisco large subunit that may be responsible for pyrenoid formation in algae (Nozaki et al. 2002). See also rbcL-R32K/A222S/C247S and rbcL-R32K/V145C/P210S/A222S/I225L/C247S/I309M. An I309M substitution in plant Rubisco alters carboxylation catalytic efficiency (Whitney et al. 2011). This strain has been maintained with acetate medium in darkness to prevent selection for secondary mutations that may improve Rubisco function.
Nozaki H, Onishi K, Morita E (2002) Differences in pyrenoid morphology are correlated with differences in the rbcL genes of members of the Chloromonas lineage (volvocales, chlorophyceae). J Mol Evol 55:414-430
Satagopan S, Spreitzer RJ (2004) Substitutions at the Asp-473 latch residue of Chlamydomonas ribulosebisphosphate carboxylase/oxygenase cause decreases in carboxylation efficiency and CO2/O2 specificity. J Biol Chem 279:14240-14244
Whitney S, Sharwood RE, Orr D, White SJ, Alonso H, Galmes J (2011) Isoleucine 309 acts as a C4 catalytic switch that increases ribulose-1,5-bisphosphate carboxylase/oxygenase (rubisco) carboxylation rate in Flaveria. Proc Natl Acad Sci USA 108:14688–14693