Rubisco and carbon‐concentrating mechanism co‐evolution across chlorophyte and streptophyte green algae
Open Access
- 6 April 2020
- journal article
- research article
- Published by Wiley in New Phytologist
- Vol. 227 (3), 810-823
- https://doi.org/10.1111/nph.16577
Abstract
Green algae expressing a carbon concentrating mechanism (CCM) are usually associated with a Rubisco‐containing micro‐compartment, the pyrenoid. A link between the small subunit (SSU) of Rubisco and pyrenoid formation in Chlamydomonas reinhardtii has previously suggested that specific RbcS residues could explain pyrenoid occurrence in green algae. A phylogeny of RbcS was used to compare the protein sequence and CCM distribution across the green algae and positive selection in RbcS was estimated. For six streptophyte algae, Rubisco catalytic properties, affinity for CO2 uptake (K0.5), carbon isotope discrimination (δ13C) and pyrenoid morphology were compared. The length of the βA‐βB loop in RbcS provided a phylogenetic marker discriminating chlorophyte from streptophyte green algae. Rubisco kinetic properties in streptophyte algae have responded to the extent of inducible CCM activity, as indicated by changes in inorganic carbon uptake affinity, δ13C and pyrenoid ultrastructure between high and low CO2 conditions for growth. We conclude that the Rubisco catalytic properties found in streptophyte algae have co‐evolved and reflect the strength of any CCM or degree of pyrenoid leakiness, and limitations to inorganic carbon in the aquatic habitat, whereas Rubisco in extant land plants reflects more recent selective pressures associated with improved diffusive supply the terrestrial environment.Keywords
Funding Information
- Natural Environment Research Council (NE/L002507/1)
- Biotechnology and Biological Sciences Research Council (BB/I024488/1, BB/I024518/1, BB/M007693/1)
This publication has 105 references indexed in Scilit:
- Rubisco small-subunit α-helices control pyrenoid formation inChlamydomonasProceedings of the National Academy of Sciences of the United States of America, 2012
- The C4 plant lineages of planet EarthJournal of Experimental Botany, 2011
- Cross-species analysis traces adaptation of Rubisco toward optimality in a low-dimensional landscapeProceedings of the National Academy of Sciences of the United States of America, 2010
- Highly Conserved Small Subunit Residues Influence Rubisco Large Subunit CatalysisOnline Journal of Public Health Informatics, 2009
- Maximum leaf conductance driven by CO 2 effects on stomatal size and density over geologic timeProceedings of the National Academy of Sciences of the United States of America, 2009
- An Improved General Amino Acid Replacement MatrixMolecular Biology and Evolution, 2008
- PAML 4: Phylogenetic Analysis by Maximum LikelihoodMolecular Biology and Evolution, 2007
- Despite slow catalysis and confused substrate specificity, all ribulose bisphosphate carboxylases may be nearly perfectly optimizedProceedings of the National Academy of Sciences of the United States of America, 2006
- ProtTest: selection of best-fit models of protein evolutionBioinformatics, 2005
- Molecular Phylogeny and Taxonomic Revision of Chlamydomonas (Chlorophyta). I. Emendation of Chlamydomonas Ehrenberg and Chloromonas Gobi, and Description of Oogamochlamys gen. nov. and Lobochlamys gen. nov.Protist, 2001