The functioning of the CO2 concentrating mechanism in several cyanobacterial strains: a review of general physiological characteristics, genes, proteins, and recent advances

  title={The functioning of the CO2 concentrating mechanism in several cyanobacterial strains: a review of general physiological characteristics, genes, proteins, and recent advances},
  author={G. Price and D. S{\"u}ltemeyer and B. Klughammer and M. Ludwig and M. Badger},
Cyanobacteria (blue-green algae) possess an environmental adaptation for survival at low CO2 concentrations. The adaptation is known as a CO2 concentrating mechanism (CCM), and it functions to actively transport and accumulate inorganic carbon ( and CO2; Ci) within the cell and then uses this Ci pool to provide elevated CO2 concentrations around the primary CO2-fixing enzyme, ribulose bisphosphate carboxylase-oxygenase (Rubisco). It appears that the site of CO2 elevation is within a unique… Expand
Advances in understanding the cyanobacterial CO2-concentrating-mechanism (CCM): functional components, Ci transporters, diversity, genetic regulation and prospects for engineering into plants.
Through database analysis of some 33 complete genomic DNA sequences for cyanobacteria, it is evident that considerable diversity exists in the composition of transporters employed, although in many species this diversity is yet to be confirmed by comparative phenomics. Expand
Modes of active inorganic carbon uptake in the cyanobacterium, Synechococcus sp. PCC7942.
A speculative model is forward that proposes that two unique proteins, ChpX and ChpY, possess CO2 hydration activity in the light, and when coupled to photosynthetic electron transport through the two specialised NDH-1 complexes, result in net hydration of CO2 to HCO3- as a crucial component of the CO2 uptake process. Expand
CO 2 concentrating mechanisms in cyanobacteria : molecular components , their diversity and evolution
Cyanobacteria have evolved an extremely effective single-cell CO2 concentrating mechanism (CCM). Recent molecular, biochemical and physiological studies have signi®cantly extended current knowledgeExpand
CO2 concentrating mechanisms in cyanobacteria: molecular components, their diversity and evolution.
There are multiple carbonic anhydrases in many cyanobacteria, but, surprisingly, several cyanobacterial genomes appear to lack any identifiable CA genes. Expand
CO2-concentrating mechanism in cyanobacterial photosynthesis: organization, physiological role, and evolutionary origin
The primary processes of uptake, translocation, and accumulation of inorganic carbon near the active site of carbon assimilation by the enzyme ribulose-1,5-bisphosphate carboxylase in the C3 cycle in cyanobacteria are described as one of the specialized forms of CO2 concentration which occurs in some photoautotrophic cells. Expand
Inorganic carbon transporters of the cyanobacterial CO2 concentrating mechanism
  • G. Price
  • Biology, Medicine
  • Photosynthesis Research
  • 2010
The in-membrane topology structures of the BicA and SbtA HCO3− transporters are now known and this may aid in determining processes related to transporter activation during dark to light transitions or under severe Ci limitation. Expand
Regulatory components of carbon concentrating mechanisms in aquatic unicellular photosynthetic organisms
Information is provided on the localization of the CCM components as well as their function and participation in the development of an efficient CCM to provide a clear understanding of the mechanism under study. Expand
CO2 Acquisition, Concentration and Fixation in Cyanobacteria and Algae
This chapter examines aspects of co-evolution of Rubisco and CO2-concentrating mechanisms in both algae and cyanobacteria, and possible diversity of CCM operation among the green and non-green algae, highlighting possible variation in CCM operations compared to the models developed for green microalgae. Expand
Functions, Compositions, and Evolution of the Two Types of Carboxysomes: Polyhedral Microcompartments That Facilitate CO2 Fixation in Cyanobacteria and Some Proteobacteria
This review presents this review to summarize the knowledge of the structure and function of both types of carboxysome, and casts light on differing evolutionary trajectories which may have led to the differences observed in extant car boxysomes. Expand
Carbon-Concentrating Mechanism of Cyanobacteria
The Gram-negative photosynthetic prokaryotes, cyanobacteria, are thought to be appeared on earth approximately 2,600–3,500 million years ago. Due to their carbon-concentrating mechanism (CCM) system,Expand