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Life 2015, 5(1), 348-371; doi:10.3390/life5010348

Regulation of CO2 Concentrating Mechanism in Cyanobacteria

1
Department of Microbiology and Molecular Genetics, Henry Bellmon Research Center, Oklahoma State University, Stillwater, OK 74078, USA
2
Institute Biosciences, Department Plant Physiology, University of Rostock, Albert-Einstein-Straße 3, Rostock D-18059, Germany
3
Department of Plant and Environmental Sciences, The Alexander Silberman Institute of Life Sciences, Edmond J. Safra Campus, Givat Ram, Hebrew University of Jerusalem, Jerusalem 91904, Israel
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editors: John C. Meeks and Robert Haselkorn
Received: 19 December 2014 / Revised: 15 January 2015 / Accepted: 21 January 2015 / Published: 28 January 2015
(This article belongs to the Special Issue Cyanobacteria: Ecology, Physiology and Genetics)
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Abstract

In this chapter, we mainly focus on the acclimation of cyanobacteria to the changing ambient CO2 and discuss mechanisms of inorganic carbon (Ci) uptake, photorespiration, and the regulation among the metabolic fluxes involved in photoautotrophic, photomixotrophic and heterotrophic growth. The structural components for several of the transport and uptake mechanisms are described and the progress towards elucidating their regulation is discussed in the context of studies, which have documented metabolomic changes in response to changes in Ci availability. Genes for several of the transport and uptake mechanisms are regulated by transcriptional regulators that are in the LysR-transcriptional regulator family and are known to act in concert with small molecule effectors, which appear to be well-known metabolites. Signals that trigger changes in gene expression and enzyme activity correspond to specific “regulatory metabolites” whose concentrations depend on the ambient Ci availability. Finally, emerging evidence for an additional layer of regulatory complexity involving small non-coding RNAs is discussed. View Full-Text
Keywords: CO2-concentrating mechanism; metabolic signals; non-coding RNA; transcription factor; photosynthesis; RubisCO CO2-concentrating mechanism; metabolic signals; non-coding RNA; transcription factor; photosynthesis; RubisCO
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Burnap, R.L.; Hagemann, M.; Kaplan, A. Regulation of CO2 Concentrating Mechanism in Cyanobacteria. Life 2015, 5, 348-371.

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