Regulation of CO2 Concentrating Mechanism in Cyanobacteria

Life

Robert L. Burnap¹  Martin Hagemann²  Aaron Kaplan³  John C. Meeks⁴ 

[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] E-Mail:

[4]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

[5] E-Mail:

[6]id="af1-life-05-00348">1Department of Microbiology and Molecular Genetics, Henry Bellmon Research Center, Oklahoma State University, Stillwater, OK 74078, U

关键词: CO₂-concentrating mechanism;    metabolic signals;    non-coding RNA;    transcription factor;    photosynthesis;    RubisCO;   

DOI  :  10.3390/life5010348

来源: mdpi

【 摘 要 】

In this chapter, we mainly focus on the acclimation of cyanobacteria to the changing ambient CO₂ and discuss mechanisms of inorganic carbon (C_i) 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 C_i 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 C_i availability. Finally, emerging evidence for an additional layer of regulatory complexity involving small non-coding RNAs is discussed.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.