Rubisco and inorganic carbon assimilation - Biologie du chloroplaste et perception de la lumière chez les micro-algues Accéder directement au contenu
Chapitre D'ouvrage Année : 2023

Rubisco and inorganic carbon assimilation

Résumé

Ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) is the entry point of CO 2 into the Calvin-Benson Cycle (CBC), connecting the inorganic carbon and organic carbon realms making it arguably one of the most important enzymes on Earth. Chlamydomonas has proven to be a powerful model for understanding Rubisco biogenesis, function, regulation and engineering with this chapter highlighting the core findings in the field of Chlamydomonas Rubisco biology over the last several decades. In addition to performing carboxylation, Rubisco also performs an energy wasteful oxygenation reaction that results in photorespiration. To minimize photorespiration Chlamydomonas operates a highly effective CO 2 concentrating mechanism (CCM) that increases the CO 2 : O 2 ratio at the active site of Rubisco reducing oxygenation of the ribulose-1,5-bisphosphate substrate. The CCM involves an interplay between carbonic anhydrases, inorganic carbon transporters and structural components to move inorganic carbon against its concentration gradient from the external environment to a specialized sub-chloroplast structure called the pyrenoid. Rapid advances in understanding CCM function highlighted in this chapter, including recent discoveries concerning the importance of Rubisco structure for its condensation into the pyrenoid, has merged the Rubisco and CCM fields and laid the groundwork for what is expected to be an exciting decade for Rubisco and CCM research.
Fichier principal
Vignette du fichier
Chapter 7_Wostrikoff_Mackinder.pdf (3.45 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04003943 , version 1 (24-02-2023)

Identifiants

  • HAL Id : hal-04003943 , version 1

Citer

Katia Wostrikoff, Luke C M Mackinder. Rubisco and inorganic carbon assimilation. Arthur Grossman; Francis-André Wollman. The Chlamydomonas Sourcebook, 3rd edition., Volume 2 Organellar and Metabolics Processes, Elsevier; Academic Press, In press, 978-0-12-821430-5. ⟨hal-04003943⟩
8 Consultations
69 Téléchargements

Partager

Gmail Facebook X LinkedIn More