Logo du site
  • English
  • Français
  • Se connecter
Logo du site
  • English
  • Français
  • Se connecter
  1. Accueil
  2. Université de Neuchâtel
  3. Publications
  4. STAY-GREEN and Chlorophyll Catabolic Enzymes Interact at Light-Harvesting Complex II for Chlorophyll Detoxification during Leaf Senescence in <i>Arabidopsis</i>
 
  • Details
Options
Vignette d'image

STAY-GREEN and Chlorophyll Catabolic Enzymes Interact at Light-Harvesting Complex II for Chlorophyll Detoxification during Leaf Senescence in <i>Arabidopsis</i>

Auteur(s)
Sakuraba, Yasuhito
Editeur(s)
Schelbert, Silvia
Park, So-Yon
Han, Su-Hyun
Lee, Byoung-Doo
Besagni Andrès, Céline
Kessler, Félix 
Institut de biologie 
Hörtensteiner, Stefan
Paek, Nam-Chon
In
The Plant Cell, American Society of Plant Biologists, 2012/24/2/507-518
Résumé
During leaf senescence, plants degrade chlorophyll to colorless linear tetrapyrroles that are stored in the vacuole of senescing cells. The early steps of chlorophyll breakdown occur in plastids. To date, five chlorophyll catabolic enzymes (CCEs), NONYELLOW COLORING1 (NYC1), NYC1-LIKE, pheophytinase, pheophorbide a oxygenase (PAO), and red chlorophyll catabolite reductase, have been identified; these enzymes catalyze the stepwise degradation of chlorophyll to a fluorescent intermediate, <i>p</i>FCC, which is then exported from the plastid. In addition, <i>STAY-GREEN (SGR)</i>, Mendel’s green cotyledon gene encoding a chloroplast protein, is required for the initiation of chlorophyll breakdown in plastids. Senescence- induced SGR binds to light-harvesting complex II (LHCII), but its exact role remains elusive. Here, we show that all five CCEs also specifically interact with LHCII. In addition, SGR and CCEs interact directly or indirectly with each other at LHCII, and SGR is essential for recruiting CCEs in senescing chloroplasts. PAO, which had been attributed to the inner envelope, is found to localize in the thylakoid membrane. These data indicate a predominant role for the SGR-CCE-LHCII protein interaction in the breakdown of LHCII-located chlorophyll, likely to allow metabolic channeling of phototoxic chlorophyll breakdown intermediates upstream of nontoxic <i>p</i>FCC.
URI
https://libra.unine.ch/handle/123456789/5117
DOI
10.1105/tpc.111.089474
Autre version
http://dx.doi.org/10.1105/tpc.111.089474
Type de publication
Resource Types::text::journal::journal article
Dossier(s) à télécharger
 main article: Sakuraba_Y.-Stay_Green-20170223104926-QN.pdf (3.3 MB)
google-scholar
Présentation du portailGuide d'utilisationStratégie Open AccessDirective Open Access La recherche à l'UniNE Open Access ORCID

Adresse:
UniNE, Service information scientifique & bibliothèques
Rue Emile-Argand 11
2000 Neuchâtel

Construit avec Logiciel DSpace-CRIS Maintenu et optimiser par 4Sciences

  • Paramètres des témoins de connexion
  • Politique de protection de la vie privée
  • Licence de l'utilisateur final