Fine tuning of the photosystem II major antenna mobility within the thylakoid membrane of higher plants.

Computer Simulation Hydrogen-Ion Concentration Light Light-Harvesting Protein Complexes / chemistry Models, Molecular Photosystem II Protein Complex / metabolism Structure-Activity Relationship Thylakoids / metabolism
Light harvesting complex Photoprotection Protein diffusion PsbS Saffman–Delbrück model Thylakoid lipids

Journal

Biochimica et biophysica acta. Biomembranes
ISSN: 1879-2642
Titre abrégé: Biochim Biophys Acta Biomembr
Pays: Netherlands
ID NLM: 101731713

Informations de publication

Date de publication:
01 12 2019
Historique:
received: 15 06 2019
revised: 16 08 2019
accepted: 04 09 2019
pubmed: 14 9 2019
medline: 3 3 2020
entrez: 14 9 2019
Statut: ppublish

Résumé

Depending on the amount of light, the photosystem II (PSII) antennae or Light Harvesting Complexes (LHCII) switch between two states within the thylakoid membranes of higher plants, i.e., a light-harvesting and a photoprotective mode. This switch is co-regulated by a pH gradient (ΔpH) across the membrane and the interaction with the PSII subunit S (PsbS) that is proposed to induce LHCII aggregation. Herein we employ all-atom and coarse-grained molecular simulations of the major LHCII trimer at low and excess ΔpH, as well as in complexation with PsbS within a native thylakoid membrane model. Our results demonstrate the aggregation potential of LHCII and, consistent with the experimental literature, reveal the role of PsbS at atomic resolution. PsbS alters the LHCII-thylakoid lipid interactions and restores the LHCII mobility that is lost in the transition to photoprotective conditions (low lumenal pH). In agreement with this finding, diffusion of the integral membrane protein LHCII is dependent on both, electrostatic interactions and hydrophobic mismatch, while it does not obey the Saffman-Delbrück diffusion model.

Identifiants

DOI: 10.1016/j.bbamem.2019.183059 PMID: 31518553
pubmed: 31518553
pii: S0005-2736(19)30205-6
doi: 10.1016/j.bbamem.2019.183059
pii:
doi:

Substances chimiques

Light-Harvesting Protein Complexes 0
Photosystem II Protein Complex 0

Types de publication

Journal Article Research Support, Non-U.S. Gov't

Langues

eng

Sous-ensembles de citation

IM

Pagination

183059

Informations de copyright

Copyright © 2019 Elsevier B.V. All rights reserved.

Auteurs

Vangelis Daskalakis (V)

Department of Environmental Science and Technology, Cyprus University of Technology, 30 Archbishop Kyprianou Str., 3603 Limassol, Cyprus. Electronic address: evangelos.daskalakis@cut.ac.cy.

Sotiris Papadatos (S)

Department of Environmental Science and Technology, Cyprus University of Technology, 30 Archbishop Kyprianou Str., 3603 Limassol, Cyprus.

Ulrich Kleinekathöfer (U)

Jacobs University Bremen, Department of Physics & Earth Sciences, Campus Ring 1, 28759 Bremen, Germany.

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Classifications MeSH

questionsmedicales.fr › Sciences de l'information › Méthodologies informatiques › Simulation numérique › Fine tuning of the photosystem II major...
questionsmedicales.fr › Phénomènes chimiques › Concentration en ions d'hydrogène › Fine tuning of the photosystem II major...
questionsmedicales.fr › Phénomènes physiques › Rayonnement › Rayonnement non ionisant › Lumière › Fine tuning of the photosystem II major...
questionsmedicales.fr › Acides aminés, peptides et protéines › Protéines › Protéines végétales › Protéines chloroplastiques › Protéines de la membrane thylakoïdale › Complexe protéique du centre réactionnel de la photosynthèse › Complexes collecteurs de lumière › Fine tuning of the photosystem II major...
questionsmedicales.fr › Techniques d'investigation › Modèles théoriques › Modèles moléculaires › Fine tuning of the photosystem II major...
questionsmedicales.fr › Acides aminés, peptides et protéines › Protéines › Protéines végétales › Protéines chloroplastiques › Protéines de la membrane thylakoïdale › Complexe protéique du centre réactionnel de la photosynthèse › Complexe protéique du photosystème II › Fine tuning of the photosystem II major...
questionsmedicales.fr › Phénomènes physiologiques › Phénomènes pharmacologiques et toxicologiques › Phénomènes pharmacologiques › Relation structure-activité › Fine tuning of the photosystem II major...
questionsmedicales.fr › Cellules › Structures cellulaires › Espace intracellulaire › Cytoplasme › Structures cytoplasmiques › Organites › Plastes › Chloroplastes › Thylacoïdes › Fine tuning of the photosystem II major...