Structural and functional roles of non-bilayer lipid phases of chloroplast thylakoid membranes and mitochondrial inner membranes

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F22%3A00557639" target="_blank" >RIV/86652079:_____/22:00557639 - isvavai.cz</a>

Alternative codes found

RIV/61988987:17310/22:A2302ECR RIV/61988987:17310/22:N2302ECR

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0163782722000182?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0163782722000182?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.plipres.2022.101163" target="_blank" >10.1016/j.plipres.2022.101163</a>

Result language

angličtina

Original language name

Structural and functional roles of non-bilayer lipid phases of chloroplast thylakoid membranes and mitochondrial inner membranes

Original language description

The 'standard' fluid-mosaic membrane model can provide a framework for the operation of the photosynthetic and respiratory electron transport systems, the generation of the proton motive force (pmf) and its utilization for ATP synthesis according to the chemiosmotic theory. However, this model, with the bilayer organization of all lipid molecules, assigns no function to non-bilayer lipids while in recent years it became clear that the two fundamental energy transducing membranes of the biosphere, chloroplast thylakoid membranes (TMs) and inner mitochondrial membranes (IMMs), contain large amounts of non-bilayer (non-lamellar) lipid phases.In this review, we summarize our understanding on the role of non-lamellar phases in TMs and IMMs: (i) We propose that for these membrane vesicles the dynamic exchange model (DEM) provides a more suitable framework than the 'standard' model, DEM complements the 'standard' model by assuming the co-existence of bilayer and non-bilayer phases and their interactions, which contribute to the structural dynamics of the membrane systems and safe-guard the membranes' high protein:lipid ratios. (ii) Non-bilayer phases play pivotal roles in membrane fusion and intermembrane lipid exchanges essential processes in the self-assembly of these highly folded intricate membranes. (iii) The photoprotective, lipocalin-like lumenal enzyme, violaxanthin deepoxidase, in its active state requires the presence of non-bilayer lipid phase. (iv) Cardiotoxins, water-soluble polypeptides, induce non-bilayer phases in mitochondria. (v) ATP synthesis, in mammalian heart IMMs, is positively correlated with the amount of non-bilayer packed lipids with restricted mobility. (vi) The hypothesized sub-compartments, due to non-lamellar phases, are proposed to enhance the utilization of pmf and might contribute to the recently documented functional independence of individual cristae within the same mitochondrion. Further research is needed to identify and characterize the structural entities associated with the observed non-bilayer phases and albeit fundamental questions remain to be elucidated, non-lamellar lipid phases should be considered on a par with the bilayer phase, with which they co-exist in functional TMs and IMMs.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10610 - Biophysics

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Progress in Lipid Research

ISSN

0163-7827

e-ISSN

1873-2194

Volume of the periodical

86

Issue of the periodical within the volume

APR

Country of publishing house

GB - UNITED KINGDOM

Number of pages

12

Pages from-to

101163

UT code for WoS article

000792922100005

EID of the result in the Scopus database

2-s2.0-85127312895