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BANFF: bending of bilayer membranes by amphiphilic α-helices is necessary for form and function of organelles1.
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- Author(s): Könnel, Anne; Bugaeva, Wassilina; Gügel, Irene L.; Philippar, Katrin
- Source:
Biochemistry & Cell Biology. 2019, Vol. 97 Issue 3, p243-256. 14p. - Source:
- Additional Information
- Subject Terms:
- Abstract: By binding to and inserting into the lipid bilayer, amphiphilic α-helices of proteins are involved in the curvature of biological membranes in all organisms. In particular, they are involved in establishing the complex membrane architecture of intracellular organelles like the endoplasmatic reticulum, Golgi apparatus, mitochondria, and chloroplasts. Thus, amphiphilic α-helices are essential for maintenance of cellular metabolism and fitness of organisms. Here we focus on the structure and function of membrane-intrinsic proteins, which are involved in membrane curvature by amphiphilic α-helices, in mitochondria and chloroplasts of the eukaryotic model organisms yeast and Arabidopsis thaliana. Further, we propose a model for transport of fatty acids and lipid compounds across the envelope of chloroplasts in which amphiphilic α-helices might play a role. [ABSTRACT FROM AUTHOR]
- Abstract: En se liant et s'insérant dans la bicouche lipidique, les hélices α-amphiphiles des protéines sont impliquées dans la liaison et la courbures des membranes biologiques de tous les organismes. Elles sont en particulier impliquées dans la mise en place de l'architecture complexe des membranes des organelles intracellulaires comme le réticulum endoplasmique, l'appareil de Golgi, les mitochondries ou les chloroplastes. De ce fait, les hélices α sont essentielles au maintient du métabolisme cellulaire et au bon fonctionnement des organismes. Ici nous nous concentrerons sur la structure et la fonction des protéines membranaires, qui via des hélices α sont impliquées dans la courbure de la membrane des mitochondries et des chloroplastes, et ce chez deux organismes modèles eucaryotes, la levure et Arabidopsis thaliana. Dans un second temps nous présenterons un modèle pour le transport des acides gras et des composants lipidiques à travers l'enveloppe des chloroplastes qui pourrait être dépendant des hélices α-amphiphiles. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Biochemistry & Cell Biology is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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