Cooperation of Helix Insertion and Lateral Pressure to Remodel Membranes

Mohammad A.A. Fakhree, Sjoerd A.J. Engelbertink, Kirsten A. Van Leijenhorst-Groener, Christian Blum, Mireille M.A.E. Claessens (Corresponding Author)

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Abstract

Nature has developed different protein mediated mechanisms to remodel cellular membranes. One of the proteins that is implicated in these processes is α-synuclein (αS). Here we investigate if besides αS's membrane bound amphipathic helix the disordered, solvent exposed tail of the protein contributes to membrane reshaping. We produced αS variants with elongated or truncated disordered solvent exposed domains. We observe a transformation of opaque multi lamellar vesicle solutions into nonscattering solutions containing smaller structures upon addition of all αS variants. Experimental data combined with model calculations show that the cooperation of helix insertion and lateral pressure exerted by the disordered domain makes the full length protein decidedly more efficient in membrane remodeling than the truncated version. Using disordered domains may not only be cost-efficient, it may also add a new level of control over vesicle fusion/fission by expansion or compaction of the domain.

Original languageEnglish
Pages (from-to)1217-1223
Number of pages7
JournalBiomacromolecules
Volume20
Issue number3
DOIs
Publication statusPublished - 11 Mar 2019

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Proteins
Membranes
Synucleins
Compaction
Fusion reactions
Costs

Keywords

  • UT-Hybrid-D

Cite this

Fakhree, Mohammad A.A. ; Engelbertink, Sjoerd A.J. ; Van Leijenhorst-Groener, Kirsten A. ; Blum, Christian ; Claessens, Mireille M.A.E. / Cooperation of Helix Insertion and Lateral Pressure to Remodel Membranes. In: Biomacromolecules. 2019 ; Vol. 20, No. 3. pp. 1217-1223.
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Cooperation of Helix Insertion and Lateral Pressure to Remodel Membranes. / Fakhree, Mohammad A.A.; Engelbertink, Sjoerd A.J.; Van Leijenhorst-Groener, Kirsten A.; Blum, Christian; Claessens, Mireille M.A.E. (Corresponding Author).

In: Biomacromolecules, Vol. 20, No. 3, 11.03.2019, p. 1217-1223.

Research output: Contribution to journalArticleAcademicpeer-review

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AU - Blum, Christian

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AB - Nature has developed different protein mediated mechanisms to remodel cellular membranes. One of the proteins that is implicated in these processes is α-synuclein (αS). Here we investigate if besides αS's membrane bound amphipathic helix the disordered, solvent exposed tail of the protein contributes to membrane reshaping. We produced αS variants with elongated or truncated disordered solvent exposed domains. We observe a transformation of opaque multi lamellar vesicle solutions into nonscattering solutions containing smaller structures upon addition of all αS variants. Experimental data combined with model calculations show that the cooperation of helix insertion and lateral pressure exerted by the disordered domain makes the full length protein decidedly more efficient in membrane remodeling than the truncated version. Using disordered domains may not only be cost-efficient, it may also add a new level of control over vesicle fusion/fission by expansion or compaction of the domain.

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