Determinants for Membrane Fusion Induced by Cholesterol-Modified DNA Zippers.
(2008) In The Journal of Physical Chemistry Part B 112(28). p.8264-8274- Abstract
- Intracellular membrane fusion is coordinated by membrane-anchored fusion proteins. The cytosolic domains of these proteins form a specific complex that pulls the membranes into close proximity. Although some results indicate that membrane merger can be accomplished solely on the basis of proximity, others emphasize the importance of bilayer stress exerted by transmembrane peptides. In a reductionist approach, we recently introduced a fusion machinery built from cholesterol-modified DNA zippers to mimic fusion protein function. Aiming to further optimize DNA-mediated fusion, we varied in this work length and number of DNA strands and used either one or two cholesterol groups for membrane anchoring of DNA. The results reveal that the use of... (More)
- Intracellular membrane fusion is coordinated by membrane-anchored fusion proteins. The cytosolic domains of these proteins form a specific complex that pulls the membranes into close proximity. Although some results indicate that membrane merger can be accomplished solely on the basis of proximity, others emphasize the importance of bilayer stress exerted by transmembrane peptides. In a reductionist approach, we recently introduced a fusion machinery built from cholesterol-modified DNA zippers to mimic fusion protein function. Aiming to further optimize DNA-mediated fusion, we varied in this work length and number of DNA strands and used either one or two cholesterol groups for membrane anchoring of DNA. The results reveal that the use of two cholesterol anchors is essential to prevent cDNA strands from shuttling to the same membrane, which leads to vesicle release instead of membrane merger. A surface coverage of 6-13 DNA strands was a precondition for efficient fusion, whereas fusion was insensitive to DNA length within the tested range. Besides lipid mixing, we also demonstrate DNA-induced content mixing of large unilamellar vesicles composed of the most abundant cellular lipids phosphatidylcholine, phosphatidylethanolamine, cholesterol, and sphingomyelin. Taken together, DNA-mediated fusion emerges as a promising tool for the functionalization of artificial and biological membranes and may help to dissect the functional role of fusion proteins. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1168582
- author
- Stengel, Gudrun LU ; Simonsson, Lisa LU ; Campbell, Richard LU and Höök, Fredrik LU
- organization
- publishing date
- 2008
- type
- Contribution to journal
- publication status
- published
- subject
- in
- The Journal of Physical Chemistry Part B
- volume
- 112
- issue
- 28
- pages
- 8264 - 8274
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- wos:000257542500008
- pmid:18570399
- scopus:50249174449
- ISSN
- 1520-5207
- DOI
- 10.1021/jp802005b
- language
- English
- LU publication?
- yes
- id
- 189d8ba8-3250-4ba7-9458-792e53f1d03f (old id 1168582)
- date added to LUP
- 2016-04-01 14:00:03
- date last changed
- 2024-08-20 11:37:41
@article{189d8ba8-3250-4ba7-9458-792e53f1d03f,
abstract = {{Intracellular membrane fusion is coordinated by membrane-anchored fusion proteins. The cytosolic domains of these proteins form a specific complex that pulls the membranes into close proximity. Although some results indicate that membrane merger can be accomplished solely on the basis of proximity, others emphasize the importance of bilayer stress exerted by transmembrane peptides. In a reductionist approach, we recently introduced a fusion machinery built from cholesterol-modified DNA zippers to mimic fusion protein function. Aiming to further optimize DNA-mediated fusion, we varied in this work length and number of DNA strands and used either one or two cholesterol groups for membrane anchoring of DNA. The results reveal that the use of two cholesterol anchors is essential to prevent cDNA strands from shuttling to the same membrane, which leads to vesicle release instead of membrane merger. A surface coverage of 6-13 DNA strands was a precondition for efficient fusion, whereas fusion was insensitive to DNA length within the tested range. Besides lipid mixing, we also demonstrate DNA-induced content mixing of large unilamellar vesicles composed of the most abundant cellular lipids phosphatidylcholine, phosphatidylethanolamine, cholesterol, and sphingomyelin. Taken together, DNA-mediated fusion emerges as a promising tool for the functionalization of artificial and biological membranes and may help to dissect the functional role of fusion proteins.}},
author = {{Stengel, Gudrun and Simonsson, Lisa and Campbell, Richard and Höök, Fredrik}},
issn = {{1520-5207}},
language = {{eng}},
number = {{28}},
pages = {{8264--8274}},
publisher = {{The American Chemical Society (ACS)}},
series = {{The Journal of Physical Chemistry Part B}},
title = {{Determinants for Membrane Fusion Induced by Cholesterol-Modified DNA Zippers.}},
url = {{http://dx.doi.org/10.1021/jp802005b}},
doi = {{10.1021/jp802005b}},
volume = {{112}},
year = {{2008}},
}