Enhanced Tubulation of Liposome Containing Cardiolipin by MamY Protein from Magnetotactic Bacteria
Lipid tubules are of particular interest for many potential applications in nanotechnology. Among various lipid tubule fabrication techniques, the morphological regulation of membrane structure by proteins mimicking biological processes may provide the chances to form lipid tubes with highly tuned s...
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Published in | Biotechnology journal Vol. 13; no. 12; p. e1800087 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
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Germany
01.12.2018
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Abstract | Lipid tubules are of particular interest for many potential applications in nanotechnology. Among various lipid tubule fabrication techniques, the morphological regulation of membrane structure by proteins mimicking biological processes may provide the chances to form lipid tubes with highly tuned structures. Magnetotactic bacteria synthesize magnetosomes (a unique prokaryotic organelle comprising a magnetite crystal within a lipid envelope). MamY protein is previously identified as the magnetosome protein responsible for magnetosome vesicle formation and stabilization. Furthermore, MamY is shown in vitro liposome tubulation activity. In this study, the interaction of MamY and phospholipids is investigated by using a lipids-immobilized membrane strip and a peptide array. Here, the binding of MamY to the anionic phospholipid, cardiolipin, is found and enhanced liposome tubulation efficiency. The authors propose the interaction is responsible for recruiting and locating cardiolipin to elongate liposome in vitro. The authors also suggest a similar mechanism for the invagination site in magnetosomes vesicle formation, where the lipid itself contributes further to increasing the curvature. These findings are highly important to develop an effective biomimetic synthesis technique of lipid tubules and to elucidate the unique prokaryotic organelle formation in magnetotactic bacteria. |
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AbstractList | Lipid tubules are of particular interest for many potential applications in nanotechnology. Among various lipid tubule fabrication techniques, the morphological regulation of membrane structure by proteins mimicking biological processes may provide the chances to form lipid tubes with highly tuned structures. Magnetotactic bacteria synthesize magnetosomes (a unique prokaryotic organelle comprising a magnetite crystal within a lipid envelope). MamY protein is previously identified as the magnetosome protein responsible for magnetosome vesicle formation and stabilization. Furthermore, MamY is shown in vitro liposome tubulation activity. In this study, the interaction of MamY and phospholipids is investigated by using a lipids-immobilized membrane strip and a peptide array. Here, the binding of MamY to the anionic phospholipid, cardiolipin, is found and enhanced liposome tubulation efficiency. The authors propose the interaction is responsible for recruiting and locating cardiolipin to elongate liposome in vitro. The authors also suggest a similar mechanism for the invagination site in magnetosomes vesicle formation, where the lipid itself contributes further to increasing the curvature. These findings are highly important to develop an effective biomimetic synthesis technique of lipid tubules and to elucidate the unique prokaryotic organelle formation in magnetotactic bacteria. |
Author | Matsunaga, Tadashi Tanaka, Masayoshi Staniland, Sarah S Evans, Stephen D Okochi, Mina Johnson, Benjamin R G Arakaki, Atsushi Suwatthanarak, Thanawat |
Author_xml | – sequence: 1 givenname: Masayoshi surname: Tanaka fullname: Tanaka, Masayoshi organization: Department of Chemical Science and Engineering, Tokyo Institute of Technology, 2-12-1, O-okayama, Meguro-ku, Tokyo 152-8552, Japan – sequence: 2 givenname: Thanawat surname: Suwatthanarak fullname: Suwatthanarak, Thanawat organization: Department of Chemical Science and Engineering, Tokyo Institute of Technology, 2-12-1, O-okayama, Meguro-ku, Tokyo 152-8552, Japan – sequence: 3 givenname: Atsushi surname: Arakaki fullname: Arakaki, Atsushi organization: Division of Biotechnology and Life Science, Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan – sequence: 4 givenname: Benjamin R G surname: Johnson fullname: Johnson, Benjamin R G organization: School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, UK – sequence: 5 givenname: Stephen D surname: Evans fullname: Evans, Stephen D organization: School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, UK – sequence: 6 givenname: Mina surname: Okochi fullname: Okochi, Mina organization: Department of Chemical Science and Engineering, Tokyo Institute of Technology, 2-12-1, O-okayama, Meguro-ku, Tokyo 152-8552, Japan – sequence: 7 givenname: Sarah S surname: Staniland fullname: Staniland, Sarah S organization: Department of Chemistry, University of Sheffield, Sheffield S3 7HF, UK – sequence: 8 givenname: Tadashi surname: Matsunaga fullname: Matsunaga, Tadashi organization: Faculty of Science and Engineering, Waseda University, 3-4-1, Okubo, Shinjuku-ku, Tokyo 169-8555, Japan |
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Keywords | magnetotactic bacteria peptide arrays membrane tubulation cardiolipin magnetosome |
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SubjectTerms | Bacterial Proteins - chemistry Bacterial Proteins - genetics Biomimetics Cardiolipins - chemistry Gram-Negative Bacteria - chemistry Gram-Negative Bacteria - genetics Liposomes - chemistry Magnetosomes - chemistry |
Title | Enhanced Tubulation of Liposome Containing Cardiolipin by MamY Protein from Magnetotactic Bacteria |
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