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Itagaki T, Ito Y, Ueda M. Peptide flat-rod formation by precise arrangement among enantiomeric hydrophobic helices. J Colloid Interface Sci 2022; 617:129-135. [DOI: 10.1016/j.jcis.2022.02.141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 02/16/2022] [Accepted: 02/28/2022] [Indexed: 11/15/2022]
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Rahman MM, Ueda M, Son K, Seo S, Takeoka S, Hirose T, Ito Y. Tubular Network Formation by Mixing Amphiphilic Polypeptides with Differing Hydrophilic Blocks. Biomacromolecules 2019; 20:3908-3914. [PMID: 31532187 DOI: 10.1021/acs.biomac.9b00986] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Artificial tubular networks are promising structures for biomaterial applications because of their large surface areas. A tubular network was formed by co-assembling two different amphiphilic polypeptides, poly(ethylene glycol)-b-(l-Leu-Aib)6 (PL12) and polysarcosine-b-(l-Leu-Aib)6 (SL12). They both have the same hydrophobic 12-mer helical block (l-Leu-Aib)6 but different hydrophilic chains, poly(ethylene glycol) and polysarcosine. In water, both polypeptides self-assembled into a tubular structure having a uniform 80 nm diameter that was formed by packing among the hydrophobic L12 blocks. The SL12 nanotubes were short (200 nm), straight, and robust. PL12 formed long (>1 μm), bendable, and fusogenic nanotubes. The amphiphiles were then co-assembled with various mixing ratios to form tubular networks. Higher concentrations of PL12 made the nanotubes more bendable and fusogenic between open tube ends, which produced branching junctions under heat treatment.
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Affiliation(s)
- Md Mofizur Rahman
- Emergent Bioengineering Materials Research Team , RIKEN Center for Emergent Matter Science (CEMS) , 2-1 Hirosawa , Wako , Saitama 351-0198 , Japan.,Graduate School of Science and Engineering , Saitama University , 255 Shimo-Okubo , Sakura-ku, Saitama City , Saitama 338-8570 , Japan.,Faculty of Allied Health Sciences , Daffodil International University , 4/2, Sobhanbag , Mirpur Road , Dhaka 1207 , Bangladesh
| | - Motoki Ueda
- Emergent Bioengineering Materials Research Team , RIKEN Center for Emergent Matter Science (CEMS) , 2-1 Hirosawa , Wako , Saitama 351-0198 , Japan.,Nano Medical Engineering Laboratory , RIKEN Center for Pioneering Research (CPR) , 2-1 Hirosawa , Wako , Saitama 351-0198 , Japan
| | - Kon Son
- Emergent Bioengineering Materials Research Team , RIKEN Center for Emergent Matter Science (CEMS) , 2-1 Hirosawa , Wako , Saitama 351-0198 , Japan.,Graduate School of Advanced Science and Engineering , Waseda University , 2-2 TWIns, Wakamatsu-cho , Shinjuku-ku, Tokyo 162-8480 Japan
| | - Siyoong Seo
- Emergent Bioengineering Materials Research Team , RIKEN Center for Emergent Matter Science (CEMS) , 2-1 Hirosawa , Wako , Saitama 351-0198 , Japan
| | - Shinji Takeoka
- Graduate School of Advanced Science and Engineering , Waseda University , 2-2 TWIns, Wakamatsu-cho , Shinjuku-ku, Tokyo 162-8480 Japan
| | - Takuji Hirose
- Graduate School of Science and Engineering , Saitama University , 255 Shimo-Okubo , Sakura-ku, Saitama City , Saitama 338-8570 , Japan
| | - Yoshihiro Ito
- Emergent Bioengineering Materials Research Team , RIKEN Center for Emergent Matter Science (CEMS) , 2-1 Hirosawa , Wako , Saitama 351-0198 , Japan.,Nano Medical Engineering Laboratory , RIKEN Center for Pioneering Research (CPR) , 2-1 Hirosawa , Wako , Saitama 351-0198 , Japan
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Itagaki T, Uji H, Imai T, Kimura S. Sterical Recognition at Helix-Helix Interface of Leu-Aib-Based Polypeptides with and without a GxxxG-Motif. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:7249-7254. [PMID: 31082236 DOI: 10.1021/acs.langmuir.9b00620] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
An amphiphilic polypeptide, poly(sarcosine)- b-(l-Leu-Aib)8 (SL16), was reported to self-assemble into vesicles. A GxxxG motif, which is known to induce helix dimerization, is incorporated into the hydrophobic helical block of SL16 to synthesize poly(sarcosine)- b-(l-Leu-Aib)2-(Gly-Aib-l-Leu-Aib-Gly-Aib)-(l-Leu-Aib)3 (SG16). SG16 shows helix association in ethanol at a high concentration and low temperatures, which is not observed with SL16. SG16 self-assembles into vesicles, but are found to be more susceptible to rupture by the addition of Triton X-100 than SL16 vesicles. A mixture of SL16 and SG16 self-assembles into small sheets and micelles likely because of mismatch of the modes of helix association arising from sterical accommodation of iso-butyl groups at the helix-helix interface.
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Affiliation(s)
- Toru Itagaki
- Department of Material Chemistry, Graduate School of Engineering , Kyoto University Kyoto-Daigaku-Katsura, Nishikyo-ku , Kyoto 615-8510 , Japan
| | - Hirotaka Uji
- Department of Material Chemistry, Graduate School of Engineering , Kyoto University Kyoto-Daigaku-Katsura, Nishikyo-ku , Kyoto 615-8510 , Japan
| | - Tomoya Imai
- Research Institute for Sustainable Humanosphere , Kyoto University , Gokasho, Uji-shi , Kyoto 611-0011 , Japan
| | - Shunsaku Kimura
- Department of Material Chemistry, Graduate School of Engineering , Kyoto University Kyoto-Daigaku-Katsura, Nishikyo-ku , Kyoto 615-8510 , Japan
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Uji H, Ogawa J, Itabashi K, Imai T, Kimura S. Compartmentalized host spaces accommodating guest aromatic molecules in a chiral way in a helix-peptide-aromatic framework. Chem Commun (Camb) 2018; 54:12483-12486. [PMID: 30338328 DOI: 10.1039/c8cc07380e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A novel host molecular assembly of a free-standing flat nanosheet with compartmentalized spaces was prepared using a bolaamphiphilic peptide composed of two amphiphilic helical peptides and an oligo(naphthaleneethynylene) (ONE) unit at the center of the molecule. The nanosheet possesses void host spaces that can accommodate two mol-equivalent ONE groups to form columns of ONE groups in a right-handed helical way and ONE channels over a long distance. The present molecular system therefore can provide a chiral pore channel for relatively large molecules.
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Affiliation(s)
- Hirotaka Uji
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto-Daigaku-Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
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Itagaki T, Kurauchi S, Uebayashi T, Uji H, Kimura S. Phase-Separated Molecular Assembly of a Nanotube Composed of Amphiphilic Polypeptides Having a Helical Hydrophobic Block. ACS OMEGA 2018; 3:7158-7164. [PMID: 31458878 PMCID: PMC6644537 DOI: 10.1021/acsomega.8b01073] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Accepted: 06/18/2018] [Indexed: 05/30/2023]
Abstract
Amphiphilic block polypeptides of poly(sarcosine)-b-(l- or d-Leu-Aib)6 (SL12OMe or SD12OMe) and poly(sarcosine)-b-(l-Leu-Aib)7 (SL14OMe) were reported to self-assemble into a nanotube morphology. Herein, we tried to construct a phase-separated nanotube by sticking two different kinds of nanotubes. SD12OMe nanotubes were found to stick to SL14OMe nanotubes with a heat treatment at 50 °C, but the sticking yield was limited. The amphiphilic polypeptides were functionalized by replacement of methyl ester with aromatic groups of N-ethylcarbazole (SL12Ecz) and naphthalimide (SD12NpiTEG), but they lost the ability to form homogeneous nanotubes. A fraction of the functionalized amphiphilic polypeptides mixing in the nanotube-forming amphiphilic polypeptides, a mixture of SL12OMe and SL12Ecz (9:1) as well as a mixture of SD12OMe and SD12NpiTEG (9:1), allowed nanotube formation. These two kinds of nanotubes partly stuck together with a heat treatment at 15 °C to maintain a segregated state of two kinds of aromatic groups along the nanotube, resulting in the formation of a phase-separated nanotube.
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