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| Presentation | 2009-10-22 16:30 [Invited Talk] Dynamics and Hydration Behavior of Collagen Model Polypeptides in Aqueous Media Toshiyuki Shikata, Ayako Minakawa, Nao Yoshida, Kenji Okuyama (Osaka Univ.)  US2009-65 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | The structure, dynamics and hydration behavior of collagen model polypeptides, (Pro-Pro-Gly)n (PPGn), were investigated in aqueous media over a wide temperature range using broad band dielectric relaxation (DR) techniques that spanned frequencies from 1 kHz to 20 GHz. PPG5 molecules dissolved in solution as single chains without forming triple helices due to their low molecular weight or length, and behaved random coils bearing fully ionized amino and carboxy termini and the hydration number ca. 9 per amino acid residue. On the other hand, PPG10 formed mixtures of mono-disperse rods as triple helices and random coils of single chains. Since the fractions of these states were precisely determined via the obtained DR spectra, the triple helix-to-single coil transition was considered thermodynamically based on the equilibrium constant calculated from the fractions assuming the triple helix-to-single coil transition as a kind of chemical reaction. Furthermore, the hydration number of PPG10 in the triple helix state in solution was estimated to be ca. 2 per amino acid residue and was close to the number of water molecules hydrated to PPG10 in single crystals forming triple helices. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Collagen model polypeptide / Triple helix-single coil transition / Dielectric relaxation / Equilibrium constant / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 109, no. 239, US2009-65, pp. 49-54, Oct. 2009. | |
| Paper # | US2009-65 | |
| Date of Issue | 2009-10-15 (US) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | US2009-65 |
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| Conference Information | |
| Committee | US |
| Conference Date | 2009-10-22 - 2009-10-23 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Institute of Industrial Science, the University of Tokyo |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Material Proparty, General |
| Paper Information | |
| Registration To | US |
| Conference Code | 2009-10-US |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Dynamics and Hydration Behavior of Collagen Model Polypeptides in Aqueous Media |
| Sub Title (in English) | |
| Keyword(1) | Collagen model polypeptide |
| Keyword(2) | Triple helix-single coil transition |
| Keyword(3) | Dielectric relaxation |
| Keyword(4) | Equilibrium constant |
| Keyword(5) | |
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| 1st Author's Name | Toshiyuki Shikata |
| 1st Author's Affiliation | Osaka University (Osaka Univ.) |
| 2nd Author's Name | Ayako Minakawa |
| 2nd Author's Affiliation | Osaka University (Osaka Univ.) |
| 3rd Author's Name | Nao Yoshida |
| 3rd Author's Affiliation | Osaka University (Osaka Univ.) |
| 4th Author's Name | Kenji Okuyama |
| 4th Author's Affiliation | Osaka University (Osaka Univ.) |
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| Speaker | Author-1 |
| Date Time | 2009-10-22 16:30:00 |
| Presentation Time | 55 minutes |
| Registration for | US |
| Paper # | US2009-65 |
| Volume (vol) | vol.109 |
| Number (no) | no.239 |
| Page | pp.49-54 |
| #Pages | 6 |
| Date of Issue | 2009-10-15 (US) |
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