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| [[Image:1myu.gif|left|200px]] | | {{Seed}} |
| | [[Image:1myu.png|left|200px]] |
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| {{STRUCTURE_1myu| PDB=1myu | SCENE= }} | | {{STRUCTURE_1myu| PDB=1myu | SCENE= }} |
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| '''Lipid induced conformation of the tachykinin peptide Kassinin'''
| | ===Lipid induced conformation of the tachykinin peptide Kassinin=== |
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| ==Overview==
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| Both the aqueous and lipid-induced structure of Kassinin, a dodecapeptide of amphibian origin, has been studied by two-dimensional proton nuclear magnetic resonance (2D 1H-NMR) spectroscopy and distance geometry calculations. Unambiguous NMR assignments of protons have been made with the aid of correlation spectroscopy (DQF-COSY and TOCSY) experiments and nuclear Overhauser effect spectroscopy (NOESY and ROESY) experiments. The distance constraints obtained from the NMR data have been utilized in a distance geometry algorithm to generate a family of structures, which have been refined using restrained energy minimization and dynamics. These data show that, while in water Kassinin prefers to be in an extended chain conformation, in the presence of perdeuterated dodecylphosphocholine (DPC) micelles, a membrane model system, helical conformation is induced in the central core and C-terminal region (K4-M12) of the peptide. N-terminus though less defined also displays some degree of order and a possible turn structure. The conformation adopted by Kassinin in the presence of DPC micelles is consistent with the structural motif typical of neurokinin-1 selective agonists and with that reported for Eledoisin in hydrophobic environment.
| | The line below this paragraph, {{ABSTRACT_PUBMED_11245256}}, adds the Publication Abstract to the page |
| | (as it appears on PubMed at http://www.pubmed.gov), where 11245256 is the PubMed ID number. |
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| | {{ABSTRACT_PUBMED_11245256}} |
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| ==About this Structure== | | ==About this Structure== |
| 1MYU is a [[Single protein]] structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MYU OCA]. | | 1MYU is a [[Single protein]] structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MYU OCA]. |
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| ==Reference== | | ==Reference== |
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| [[Category: Helical core]] | | [[Category: Helical core]] |
| [[Category: Lipid induced conformation]] | | [[Category: Lipid induced conformation]] |
| ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 01:52:49 2008'' | | |
| | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 12:38:27 2008'' |
