1p9f: Difference between revisions
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==Overview== | ==Overview== | ||
Neurokinin B (NKB), a decapeptide of mammalian origin exhibits a variety | Neurokinin B (NKB), a decapeptide of mammalian origin exhibits a variety of biological activities such as regulatory functions in reproduction, pre-eclampsia and neuroprotection in Alzheimer's disease. In order to gain insight into structure-function relationship, three-dimensional structure of NKB has been investigated using CD spectropolarimetry and two-dimensional proton nuclear magnetic resonance (2D 1H-NMR) spectroscopy in aqueous and membrane mimetic solvents. Unambiguous NMR assignments of resonances have been made with the aid of correlation spectroscopy (DQF-COSY and TOCSY) experiments and Nuclear Overhauser Effect Spectroscopy (NOESY) experiments. Distance constraints obtained from the NMR data have been used to generate a family of structures, which have been refined using restrained energy minimization and dynamics. Our data show that a helical structure is induced in NKB, in presence of perdeuterated dodecyl phosphocholine (DPC) micelles, a membrane model system. Further, the conformation adopted by NKB in presence of DPC micelles represents a structural motif typical of neurokinin-3 selective agonists. | ||
==About this Structure== | ==About this Structure== | ||
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Three dimensional structure of mammalian tachykinin peptide neurokinin B bound to lipid micelles., Mantha AK, Chandrashekar IR, Baquer NZ, Cowsik SM, J Biomol Struct Dyn. 2004 Oct;22(2):137-48. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=15317475 15317475] | Three dimensional structure of mammalian tachykinin peptide neurokinin B bound to lipid micelles., Mantha AK, Chandrashekar IR, Baquer NZ, Cowsik SM, J Biomol Struct Dyn. 2004 Oct;22(2):137-48. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=15317475 15317475] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
[[Category: Baquer, N | [[Category: Baquer, N Z.]] | ||
[[Category: Chandrashekar, I | [[Category: Chandrashekar, I R.]] | ||
[[Category: Cowsik, S | [[Category: Cowsik, S M.]] | ||
[[Category: Mantha, A | [[Category: Mantha, A K.]] | ||
[[Category: neuropeptide]] | [[Category: neuropeptide]] | ||
[[Category: protein]] | [[Category: protein]] | ||
[[Category: structures from dyana]] | [[Category: structures from dyana]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 14:26:32 2008'' | ||
Revision as of 12:26, 21 February 2008
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NMR Structure of Neurokinin B from DYANA
Overview
Neurokinin B (NKB), a decapeptide of mammalian origin exhibits a variety of biological activities such as regulatory functions in reproduction, pre-eclampsia and neuroprotection in Alzheimer's disease. In order to gain insight into structure-function relationship, three-dimensional structure of NKB has been investigated using CD spectropolarimetry and two-dimensional proton nuclear magnetic resonance (2D 1H-NMR) spectroscopy in aqueous and membrane mimetic solvents. Unambiguous NMR assignments of resonances have been made with the aid of correlation spectroscopy (DQF-COSY and TOCSY) experiments and Nuclear Overhauser Effect Spectroscopy (NOESY) experiments. Distance constraints obtained from the NMR data have been used to generate a family of structures, which have been refined using restrained energy minimization and dynamics. Our data show that a helical structure is induced in NKB, in presence of perdeuterated dodecyl phosphocholine (DPC) micelles, a membrane model system. Further, the conformation adopted by NKB in presence of DPC micelles represents a structural motif typical of neurokinin-3 selective agonists.
About this Structure
1P9F is a Single protein structure of sequence from [1]. Full crystallographic information is available from OCA.
Reference
Three dimensional structure of mammalian tachykinin peptide neurokinin B bound to lipid micelles., Mantha AK, Chandrashekar IR, Baquer NZ, Cowsik SM, J Biomol Struct Dyn. 2004 Oct;22(2):137-48. PMID:15317475
Page seeded by OCA on Thu Feb 21 14:26:32 2008
