1kfh
From Proteopedia
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| - | [[Image:1kfh.jpg|left|200px]] | + | [[Image:1kfh.jpg|left|200px]] |
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| - | '''Solution Structure of alpha-Bungarotoxin by NMR Spectroscopy''' | + | {{Structure |
| + | |PDB= 1kfh |SIZE=350|CAPTION= <scene name='initialview01'>1kfh</scene> | ||
| + | |SITE= | ||
| + | |LIGAND= | ||
| + | |ACTIVITY= | ||
| + | |GENE= | ||
| + | }} | ||
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| + | '''Solution Structure of alpha-Bungarotoxin by NMR Spectroscopy''' | ||
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==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1KFH is a [ | + | 1KFH is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Bungarus_multicinctus Bungarus multicinctus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KFH OCA]. |
==Reference== | ==Reference== | ||
| - | NMR structural analysis of alpha-bungarotoxin and its complex with the principal alpha-neurotoxin-binding sequence on the alpha 7 subunit of a neuronal nicotinic acetylcholine receptor., Moise L, Piserchio A, Basus VJ, Hawrot E, J Biol Chem. 2002 Apr 5;277(14):12406-17. Epub 2002 Jan 14. PMID:[http:// | + | NMR structural analysis of alpha-bungarotoxin and its complex with the principal alpha-neurotoxin-binding sequence on the alpha 7 subunit of a neuronal nicotinic acetylcholine receptor., Moise L, Piserchio A, Basus VJ, Hawrot E, J Biol Chem. 2002 Apr 5;277(14):12406-17. Epub 2002 Jan 14. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11790782 11790782] |
[[Category: Bungarus multicinctus]] | [[Category: Bungarus multicinctus]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
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[[Category: long snake neurotoxin]] | [[Category: long snake neurotoxin]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 12:16:45 2008'' |
Revision as of 10:16, 20 March 2008
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Solution Structure of alpha-Bungarotoxin by NMR Spectroscopy
Overview
We report a new, higher resolution NMR structure of alpha-bungarotoxin that defines the structure-determining disulfide core and beta-sheet regions. We further report the NMR structure of the stoichiometric complex formed between alpha-bungarotoxin and a recombinantly expressed 19-mer peptide ((178)IPGKRTESFYECCKEPYPD(196)) derived from the alpha7 subunit of the chick neuronal nicotinic acetylcholine receptor. A comparison of these two structures reveals binding-induced stabilization of the flexible tip of finger II in alpha-bungarotoxin. The conformational rearrangements in the toxin create an extensive binding surface involving both sides of the alpha7 19-mer hairpin-like structure. At the contact zone, Ala(7), Ser(9), and Ile(11) in finger I and Arg(36), Lys(38), Val(39), and Val(40) in finger II of alpha-bungarotoxin interface with Phe(186), Tyr(187), Glu(188), and Tyr(194) in the alpha7 19-mer underscoring the importance of receptor aromatic residues as critical neurotoxin-binding determinants. Superimposing the structure of the complex onto that of the acetylcholine-binding protein (1I9B), a soluble homologue of the extracellular domain of the alpha7 receptor, places alpha-bungarotoxin at the peripheral surface of the inter-subunit interface occluding the agonist-binding site. The disulfide-rich core of alpha-bungarotoxin is suggested to be tilted in the direction of the membrane surface with finger II extending into the proposed ligand-binding cavity.
About this Structure
1KFH is a Single protein structure of sequence from Bungarus multicinctus. Full crystallographic information is available from OCA.
Reference
NMR structural analysis of alpha-bungarotoxin and its complex with the principal alpha-neurotoxin-binding sequence on the alpha 7 subunit of a neuronal nicotinic acetylcholine receptor., Moise L, Piserchio A, Basus VJ, Hawrot E, J Biol Chem. 2002 Apr 5;277(14):12406-17. Epub 2002 Jan 14. PMID:11790782
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