1idh: Difference between revisions
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[[Image:1idh.gif|left|200px]] | [[Image:1idh.gif|left|200px]] | ||
'''THE NMR SOLUTION STRUCTURE OF THE COMPLEX FORMED BETWEEN ALPHA-BUNGAROTOXIN AND AN 18MER COGNATE PEPTIDE''' | {{Structure | ||
|PDB= 1idh |SIZE=350|CAPTION= <scene name='initialview01'>1idh</scene> | |||
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'''THE NMR SOLUTION STRUCTURE OF THE COMPLEX FORMED BETWEEN ALPHA-BUNGAROTOXIN AND AN 18MER COGNATE PEPTIDE''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1IDH is a [ | 1IDH is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Bungarus_multicinctus Bungarus multicinctus] and [http://en.wikipedia.org/wiki/Torpedo_californica Torpedo californica]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1IDH OCA]. | ||
==Reference== | ==Reference== | ||
The solution structure of the complex formed between alpha-bungarotoxin and an 18-mer cognate peptide derived from the alpha 1 subunit of the nicotinic acetylcholine receptor from Torpedo californica., Zeng H, Moise L, Grant MA, Hawrot E, J Biol Chem. 2001 Jun 22;276(25):22930-40. Epub 2001 Apr 18. PMID:[http:// | The solution structure of the complex formed between alpha-bungarotoxin and an 18-mer cognate peptide derived from the alpha 1 subunit of the nicotinic acetylcholine receptor from Torpedo californica., Zeng H, Moise L, Grant MA, Hawrot E, J Biol Chem. 2001 Jun 22;276(25):22930-40. Epub 2001 Apr 18. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11312275 11312275] | ||
[[Category: Bungarus multicinctus]] | [[Category: Bungarus multicinctus]] | ||
[[Category: Protein complex]] | [[Category: Protein complex]] | ||
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[[Category: protein-protein interaction]] | [[Category: protein-protein interaction]] | ||
''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 11:48:52 2008'' | ||
Revision as of 12:48, 20 March 2008
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THE NMR SOLUTION STRUCTURE OF THE COMPLEX FORMED BETWEEN ALPHA-BUNGAROTOXIN AND AN 18MER COGNATE PEPTIDE
OverviewOverview
The region encompassing residues 181-98 on the alpha1 subunit of the muscle-type nicotinic acetylcholine receptor forms a major determinant for the binding of alpha-neurotoxins. We have prepared an (15)N-enriched 18-amino acid peptide corresponding to the sequence in this region to facilitate structural elucidation by multidimensional NMR. Our aim was to determine the structural basis for the high affinity, stoichiometric complex formed between this cognate peptide and alpha-bungarotoxin, a long alpha-neurotoxin. Resonances in the complex were assigned through heteronuclear and homonuclear NMR experiments, and the resulting interproton distance constraints were used to generate ensemble structures of the complex. Thr(8), Pro(10), Lys(38), Val(39), Val(40), and Pro(69) in alpha-bungarotoxin and Tyr(189), Tyr(190), Thr(191), Cys(192), Asp(195), and Thr(196) in the peptide participate in major intermolecular contacts. A comparison of the free and bound alpha-bungarotoxin structures reveals significant conformational rearrangements in flexible regions of alpha-bungarotoxin, mainly loops I, II, and the C-terminal tail. Furthermore, several of the calculated structures suggest that cation-pi interactions may be involved in binding. The root mean square deviation of the polypeptide backbone in the complex is 2.07 A. This structure provides, to date, the highest resolution description of the contacts between a prototypic alpha-neurotoxin and its cognate recognition sequence.
About this StructureAbout this Structure
1IDH is a Protein complex structure of sequences from Bungarus multicinctus and Torpedo californica. Full crystallographic information is available from OCA.
ReferenceReference
The solution structure of the complex formed between alpha-bungarotoxin and an 18-mer cognate peptide derived from the alpha 1 subunit of the nicotinic acetylcholine receptor from Torpedo californica., Zeng H, Moise L, Grant MA, Hawrot E, J Biol Chem. 2001 Jun 22;276(25):22930-40. Epub 2001 Apr 18. PMID:11312275
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