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| | <StructureSection load='1hc9' size='340' side='right'caption='[[1hc9]], [[Resolution|resolution]] 1.80Å' scene=''> | | <StructureSection load='1hc9' size='340' side='right'caption='[[1hc9]], [[Resolution|resolution]] 1.80Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[1hc9]] is a 4 chain structure with 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=1HC9 OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1HC9 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[1hc9]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Bungarus_multicinctus Bungarus multicinctus] and [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1HC9 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1HC9 FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=IOD:IODIDE+ION'>IOD</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.8Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1abt|1abt]], [[1bxp|1bxp]], [[1haa|1haa]], [[1haj|1haj]], [[1hn7|1hn7]], [[1hoy|1hoy]], [[1idg|1idg]], [[1idh|1idh]], [[1idi|1idi]], [[1idl|1idl]], [[2btx|2btx]]</td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=IOD:IODIDE+ION'>IOD</scene></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=1hc9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1hc9 OCA], [http://pdbe.org/1hc9 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1hc9 RCSB], [http://www.ebi.ac.uk/pdbsum/1hc9 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1hc9 ProSAT]</span></td></tr> | + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1hc9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1hc9 OCA], [https://pdbe.org/1hc9 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1hc9 RCSB], [https://www.ebi.ac.uk/pdbsum/1hc9 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1hc9 ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/NXL1V_BUNMU NXL1V_BUNMU]] Produces peripheral paralysis by blocking neuromuscular transmission at the postsynaptic site. Binds to muscular and neuronal (alpha-7, alpha-8, and alpha-9) nicotinic acetylcholine receptors. [[http://www.uniprot.org/uniprot/NXL1A_BUNMU NXL1A_BUNMU]] Binds with high affinity to muscular and neuronal (alpha-7, alpha-8, and alpha-9) nicotinic acetylcholine receptors. Produces peripheral paralysis by blocking neuromuscular transmission at the postsynaptic site. Blocks the extracellular increase of dopamine evoked by nicotine only at the higher dose (4.2 uM).<ref>PMID:9305882</ref> <ref>PMID:9840221</ref> | + | [https://www.uniprot.org/uniprot/3L21V_BUNMU 3L21V_BUNMU] Binds with high affinity to muscular (alpha-1/CHRNA1) and neuronal (alpha-7/CHRNA7) nicotinic acetylcholine receptor (nAChR) and inhibits acetylcholine from binding to the receptor, thereby impairing neuromuscular and neuronal transmission.[UniProtKB:P60615]<ref>PMID:10497260</ref> |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | ==See Also== | | ==See Also== |
| - | *[[Binding site of AChR|Binding site of AChR]] | |
| | *[[Bungarotoxin|Bungarotoxin]] | | *[[Bungarotoxin|Bungarotoxin]] |
| | *[[Bungarotoxin 3D structures|Bungarotoxin 3D structures]] | | *[[Bungarotoxin 3D structures|Bungarotoxin 3D structures]] |
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| | [[Category: Bungarus multicinctus]] | | [[Category: Bungarus multicinctus]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Harel, M]] | + | [[Category: Synthetic construct]] |
| - | [[Category: Kasher, R]] | + | [[Category: Harel M]] |
| - | [[Category: Sussman, J L]] | + | [[Category: Kasher R]] |
| - | [[Category: 3- finger]] | + | [[Category: Sussman JL]] |
| - | [[Category: Acetylcholine receptor mimitope]]
| + | |
| - | [[Category: Alpha-bungarotoxin]]
| + | |
| - | [[Category: Protein-peptide complex]]
| + | |
| - | [[Category: Toxin]]
| + | |
| - | [[Category: Toxin-peptide complex]]
| + | |
| - | [[Category: Toxin/peptide]]
| + | |
| Structural highlights
Function
3L21V_BUNMU Binds with high affinity to muscular (alpha-1/CHRNA1) and neuronal (alpha-7/CHRNA7) nicotinic acetylcholine receptor (nAChR) and inhibits acetylcholine from binding to the receptor, thereby impairing neuromuscular and neuronal transmission.[UniProtKB:P60615][1]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
We have determined the crystal structure at 1.8 A resolution of a complex of alpha-bungarotoxin with a high affinity 13-residue peptide that is homologous to the binding region of the alpha subunit of acetylcholine receptor. The peptide fits snugly to the toxin and adopts a beta hairpin conformation. The structures of the bound peptide and the homologous loop of acetylcholine binding protein, a soluble analog of the extracellular domain of acetylcholine receptor, are remarkably similar. Their superposition indicates that the toxin wraps around the receptor binding site loop, and in addition, binds tightly at the interface of two of the receptor subunits where it inserts a finger into the ligand binding site, thus blocking access to the acetylcholine binding site and explaining its strong antagonistic activity.
The binding site of acetylcholine receptor as visualized in the X-Ray structure of a complex between alpha-bungarotoxin and a mimotope peptide.,Harel M, Kasher R, Nicolas A, Guss JM, Balass M, Fridkin M, Smit AB, Brejc K, Sixma TK, Katchalski-Katzir E, Sussman JL, Fuchs S Neuron. 2001 Oct 25;32(2):265-75. PMID:11683996[2]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Chang L, Lin S, Huang H, Hsiao M. Genetic organization of alpha-bungarotoxins from Bungarus multicinctus (Taiwan banded krait): evidence showing that the production of alpha-bungarotoxin isotoxins is not derived from edited mRNAs. Nucleic Acids Res. 1999 Oct 15;27(20):3970-5. PMID:10497260
- ↑ Harel M, Kasher R, Nicolas A, Guss JM, Balass M, Fridkin M, Smit AB, Brejc K, Sixma TK, Katchalski-Katzir E, Sussman JL, Fuchs S. The binding site of acetylcholine receptor as visualized in the X-Ray structure of a complex between alpha-bungarotoxin and a mimotope peptide. Neuron. 2001 Oct 25;32(2):265-75. PMID:11683996
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