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1ik8

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Revision as of 20:00, 10 September 2015

NMR structure of Alpha-Bungarotoxin

Structural highlights

1ik8 is a 1 chain structure with sequence from Bungarus multicinctus. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	1hn7, 1hoy
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

Function

[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).^[1] ^[2]

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

A combinatorial library approach was used to produce synthetic peptides mimicking the snake neurotoxin binding site of nicotinic receptors. Among the sequences, which inhibited binding of alpha-bungarotoxin to muscle and neuronal nicotinic receptors, HRYYESSLPWYPD, a 14-amino acid peptide with considerably higher toxin-binding affinity than the other synthesized peptides, was selected, and the structure of its complex with the toxin was analyzed by NMR. Comparison of the solution structure of the free toxin and its complex with this peptide indicated that complex formation induced extensive conformational rearrangements mainly at finger II and the carboxy terminus of the protein. The peptidyl residues P10 and Y4 seemed to be critical for peptide folding and complex stability, respectively. The latter residue of the peptide strongly interacted with the protein by entering a small pocket delimited by D30, C33, S34, R36, and V39 toxin side chains.

NMR structure of alpha-bungarotoxin free and bound to a mimotope of the nicotinic acetylcholine receptor.,Scarselli M, Spiga O, Ciutti A, Bernini A, Bracci L, Lelli B, Lozzi L, Calamandrei D, Di Maro D, Klein S, Niccolai N Biochemistry. 2002 Feb 5;41(5):1457-63. PMID:11814338^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Servent D, Winckler-Dietrich V, Hu HY, Kessler P, Drevet P, Bertrand D, Menez A. Only snake curaremimetic toxins with a fifth disulfide bond have high affinity for the neuronal alpha7 nicotinic receptor. J Biol Chem. 1997 Sep 26;272(39):24279-86. PMID:9305882
↑ Dajas-Bailador F, Costa G, Dajas F, Emmett S. Effects of alpha-erabutoxin, alpha-bungarotoxin, alpha-cobratoxin and fasciculin on the nicotine-evoked release of dopamine in the rat striatum in vivo. Neurochem Int. 1998 Oct;33(4):307-12. PMID:9840221
↑ Scarselli M, Spiga O, Ciutti A, Bernini A, Bracci L, Lelli B, Lozzi L, Calamandrei D, Di Maro D, Klein S, Niccolai N. NMR structure of alpha-bungarotoxin free and bound to a mimotope of the nicotinic acetylcholine receptor. Biochemistry. 2002 Feb 5;41(5):1457-63. PMID:11814338

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1ik8"

@@ Line 4: / Line 4: @@
 <table><tr><td colspan='2'>[[1ik8]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Bungarus_multicinctus Bungarus multicinctus]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1IK8 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1IK8 FirstGlance]. <br>
 </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1hn7|1hn7]], [[1hoy|1hoy]]</td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1ik8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ik8 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1ik8 RCSB], [http://www.ebi.ac.uk/pdbsum/1ik8 PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1ik8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ik8 OCA], [http://pdbe.org/1ik8 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1ik8 RCSB], [http://www.ebi.ac.uk/pdbsum/1ik8 PDBsum]</span></td></tr>
 </table>
 == Function ==
@@ Line 26: / Line 26: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 1ik8" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Bungarotoxin|Bungarotoxin]]
 == References ==
 <references/>

1ik8

From Proteopedia

Revision as of 20:00, 10 September 2015

NMR structure of Alpha-Bungarotoxin

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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