2abx

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(Difference between revisions)

Revision as of 01:46, 11 September 2015

THE CRYSTAL STRUCTURE OF ALPHA-BUNGAROTOXIN AT 2.5 ANGSTROMS RESOLUTION. RELATION TO SOLUTION STRUCTURE AND BINDING TO ACETYLCHOLINE RECEPTOR

Structural highlights

2abx is a 2 chain structure with sequence from Bunmu. This structure supersedes the now removed PDB entry 1abx. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
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

We report collection of 2.5 A resolution X-ray diffraction data from newly grown crystals of the rare 'small unit cell' form of the long snake neurotoxin, alpha-bungarotoxin. The previous model of the molecule has been rebuilt, and refined using least-square methods to a crystallographic residual of 0.24 at 2.5 A resolution. alpha-Bungarotoxin's crystal structure is compared with the crystal structures of two other snake neurotoxins (cobratoxin and erabutoxin), and with its solution structure inferred from spectroscopic studies. Significant differences include less beta-sheet in bungarotoxin's crystal structure than in solution, or in the crystal structures of other neurotoxins, and an unusual orientation in the crystal of the invariant tryptophan. The functional, binding surface of bungarotoxin is described; it consists primarily of hydrophobic and hydrogen-bonding groups and only a few charged side-chains. The structure is compared with experimental binding parameters for neurotoxins.

The crystal structure of alpha-bungarotoxin at 2.5 A resolution: relation to solution structure and binding to acetylcholine receptor.,Love RA, Stroud RM Protein Eng. 1986 Oct-Nov;1(1):37-46. PMID:3507686^[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
↑ Love RA, Stroud RM. The crystal structure of alpha-bungarotoxin at 2.5 A resolution: relation to solution structure and binding to acetylcholine receptor. Protein Eng. 1986 Oct-Nov;1(1):37-46. PMID:3507686

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/2abx"

Categories: Bunmu | Love, R | Stroud, R | Postsynaptic neurotoxin

@@ Line 2: / Line 2: @@
 <StructureSection load='2abx' size='340' side='right' caption='[[2abx]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[2abx]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Bungarus_multicinctus Bungarus multicinctus]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=1abx 1abx]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2ABX OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2ABX FirstGlance]. <br>
+<table><tr><td colspan='2'>[[2abx]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Bunmu Bunmu]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=1abx 1abx]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2ABX OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2ABX FirstGlance]. <br>
-</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=2abx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2abx OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2abx RCSB], [http://www.ebi.ac.uk/pdbsum/2abx PDBsum]</span></td></tr>
+</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=2abx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2abx OCA], [http://pdbe.org/2abx PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2abx RCSB], [http://www.ebi.ac.uk/pdbsum/2abx PDBsum]</span></td></tr>
 </table>
 == Function ==
@@ Line 25: / Line 25: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 2abx" style="background-color:#fffaf0;"></div>
 ==See Also==
@@ Line 32: / Line 33: @@
 __TOC__
 </StructureSection>
-[[Category: Bungarus multicinctus]]
+[[Category: Bunmu]]
 [[Category: Love, R]]
 [[Category: Stroud, R]]
 [[Category: Postsynaptic neurotoxin]]

2abx

From Proteopedia

Revision as of 01:46, 11 September 2015

THE CRYSTAL STRUCTURE OF ALPHA-BUNGAROTOXIN AT 2.5 ANGSTROMS RESOLUTION. RELATION TO SOLUTION STRUCTURE AND BINDING TO ACETYLCHOLINE RECEPTOR

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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