6ebx: Difference between revisions

Latest revision as of 09:52, 23 October 2024

STRUCTURE DETERMINATION OF A DIMERIC FORM OF ERABUTOXIN B, CRYSTALLIZED FROM THIOCYANATE SOLUTION

Structural highlights

6ebx is a 2 chain structure with sequence from Laticauda semifasciata. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 1.7Å
Ligands:	SCN
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

3S1EB_LATSE Binds with high affinity to muscular nicotinic acetylcholine receptors (nAChRs) (tested on Torpedo marmorata, Kd=0.07 nM), and with low affinity to neuronal alpha-7/CHRNA7 nAChRs (tested on chimeric alpha-7/CHRNA7, Kd=22 uM) and inhibit acetylcholine from binding to the receptor, thereby impairing neuromuscular transmission (PubMed:7721859). Produces peripheral paralysis by blocking neuromuscular transmission at the postsynaptic site.^[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

Erabutoxin-b, M(r) = 6861.1, a single 62 amino-acid chain folded by four disulfide bridges, was crystallized in a new orthorhombic form by using thiocyanate as crystallizing agent. The space group is P2(1)2(1)2(1) with a = 53.36 (4), b = 40.89 (4), c = 55.71 (5) A, V = 121533.1 A and Z = 8. X-ray diffraction data were recorded at the LURE synchrotron facility (lambda = 1.405 A). The structure was solved by molecular replacement and shows a dimeric association through an anti-parallel beta-sheet around the twofold non-crystallographic axis. The two independent molecules, one SCN- ion and 97 associated water molecules were refined by molecular dynamics and annealing techniques to R = 19.6% (10,913 Fobs, resolution 5-1.7 A). The thiocyanate ion is located at the interface of the dimer and close to the non-crystallographic twofold axis.

Structure determination of a dimeric form of erabutoxin-b, crystallized from a thiocyanate solution.,Saludjian P, Prange T, Navaza J, Menez R, Guilloteau JP, Ries-Kautt M, Ducruix A Acta Crystallogr B. 1992 Aug 1;48 ( Pt 4):520-31. PMID:1418823^[2]

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
↑ Saludjian P, Prange T, Navaza J, Menez R, Guilloteau JP, Ries-Kautt M, Ducruix A. Structure determination of a dimeric form of erabutoxin-b, crystallized from a thiocyanate solution. Acta Crystallogr B. 1992 Aug 1;48 ( Pt 4):520-31. PMID:1418823

Proteopedia Page Contributors and Editors (what is this?)

OCA

[1] 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

[2] Saludjian P, Prange T, Navaza J, Menez R, Guilloteau JP, Ries-Kautt M, Ducruix A. Structure determination of a dimeric form of erabutoxin-b, crystallized from a thiocyanate solution. Acta Crystallogr B. 1992 Aug 1;48 ( Pt 4):520-31. PMID:1418823

[1]

[2]

@@ Line 3: / Line 3: @@
 <StructureSection load='6ebx' size='340' side='right'caption='[[6ebx]], [[Resolution|resolution]] 1.70&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[6ebx]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Black-banded_sea_krait Black-banded sea krait]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6EBX OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=6EBX FirstGlance]. <br>
+<table><tr><td colspan='2'>[[6ebx]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Laticauda_semifasciata Laticauda semifasciata]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6EBX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6EBX FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SCN:THIOCYANATE+ION'>SCN</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]] 1.7&#8491;</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=6ebx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6ebx OCA], [http://pdbe.org/6ebx PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6ebx RCSB], [http://www.ebi.ac.uk/pdbsum/6ebx PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6ebx ProSAT]</span></td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SCN:THIOCYANATE+ION'>SCN</scene></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=6ebx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6ebx OCA], [https://pdbe.org/6ebx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6ebx RCSB], [https://www.ebi.ac.uk/pdbsum/6ebx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6ebx ProSAT]</span></td></tr>
 </table>
 == Function ==
-[[http://www.uniprot.org/uniprot/NXSB_PSSEM NXSB_PSSEM]] Binds with high affinity to muscular nicotinic acetylcholine receptors (nAChRs), and with low affinity to neuronal alpha-7 nAChRs and inhibit acetylcholine from binding to the receptor, thereby impairing neuromuscular transmission. Produces peripheral paralysis by blocking neuromuscular transmission at the postsynaptic site.<ref>PMID:9305882</ref>
+[https://www.uniprot.org/uniprot/3S1EB_LATSE 3S1EB_LATSE] Binds with high affinity to muscular nicotinic acetylcholine receptors (nAChRs) (tested on Torpedo marmorata, Kd=0.07 nM), and with low affinity to neuronal alpha-7/CHRNA7 nAChRs (tested on chimeric alpha-7/CHRNA7, Kd=22 uM) and inhibit acetylcholine from binding to the receptor, thereby impairing neuromuscular transmission (PubMed:7721859). Produces peripheral paralysis by blocking neuromuscular transmission at the postsynaptic site.<ref>PMID:9305882</ref>
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]
@@ Line 14: / Line 15: @@
    <jmolCheckbox>
      <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/eb/6ebx_consurf.spt"</scriptWhenChecked>
-     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
+     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
      <text>to colour the structure by Evolutionary Conservation</text>
    </jmolCheckbox>
@@ Line 32: / Line 33: @@
 __TOC__
 </StructureSection>
-[[Category: Black-banded sea krait]]
 [[Category: Large Structures]]
-[[Category: Prange, T]]
+[[Category: Laticauda semifasciata]]
-[[Category: Saludjian, P]]
+[[Category: Prange T]]
-[[Category: Toxin]]
+[[Category: Saludjian P]]

6ebx: Difference between revisions

Latest revision as of 09:52, 23 October 2024

STRUCTURE DETERMINATION OF A DIMERIC FORM OF ERABUTOXIN B, CRYSTALLIZED FROM THIOCYANATE SOLUTION

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

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