4jra

From Proteopedia

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Revision as of 21:47, 5 August 2016

CRYSTAL STRUCTURE OF THE BOTULINUM NEUROTOXIN A RECEPTOR-BINDING DOMAIN IN COMPLEX WITH THE LUMINAL DOMAIN Of SV2C

Structural highlights

4jra is a 4 chain structure with sequence from "bacillus_botulinus"_van_ermengem_1896 "bacillus botulinus" van ermengem 1896 and Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Gene:	botA, atx, bna ("Bacillus botulinus" van Ermengem 1896), SV2C, KIAA1054 (HUMAN)
Activity:	Bontoxilysin, with EC number 3.4.24.69
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[BXA1_CLOBO] Inhibits acetylcholine release. The botulinum toxin binds with high affinity to peripheral neuronal presynaptic membrane to the secretory vesicle protein SV2. It binds directly to the largest luminal loop of SV2A, SV2B and SV2C. It is then internalized by receptor-mediated endocytosis. The C-terminus of the heavy chain (H) is responsible for the adherence of the toxin to the cell surface while the N-terminus mediates transport of the light chain from the endocytic vesicle to the cytosol. After translocation, the light chain (L) hydrolyzes the 197-Gln-|-Arg-198 bond in SNAP-25, thereby blocking neurotransmitter release. Inhibition of acetylcholine release results in flaccid paralysis, with frequent heart or respiratory failure. [SV2C_HUMAN] Plays a role in the control of regulated secretion in neural and endocrine cells, enhancing selectively low-frequency neurotransmission. Positively regulates vesicle fusion by maintaining the readily releasable pool of secretory vesicles (By similarity).

Publication Abstract from PubMed

Botulinum neurotoxin A (BoNT/A) belongs to the most dangerous class of bioweapons. Despite this, BoNT/A is used to treat a wide range of common medical conditions such as migraines and a variety of ocular motility and movement disorders. BoNT/A is probably best known for its use as an antiwrinkle agent in cosmetic applications (including Botox and Dysport). BoNT/A application causes long-lasting flaccid paralysis of muscles through inhibiting the release of the neurotransmitter acetylcholine by cleaving synaptosomal-associated protein 25 (SNAP-25) within presynaptic nerve terminals. Two types of BoNT/A receptor have been identified, both of which are required for BoNT/A toxicity and are therefore likely to cooperate with each other: gangliosides and members of the synaptic vesicle glycoprotein 2 (SV2) family, which are putative transporter proteins that are predicted to have 12 transmembrane domains, associate with the receptor-binding domain of the toxin. Recently, fibroblast growth factor receptor 3 (FGFR3) has also been reported to be a potential BoNT/A receptor. In SV2 proteins, the BoNT/A-binding site has been mapped to the luminal domain, but the molecular details of the interaction between BoNT/A and SV2 are unknown. Here we determined the high-resolution crystal structure of the BoNT/A receptor-binding domain (BoNT/A-RBD) in complex with the SV2C luminal domain (SV2C-LD). SV2C-LD consists of a right-handed, quadrilateral beta-helix that associates with BoNT/A-RBD mainly through backbone-to-backbone interactions at open beta-strand edges, in a manner that resembles the inter-strand interactions in amyloid structures. Competition experiments identified a peptide that inhibits the formation of the complex. Our findings provide a strong platform for the development of novel antitoxin agents and for the rational design of BoNT/A variants with improved therapeutic properties.

Structural basis for recognition of synaptic vesicle protein 2C by botulinum neurotoxin A.,Benoit RM, Frey D, Hilbert M, Kevenaar JT, Wieser MM, Stirnimann CU, McMillan D, Ceska T, Lebon F, Jaussi R, Steinmetz MO, Schertler GF, Hoogenraad CC, Capitani G, Kammerer RA Nature. 2013 Nov 17. doi: 10.1038/nature12732. PMID:24240280^[1]

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

References

↑ Benoit RM, Frey D, Hilbert M, Kevenaar JT, Wieser MM, Stirnimann CU, McMillan D, Ceska T, Lebon F, Jaussi R, Steinmetz MO, Schertler GF, Hoogenraad CC, Capitani G, Kammerer RA. Structural basis for recognition of synaptic vesicle protein 2C by botulinum neurotoxin A. Nature. 2013 Nov 17. doi: 10.1038/nature12732. PMID:24240280 doi:http://dx.doi.org/10.1038/nature12732

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/4jra"

@@ Line 1: / Line 1: @@
 ==CRYSTAL STRUCTURE OF THE BOTULINUM NEUROTOXIN A RECEPTOR-BINDING DOMAIN IN COMPLEX WITH THE LUMINAL DOMAIN Of SV2C==
 <StructureSection load='4jra' size='340' side='right' caption='[[4jra]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
@@ Line 6: / Line 7: @@
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">botA, atx, bna ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1491 "Bacillus botulinus" van Ermengem 1896]), SV2C, KIAA1054 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Bontoxilysin Bontoxilysin], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.24.69 3.4.24.69] </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=4jra FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4jra OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4jra RCSB], [http://www.ebi.ac.uk/pdbsum/4jra 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=4jra FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4jra OCA], [http://pdbe.org/4jra PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4jra RCSB], [http://www.ebi.ac.uk/pdbsum/4jra PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4jra ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 18: / Line 19: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 4jra" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Botulinum neurotoxin|Botulinum neurotoxin]]
 == References ==
 <references/>

4jra

From Proteopedia

Revision as of 21:47, 5 August 2016

CRYSTAL STRUCTURE OF THE BOTULINUM NEUROTOXIN A RECEPTOR-BINDING DOMAIN IN COMPLEX WITH THE LUMINAL DOMAIN Of SV2C

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

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