1mxn
From Proteopedia
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|PDB= 1mxn |SIZE=350|CAPTION= <scene name='initialview01'>1mxn</scene> | |PDB= 1mxn |SIZE=350|CAPTION= <scene name='initialview01'>1mxn</scene> | ||
|SITE= | |SITE= | ||
| - | |LIGAND= <scene name='pdbligand=NH2:AMINO GROUP'>NH2</scene> | + | |LIGAND= <scene name='pdbligand=NH2:AMINO+GROUP'>NH2</scene> |
|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY=[[1mxp|1MXP]] | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1mxn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1mxn OCA], [http://www.ebi.ac.uk/pdbsum/1mxn PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1mxn RCSB]</span> | ||
}} | }} | ||
| Line 27: | Line 30: | ||
[[Category: Dutton, J L.]] | [[Category: Dutton, J L.]] | ||
[[Category: Hogg, R C.]] | [[Category: Hogg, R C.]] | ||
| - | [[Category: NH2]] | ||
[[Category: alpha helix]] | [[Category: alpha helix]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 22:22:36 2008'' |
Revision as of 19:22, 30 March 2008
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| Ligands: | |||||||
| Related: | 1MXP
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| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Solution structure of alpha-conotoxin AuIB
Overview
alpha-Conotoxin AuIB and a disulfide bond variant of AuIB have been synthesized to determine the role of disulfide bond connectivity on structure and activity. Both of these peptides contain the 15 amino acid sequence GCCSYPPCFATNPDC, with the globular (native) isomer having the disulfide connectivity Cys(2-8 and 3-15) and the ribbon isomer having the disulfide connectivity Cys(2-15 and 3-8). The solution structures of the peptides were determined by NMR spectroscopy, and their ability to block the nicotinic acetylcholine receptors on dissociated neurons of the rat parasympathetic ganglia was examined. The ribbon disulfide isomer, although having a less well defined structure, is surprisingly found to have approximately 10 times greater potency than the native peptide. To our knowledge this is the first demonstration of a non-native disulfide bond isomer of a conotoxin exhibiting greater biological activity than the native isomer.
About this Structure
1MXN is a Single protein structure of sequence from [1]. Full crystallographic information is available from OCA.
Reference
A new level of conotoxin diversity, a non-native disulfide bond connectivity in alpha-conotoxin AuIB reduces structural definition but increases biological activity., Dutton JL, Bansal PS, Hogg RC, Adams DJ, Alewood PF, Craik DJ, J Biol Chem. 2002 Dec 13;277(50):48849-57. Epub 2002 Oct 9. PMID:12376538
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