2cco
From Proteopedia
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| - | [[Image:2cco.gif|left|200px]] | + | [[Image:2cco.gif|left|200px]] |
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| - | '''STRUCTURE OF THE CALCIUM CHANNEL BLOCKER OMEGA CONOTOXIN GVIA, NMR, 20 STRUCTURES''' | + | {{Structure |
| + | |PDB= 2cco |SIZE=350|CAPTION= <scene name='initialview01'>2cco</scene> | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=NH2:AMINO GROUP'>NH2</scene> | ||
| + | |ACTIVITY= | ||
| + | |GENE= | ||
| + | }} | ||
| + | |||
| + | '''STRUCTURE OF THE CALCIUM CHANNEL BLOCKER OMEGA CONOTOXIN GVIA, NMR, 20 STRUCTURES''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 2CCO is a [ | + | 2CCO is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Conus_geographus Conus geographus]. This structure supersedes the now removed PDB entry 1CCO. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2CCO OCA]. |
==Reference== | ==Reference== | ||
| - | Refined solution structure of omega-conotoxin GVIA: implications for calcium channel binding., Pallaghy PK, Norton RS, J Pept Res. 1999 Mar;53(3):343-51. PMID:[http:// | + | Refined solution structure of omega-conotoxin GVIA: implications for calcium channel binding., Pallaghy PK, Norton RS, J Pept Res. 1999 Mar;53(3):343-51. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/10231724 10231724] |
[[Category: Conus geographus]] | [[Category: Conus geographus]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
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[[Category: toxin]] | [[Category: toxin]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 16:13:45 2008'' |
Revision as of 14:13, 20 March 2008
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STRUCTURE OF THE CALCIUM CHANNEL BLOCKER OMEGA CONOTOXIN GVIA, NMR, 20 STRUCTURES
Overview
The polypeptide omega-conotoxin GVIA (GVIA) is an N-type calcium channel blocker from the venom of Conus geographus, a fish-hunting cone shell. Here we describe a high-resolution solution structure of this member of the 'inhibitor cystine knot' protein family. The structure, based on NMR data acquired at 600 MHz, has mean pairwise RMS differences of 0.25 +/- 0.06 and 1.07 +/- 0.14 A over the backbone heavy atoms and all heavy atoms, respectively. The solvent-accessible side chains are better defined than in previously published structures and provide an improved basis for docking GVIA with models of the calcium channel. Moreover, some side chain interactions important in GVIA folding in vitro and in stabilizing the native structure are defined clearly in the refined structure. Two qualitatively different backbone conformations in the segment from Thr11 to Asn14 persisted in the restrained simulated annealing calculations until a small number of lower bound constraints was included to prevent close contacts from occurring that did not correspond with peaks in the NOESY spectrum. It is possible that GVIA is genuinely flexible at this segment, spending a finite time in the alternative conformation, and this may influence its interaction with the calcium channel.
About this Structure
2CCO is a Single protein structure of sequence from Conus geographus. This structure supersedes the now removed PDB entry 1CCO. Full crystallographic information is available from OCA.
Reference
Refined solution structure of omega-conotoxin GVIA: implications for calcium channel binding., Pallaghy PK, Norton RS, J Pept Res. 1999 Mar;53(3):343-51. PMID:10231724
Page seeded by OCA on Thu Mar 20 16:13:45 2008
