Macromolecule Content

• Total Structure Weight: 1575.79 
• Atom Count: 107 
• Residue Count: 16 
• Unique protein chains: 1

1DG2

SOLUTION CONFORMATION OF A-CONOTOXIN AUIB

• DOI: 10.2210/pdb1DG2/pdb

• Classification: TOXIN
• Organism(s): Conus aulicus


• Deposited: 1999-11-23 Released: 2000-02-25 
• Deposition Author(s): Cho, J.-H., Mok, K.H., Olivera, B.M., McIntosh, J.M., Park, K.-H., Han, K.-H.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 50 
• Conformers Submitted: 20 
• Selection Criteria: BACK CALCULATED DATA AGREE WITH EXPERIMENTAL NOESY SPECTRUM,STRUCTURES WITH ACCEPTABLE COVALENT GEOMETRY 

Literature

Nuclear magnetic resonance solution conformation of alpha-conotoxin AuIB, an alpha(3)beta(4) subtype-selective neuronal nicotinic acetylcholine receptor antagonist.

Cho, J.H., Mok, K.H., Olivera, B.M., McIntosh, J.M., Park, K.H., Han, K.H.

(2000) J.Biol.Chem. 275: 8680-8685

• PubMed: 10722709 


• PubMed Abstract: 
  

The neuronal nicotinic acetylcholine receptors constitute a highly diverse group, with subtypes consisting of pentameric combinations of alpha and beta subunits. alpha-Conotoxins are a homologous series of small peptides that antagonize these receptors. We present the three-dimensional solution structure of alpha-conotoxin AuIB, the first 15-residue alpha-conotoxin known to selectively block the alpha(3)beta(4) nicotinic acetylcholine receptor subtype. The pairwise backbone and heavy-atom root mean square deviation for an ensemble of 20 structures are 0.269 and 0.720 A, respectively. The overall fold of alpha-conotoxin AuIB closely resembles that of the alpha4/7 subfamily alpha-conotoxins. However, the absence of Tyr(15), normally present in other alpha4/7 members, results in tight bending of the backbone at the C terminus and effectively renders Asp(14) to assume the spatial location of Tyr(15) present in other neuronal alpha4/7 alpha-conotoxins. Structural comparison of alpha-conotoxin AuIB with the alpha(3)beta(2) subtype-specific alpha-conotoxin MII shows different electrostatic surface charge distributions, which may be important in differential receptor subtype recognition.

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Organizational Affiliation: 

Protein Engineering Laboratory, Korea Research Institute of Bioscience and Biotechnology, Yusong, Taejon 305-600, Republic of Korea.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
A-CONOTOXIN AUIB	A	16	Conus aulicus	Mutation(s): 0
Find proteins for P56640 (Conus aulicus) Go to UniProtKB:  P56640

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
NH2	A	NON-POLYMER	H2 N		--

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 50 
• Conformers Submitted: 20 
• Selection Criteria: BACK CALCULATED DATA AGREE WITH EXPERIMENTAL NOESY SPECTRUM,STRUCTURES WITH ACCEPTABLE COVALENT GEOMETRY 
• Olderado: 1DG2 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1999-11-23 
• Released Date: 2000-02-25 
• Deposition Author(s): Cho, J.-H., Mok, K.H., Olivera, B.M., McIntosh, J.M., Park, K.-H., Han, K.-H.

Revision History 

• Version 1.0: 2000-02-25
  Type: Initial release
• Version 1.1: 2008-04-27
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance