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(-) Description

Title :  THREE-DIMENSIONAL STRUCTURE OF ALPHA-CONOTOXIN MII, NMR, 14 STRUCTURES
 
Authors :  K. J. Shon, S. C. Koerber, J. E. Rivier, B. M. Olivera, J. M. Mcintosh
Date :  15 Sep 97  (Deposition) - 09 Dec 98  (Release) - 24 Feb 09  (Revision)
Method :  SOLUTION NMR
Resolution :  NOT APPLICABLE
Chains :  NMR Structure  :  A  (14x)
Keywords :  Neurotoxin, Neuronal Nicotinic Acetylcholine Receptor Inhibitor, Subtype Specific Ligand, Presynaptic Nicotinic Acetylcholine Receptor Blocker, Cholinergic Modulation, Dopamine Release (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  G. E. Cartier, D. Yoshikami, W. R. Gray, S. Luo, B. M. Olivera, J. M. Mcintosh
A New Alpha-Conotoxin Which Targets Alpha3Beta2 Nicotinic Acetylcholine Receptors.
J. Biol. Chem. V. 271 7522 1996
PubMed-ID: 8631783  |  Reference-DOI: 10.1074/JBC.271.13.7522
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - ALPHA-CONOTOXIN MII
    Chains: A
    Engineered: YES
    Organism Common: MAGUS CONE
    Organism Scientific: CONUS MAGUS
    Organism Taxid: 6492

 Structural Features

(-) Chains, Units

  
NMR Structure (14x): 

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (1, 1)

NMR Structure (1, 1)
No.NameCountTypeFull Name
1NH21Mod. Amino AcidAMINO GROUP

(-) Sites  (0, 0)

(no "Site" information available for 1M2C)

(-) SS Bonds  (2, 2)

NMR Structure
No.Residues
1A:2 -A:8
2A:3 -A:16

(-) Cis Peptide Bonds  (1, 6)

NMR Structure
No.ModelResidues
11, 4, 5, 10, 11, 13Gly A:1 -Cys A:2

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 1M2C)

(-) PROSITE Motifs  (1, 1)

NMR Structure (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1ALPHA_CONOTOXINPS60014 Alpha-conotoxin family signature.CA2_CONMA50-64  1A:2-16

(-) Exons   (0, 0)

(no "Exon" information available for 1M2C)

(-) Sequences/Alignments

NMR Structure
   Reformat: Number of residues per line =  ('0' or empty: single-line sequence representation)
  Number of residues per labelling interval =   
  UniProt sequence: complete  aligned part    
   Show mapping: SCOP domains CATH domains Pfam domains Secondary structure (by author)
SAPs(SNPs) PROSITE motifs Exons
(details for a mapped element are shown in a popup box when the mouse pointer rests over it) 
Chain A from PDB  Type:PROTEIN  Length:17
 aligned with CA2_CONMA | P56636 from UniProtKB/Swiss-Prot  Length:68

    Alignment length:17
                                    58       
            CA2_CONMA    49 GCCSNPVCHLEHSNLCG  65
               SCOP domains ----------------- SCOP domains
               CATH domains ----------------- CATH domains
               Pfam domains Toxin_8-1m2cA01 - Pfam domains
         Sec.struct. author .......hhhh...... Sec.struct. author
                 SAPs(SNPs) ----------------- SAPs(SNPs)
                    PROSITE -ALPHA_CONOTOXIN- PROSITE
                 Transcript ----------------- Transcript
                 1m2c A   1 GCCSNPVCHLEHSNLCx 17H
                                    10      |
                                          17H-NH2
   Legend:   → Mismatch (orange background)
  - → Gap (green background, '-', border residues have a numbering label)
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  x → Chemical Group (purple background, 'x', labelled with number + name, e.g. ACE or NH2)
  extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '|'

 Classification and Annotation

(-) SCOP Domains  (0, 0)

(no "SCOP Domain" information available for 1M2C)

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 1M2C)

(-) Pfam Domains  (1, 1)

NMR Structure
(-)
Clan: no clan defined [family: Toxin_8] (6)

(-) Gene Ontology  (5, 5)

NMR Structure(hide GO term definitions)
Chain A   (CA2_CONMA | P56636)
molecular function
    GO:0030550    acetylcholine receptor inhibitor activity    Interacting (directly or indirectly) with acetylcholine receptors such that the proportion of receptors in the active form is decreased.
biological process
    GO:2000272    negative regulation of receptor activity    Any process that stops, prevents or reduces the frequency, rate or extent of receptor activity.
    GO:0009405    pathogenesis    The set of specific processes that generate the ability of an organism to induce an abnormal, generally detrimental state in another organism.
cellular component
    GO:0005576    extracellular region    The space external to the outermost structure of a cell. For cells without external protective or external encapsulating structures this refers to space outside of the plasma membrane. This term covers the host cell environment outside an intracellular parasite.
    GO:0035792    other organism postsynaptic membrane    A postsynaptic membrane that is part of another organism, i.e. a secondary organism with which the first organism is interacting. A postsynaptic membrane is a specialized area of membrane facing the presynaptic membrane on the tip of the nerve ending and separated from it by a minute cleft (the synaptic cleft). Neurotransmitters transmit the signal across the synaptic cleft to the postsynaptic membrane.

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 Related Entries

(-) Entries Sharing at Least One Protein Chain (UniProt ID)

UniProtKB/Swiss-Prot
        CA2_CONMA | P56636: 1mii 2ajw 2ak0

(-) Related Entries Specified in the PDB File

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