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(-) Description

Title :  OMEGA-CONOTOXIN GVIA, A N-TYPE CALCIUM CHANNEL BLOCKER
 
Authors :  J. Mould, T. Yasuda, C. I. Schroeder, A. M. Beedle, C. J. Doering, G. W. Za D. J. Adams, R. J. Lewis
Date :  23 Jun 04  (Deposition) - 13 Jul 04  (Release) - 17 Sep 14  (Revision)
Method :  SOLUTION NMR
Resolution :  NOT APPLICABLE
Chains :  NMR Structure  :  A  (20x)
NMR Structure *:  A  (1x)
Keywords :  Disulfide Rich, Four Loop Framework, Amidated C-Terminal, Toxin (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  J. Mould, T. Yasuda, C. I. Schroeder, A. M. Beedle, C. J. Doering, G. W. Zamponi, D. J. Adams, R. J. Lewis
The Alpha2Delta Auxiliary Subunit Reduces Affinity Of Omega-Conotoxins For Recombinant N-Type (Cav2. 2) Calcium Channels
J. Biol. Chem. V. 279 34705 2004
PubMed-ID: 15166237  |  Reference-DOI: 10.1074/JBC.M310848200

(-) Compounds

Molecule 1 - OMEGA-CONOTOXIN GVIA
    Chains: A
    Fragment: GVIC
    Organism Common: GEOGRAPHY CONE
    Organism Scientific: CONUS GEOGRAPHUS
    Organism Taxid: 6491
    Secretion: VENOM

 Structural Features

(-) Chains, Units

  1
NMR Structure (20x): A
NMR Structure * (1x): A

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (2, 4)

NMR Structure (2, 4)
No.NameCountTypeFull Name
1HYP3Mod. Amino Acid4-HYDROXYPROLINE
2NH21Mod. Amino AcidAMINO GROUP
NMR Structure * (2, 4)
No.NameCountTypeFull Name
1HYP3Mod. Amino Acid4-HYDROXYPROLINE
2NH21Mod. Amino AcidAMINO GROUP

(-) Sites  (1, 1)

NMR Structure (1, 1)
No.NameEvidenceResiduesDescription
1AC1SOFTWARESER A:3 , TYR A:27BINDING SITE FOR RESIDUE NH2 A 28

(-) SS Bonds  (3, 3)

NMR Structure
No.Residues
1A:1 -A:16
2A:8 -A:19
3A:15 -A:26

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 1TTL)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (1, 1)

NMR Structure (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1OMEGA_CONOTOXINPS60004 Omega-conotoxin family signature.CO16A_CONGE46-71  1A:1-26
NMR Structure * (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1OMEGA_CONOTOXINPS60004 Omega-conotoxin family signature.CO16A_CONGE46-71  1A:1-26

(-) Exons   (0, 0)

(no "Exon" information available for 1TTL)

(-) 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:28
 aligned with CO16A_CONGE | P01522 from UniProtKB/Swiss-Prot  Length:73

    Alignment length:28
                                    55        65        
           CO16A_CONGE   46 CKSPGSSCSPTSYNCCRSCNPYTKRCYG 73
               SCOP domains d1ttla_ A: Conotoxin         SCOP domains
               CATH domains ---------------------------- CATH domains
               Pfam domains Conotoxin-1ttlA01 A:1-27   - Pfam domains
         Sec.struct. author ..................ee....ee.. Sec.struct. author
                 SAPs(SNPs) ---------------------------- SAPs(SNPs)
                    PROSITE OMEGA_CONOTOXIN           -- PROSITE
                 Transcript ---------------------------- Transcript
                  1ttl A  1 CKSpGSSCSpTSYNCCRSCNpYTKRCYx 28
                               |    10        20|      |
                               |     |         21-HYP 28-NH2
                               4-HYP |                  
                                    10-HYP
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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  (1, 1)

NMR Structure
(-)
Class: Small proteins (3458)

(-) CATH Domains  (0, 0)

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

(-) Pfam Domains  (1, 1)

NMR Structure
(-)
Clan: Omega_toxin (34)

(-) Gene Ontology  (4, 4)

NMR Structure(hide GO term definitions)
Chain A   (CO16A_CONGE | P01522)
molecular function
    GO:0008200    ion channel inhibitor activity    Stops, prevents, or reduces the activity of an ion channel.
biological process
    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:0072556    other organism presynaptic membrane    A presynaptic membrane that is part of another organism, i.e. a secondary organism with which the first organism is interacting. A presynaptic membrane is specialized area of membrane of the axon terminal that faces the plasma membrane of the neuron or muscle fiber with which the axon terminal establishes a synaptic junction; many synaptic junctions exhibit structural presynaptic characteristics, such as conical, electron-dense internal protrusions, that distinguish it from the remainder of the axon plasma membrane.

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 Related Entries

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

UniProtKB/Swiss-Prot
        CO16A_CONGE | P01522: 1omc 1tr6 2cco

(-) Related Entries Specified in the PDB File

1omc SOLUTION STRUCTURE OF OMEGA-CONOTOXIN GVIA USING 2-D NMR SPECTROSCOPY AND RELAXATION MATRIX ANALYSIS.
2cco STRUCTURE OF THE CALCIUM CHANNEL BLOCKER CONOTOXIN GVIA, NMR, 20 STRUCTURES