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(-) Description

Title :  SOLUTION STRUCTURE OF OMEGA-CONOTOXIN MVIIC, A HIGH AFFINITY OF P-TYPE CALCIUM CHANNELS, USING 1H NMR SPECTROSCOPY AND COMPLETE RELAXATION MATRIX ANALYSIS
 
Authors :  S. Farr-Jones, V. J. Basus
Date :  20 Dec 94  (Deposition) - 01 Dec 95  (Release) - 24 Feb 09  (Revision)
Method :  SOLUTION NMR
Resolution :  NOT APPLICABLE
Chains :  NMR Structure  :  A  (15x)
Keywords :  P-Type Calcium Channel Blocker, Conus Venom, Presynaptic Neurotoxin, Conotoxin (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  S. Farr-Jones, G. P. Miljanich, L. Nadasdi, J. Ramachandran, V. J. Basus
Solution Structure Of Omega-Conotoxin Mviic, A High Affinity Ligand Of P-Type Calcium Channels, Using 1H Nmr Spectroscopy And Complete Relaxation Matrix Analysis.
J. Mol. Biol. V. 248 106 1995
PubMed-ID: 7731037  |  Reference-DOI: 10.1006/JMBI.1995.0205
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - OMEGA-CONOTOXIN M VII C (M SEVEN C)
    Chains: A
    Organ: VENOM DUCT
    Organism Common: MAGUS CONE
    Organism Scientific: CONUS MAGUS
    Organism Taxid: 6492
    Synonym: SNX-230

 Structural Features

(-) Chains, Units

  
NMR Structure (15x): 

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  (1, 1)

NMR Structure (1, 1)
No.NameEvidenceResiduesDescription
1AC1SOFTWARECYS A:15 , SER A:19 , LYS A:25 , CYS A:26BINDING SITE FOR RESIDUE NH2 A 27

(-) SS Bonds  (3, 3)

NMR Structure
No.Residues
1A:1 -A:16
2A:8 -A:20
3A:15 -A:26

(-) Cis Peptide Bonds  (0, 0)

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

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (1, 1)

NMR Structure (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1OMEGA_CONOTOXINPS60004 Omega-conotoxin family signature.CO7C_CONMA3-28  1A:1-26

(-) Exons   (0, 0)

(no "Exon" information available for 1OMN)

(-) 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:27
 aligned with CO7C_CONMA | P37300 from UniProtKB/Swiss-Prot  Length:29

    Alignment length:27
                                    12        22       
            CO7C_CONMA    3 CKGKGAPCRKTMYDCCSGSCGRRGKCG 29
               SCOP domains d1omna_ A: Conotoxin        SCOP domains
               CATH domains --------------------------- CATH domains
               Pfam domains --------------------------- Pfam domains
         Sec.struct. author .....eee.hhh......eee..eee. Sec.struct. author
                 SAPs(SNPs) --------------------------- SAPs(SNPs)
                    PROSITE OMEGA_CONOTOXIN           - PROSITE
                 Transcript --------------------------- Transcript
                  1omn A  1 CKGKGAPCRKTMYDCCSGSCGRRGKCx 27
                                    10        20      |
                                                     27-NH2
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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 1OMN)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 1OMN)

(-) Gene Ontology  (4, 4)

NMR Structure(hide GO term definitions)
Chain A   (CO7C_CONMA | P37300)
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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  1omn
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 Related Entries

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

UniProtKB/Swiss-Prot
        CO7C_CONMA | P37300: 1cnn 1v4q

(-) Related Entries Specified in the PDB File

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