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(-) Description

Title :  SOLUTION STRUCTURE OF OMEGA CONOTOXIN SO3 DETERMINED BY 1H-NMR
 
Authors :  Y. Yan, R. Zhang
Date :  29 Sep 00  (Deposition) - 18 Oct 00  (Release) - 24 Feb 09  (Revision)
Method :  SOLUTION NMR
Resolution :  NOT APPLICABLE
Chains :  NMR Structure  :  A  (11x)
Keywords :  Beta Sheet, Toxin (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  Y. Yan, G. Tu, X. Luo, Q. Dai, P. Huang, R. Zhang
Three-Dimensional Solution Structure Of W-Conotoxin So3 Determined By 1H Nmr
Chin. Sci. Bull. V. 48 1097 2003
PubMed: search
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - OMEGA CONOTOXIN SO3
    Chains: A
    Engineered: YES
    Other Details: THIS PEPTIDE WAS CHEMICALLY SYNTHESIZED. THE SEQUENCE OF THIS PEPTIDE OCCURS NATURALLY IN THE VENOM OF CONUS STRIATUS (STRIATED CONE).
    Synthetic: YES

 Structural Features

(-) Chains, Units

  
NMR Structure (11x): 

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (0, 0)

(no "Ligand,Modified Residues,Ions" information available for 1FYG)

(-) Sites  (0, 0)

(no "Site" information available for 1FYG)

(-) SS Bonds  (3, 3)

NMR Structure
No.Residues
1A:1 -A:16
2A:8 -A:20
3A:15 -A:25

(-) Cis Peptide Bonds  (0, 0)

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

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (1, 1)

NMR Structure (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1OMEGA_CONOTOXINPS60004 Omega-conotoxin family signature.CO13_CONST46-70  1A:1-25

(-) Exons   (0, 0)

(no "Exon" information available for 1FYG)

(-) 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:25
 aligned with CO13_CONST | Q9XZK2 from UniProtKB/Swiss-Prot  Length:71

    Alignment length:25
                                    55        65     
            CO13_CONST   46 CKAAGKPCSRIAYNCCTGSCRSGKC 70
               SCOP domains d1fyga_ A: Conotoxin      SCOP domains
               CATH domains ------------------------- CATH domains
               Pfam domains ------------------------- Pfam domains
         Sec.struct. author ......................... Sec.struct. author
                 SAPs(SNPs) ------------------------- SAPs(SNPs)
                    PROSITE OMEGA_CONOTOXIN           PROSITE
                 Transcript ------------------------- Transcript
                  1fyg A  1 CKAAGKPCSRIAYNCCTGSCRSGKC 25
                                    10        20
   Legend:   → Mismatch (orange background)
  - → Gap (green background, '-', border residues have a numbering label)
    → Modified Residue (blue background, lower-case, 'x' indicates undefined single-letter code, labelled with number + name)
  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 1FYG)

(-) Pfam Domains  (0, 0)

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

(-) Gene Ontology  (4, 4)

NMR Structure(hide GO term definitions)
Chain A   (CO13_CONST | Q9XZK2)
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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