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(-) Description

Title :  SOLUTION STRUCTURE OF APETX1, A SPECIFIC PEPTIDE INHIBITOR OF HUMAN ETHER-A-GO-GO-RELATED GENE POTASSIUM CHANNELS FROM THE VENOM OF THE SEA ANEMONE ANTHOPLEURA ELEGANTISSIMA: A NEW FOLD FOR AN HERG TOXIN
 
Authors :  B. Chagot, S. Diochot, C. Pimentel, M. Lazdunski, H. Darbon
Date :  30 Sep 04  (Deposition) - 08 Mar 05  (Release) - 24 Feb 09  (Revision)
Method :  SOLUTION NMR
Resolution :  NOT APPLICABLE
Chains :  NMR Structure  :  A  (25x)
Keywords :  Anthopleura Elegantissima, Nmr, Sea Anemone Toxin, Structure Determination, Potassium Channel Inhibitor, Apetx1, Herg (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  B. Chagot, S. Diochot, C. Pimentel, M. Lazdunski, H. Darbon
Solution Structure Of Apetx1 From The Sea Anemone Anthopleura Elegantissima: A New Fold For An Herg Toxin
Proteins V. 59 380 2005
PubMed-ID: 15726634  |  Reference-DOI: 10.1002/PROT.20425
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - TOXIN APETX1
    Chains: A
    Organism Common: CLONAL ANEMONE
    Organism Scientific: ANTHOPLEURA ELEGANTISSIMA
    Organism Taxid: 6110

 Structural Features

(-) Chains, Units

  
NMR Structure (25x): 

Summary Information (see also Sequences/Alignments below)

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

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

(-) Sites  (0, 0)

(no "Site" information available for 1WQK)

(-) SS Bonds  (3, 3)

NMR Structure
No.Residues
1A:4 -A:37
2A:6 -A:30
3A:20 -A:38

(-) Cis Peptide Bonds  (1, 25)

NMR Structure
No.ModelResidues
11, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25Tyr A:39 -Pro A:40

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 1WQK)

(-) Exons   (0, 0)

(no "Exon" information available for 1WQK)

(-) 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:42
 aligned with BDS1_ANTEL | P61541 from UniProtKB/Swiss-Prot  Length:42

    Alignment length:42
                                    10        20        30        40  
            BDS1_ANTEL    1 GTTCYCGKTIGIYWFGTKTCPSNRGYTGSCGYFLGICCYPVD 42
               SCOP domains ------------------------------------------ SCOP domains
               CATH domains 1wqkA00 A:1-42 Anthopleurin-A              CATH domains
               Pfam domains ------------------------------------------ Pfam domains
         Sec.struct. author ..eeee..eeeeeee............eeeee..eeeee... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------ SAPs(SNPs)
                    PROSITE ------------------------------------------ PROSITE
                 Transcript ------------------------------------------ Transcript
                  1wqk A  1 GTTCYCGKTIGIYWFGTKTCPSNRGYTGSCGYFLGICCYPVD 42
                                    10        20        30        40
   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 1WQK)

(-) CATH Domains  (1, 1)

NMR Structure
(-)
Class: Mainly Beta (13760)

(-) Pfam Domains  (0, 0)

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

(-) Gene Ontology  (4, 4)

NMR Structure(hide GO term definitions)
Chain A   (BDS1_ANTEL | P61541)
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:0042151    nematocyst    An organelle found in cnidoblast (nematoblast) cells. When matured, these stinging organelles store toxins and can deliver them when the cnidocil (a short extension of the cnidocyst) is stimulated by a prey or another stimulus.

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  Cis Peptide Bonds
    Tyr A:39 - Pro A:40   [ RasMol ]  
 

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