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(-) Description

Title :  SOLUTION STRUCTURE OF A TOXIN FROM THE TARANTULA, GRAMMOSTOLA SPATULATA, WHICH INHIBITS MECHANOSENSITIVE ION CHANNELS
 
Authors :  R. E. Oswald, T. M. Suchyna, R. Mcfeeters, P. Gottlieb, F. Sachs
Date :  08 Jul 04  (Deposition) - 13 Jul 04  (Release) - 24 Feb 09  (Revision)
Method :  SOLUTION NMR
Resolution :  NOT APPLICABLE
Chains :  NMR Structure  :  A  (20x)
Keywords :  Inhibitor, Cysteine Knot, Beta-Sheet, Toxin (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  R. E. Oswald, T. M. Suchyna, R. Mcfeeters, P. Gottlieb, F. Sachs
Solution Structure Of Peptide Toxins That Block Mechanosensitive Ion Channels
J. Biol. Chem. V. 277 34443 2002
PubMed-ID: 12082099  |  Reference-DOI: 10.1074/JBC.M202715200
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - TOXIN GSMTX-4
    Chains: A
    Organism Scientific: GRAMMOSTOLA ROSEA
    Organism Taxid: 432528
    Other Details: VENOM
    Synonym: MTX4

 Structural Features

(-) Chains, Units

  
NMR Structure (20x): 

Summary Information (see also Sequences/Alignments below)

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

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

(-) Sites  (0, 0)

(no "Site" information available for 1TYK)

(-) SS Bonds  (3, 3)

NMR Structure
No.Residues
1A:2 -A:17
2A:9 -A:23
3A:16 -A:30

(-) Cis Peptide Bonds  (0, 0)

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

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (0, 0)

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

(-) Exons   (0, 0)

(no "Exon" information available for 1TYK)

(-) 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:34
 aligned with MTX4_GRARO | Q7YT39 from UniProtKB/Swiss-Prot  Length:82

    Alignment length:34
                                    56        66        76    
            MTX4_GRARO   47 GCLEFWWKCNPNDDKCCRPKLKCSKLFKLCNFSF 80
               SCOP domains d1tyka_ A: GSmtx4                  SCOP domains
               CATH domains ---------------------------------- CATH domains
               Pfam domains ---------------------------------- Pfam domains
         Sec.struct. author .....................eee....eee... Sec.struct. author
                 SAPs(SNPs) ---------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------- PROSITE
                 Transcript ---------------------------------- Transcript
                  1tyk A  1 GCLEFWWKCNPNDDKCCRPKLKCSKLFKLCNFSF 34
                                    10        20        30
   Legend:   → Mismatch (orange background)
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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 1TYK)

(-) Pfam Domains  (0, 0)

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

(-) Gene Ontology  (4, 4)

NMR Structure(hide GO term definitions)
Chain A   (MTX4_GRARO | Q7YT39)
molecular function
    GO:0008200    ion channel inhibitor activity    Stops, prevents, or reduces the activity of an ion channel.
biological process
    GO:0042742    defense response to bacterium    Reactions triggered in response to the presence of a bacterium that act to protect the cell or organism.
    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.

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 Related Entries

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

UniProtKB/Swiss-Prot
        MTX4_GRARO | Q7YT39: 1lu8

(-) Related Entries Specified in the PDB File

1lqr THE CURRENT ENTRY REPLACES 1LQR. 1LQR HAD A SEQUENCE ERROR IN THE LAST TWO AMINO ACIDS.