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(-) Description

Title :  SOLUTION STRUCTURE OF A K+-CHANNEL BLOCKER FROM THE SCORPION TOXIN OF TITYUS CAMBRIDGEI
 
Authors :  I. Wang, S. -H. Wu, H. -K. Chang, R. -C. Shieh, H. -M. Yu, C. Chen
Date :  17 Jul 01  (Deposition) - 06 Feb 02  (Release) - 24 Feb 09  (Revision)
Method :  SOLUTION NMR
Resolution :  NOT APPLICABLE
Chains :  NMR Structure  :  A  (15x)
Keywords :  Scorpion Venom, Alpha-Ktx, K+-Channel Blocker, Nmr Structure, Toxin (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  I. Wang, S. H. Wu, H. K. Chang, R. C. Shieh, H. M. Yu, C. Chen
Solution Structure Of A K(+)-Channel Blocker From The Scorpion Tityus Cambridgei.
Protein Sci. V. 11 390 2002
PubMed-ID: 11790849  |  Reference-DOI: 10.1110/PS.33402
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - TITYUSTOXIN ALPHA-KTX
    Chains: A
    Engineered: YES
    Other Details: THIS SEQUENCE OCCURS NATURALLY IN SCORPION TOXIN.
    Synthetic: YES

 Structural Features

(-) Chains, Units

  
NMR Structure (15x): 

Summary Information (see also Sequences/Alignments below)

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

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(-) SS Bonds  (3, 3)

NMR Structure
No.Residues
1A:2 -A:15
2A:5 -A:20
3A:9 -A:22

(-) Cis Peptide Bonds  (0, 0)

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 Sequence-Structure Mapping

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(-) 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    
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SAPs(SNPs) PROSITE motifs Exons
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Chain A from PDB  Type:PROTEIN  Length:23
 aligned with KA131_TITOB | P83243 from UniProtKB/Swiss-Prot  Length:23

    Alignment length:23
                                    10        20   
           KA131_TITOB    1 ACGSCRKKCKGSGKCINGRCKCY 23
               SCOP domains d1jlza_ A:              SCOP domains
               CATH domains ----------------------- CATH domains
               Pfam domains ----------------------- Pfam domains
         Sec.struct. author ...hhhhhh...eeee..eeee. Sec.struct. author
                 SAPs(SNPs) ----------------------- SAPs(SNPs)
                    PROSITE ----------------------- PROSITE
                 Transcript ----------------------- Transcript
                  1jlz A  1 ACGSCRKKCKGSGKCINGRCKCY 23
                                    10        20
   Legend:   → Mismatch (orange background)
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  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)

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(-) Pfam Domains  (0, 0)

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(-) Gene Ontology  (5, 5)

NMR Structure(hide GO term definitions)
Chain A   (KA131_TITOB | P83243)
molecular function
    GO:0019870    potassium channel inhibitor activity    Stops, prevents, or reduces the activity of a potassium channel.
biological process
    GO:0019835    cytolysis    The rupture of cell membranes and the loss of cytoplasm.
    GO:0006952    defense response    Reactions, triggered in response to the presence of a foreign body or the occurrence of an injury, which result in restriction of damage to the organism attacked or prevention/recovery from the infection caused by the attack.
    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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