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(-) Description

Title :  SOLUTION STRUCTURE OF THE POTASSIUM CHANNEL SCORPION TOXIN HSTX1
 
Authors :  P. Savarin, R. Romi-Lebrun, S. Zinn-Justin, B. Lebrun, T. Nakajima, B. Gilquin, A. Menez
Date :  05 Jul 99  (Deposition) - 07 Jul 00  (Release) - 24 Feb 09  (Revision)
Method :  SOLUTION NMR
Resolution :  NOT APPLICABLE
Chains :  NMR Structure  :  A  (20x)
Keywords :  Scorpion Toxin, Alpha Beta, Nmr, Molecular Modeling, Potassium Channel (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  P. Savarin, R. Romi-Lebrun, S. Zinn-Justin, B. Lebrun, T. Nakajima, B. Gilquin, A. Menez
Structural And Functional Consequences Of The Presence Of A Fourth Disulfide Bridge In The Scorpion Short Toxins: Solution Structure Of The Potassium Channel Inhibitor Hstx1.
Protein Sci. V. 8 2672 1999
PubMed-ID: 10631983
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - HSTX1 TOXIN
    Chains: A
    Engineered: YES
    Other Details: CHEMICALLY SYNTHESIZED
    Other Details - Source: SOLID PHASE CHEMICAL SYNTHESIS USING THE FMOC METHODOLOGY. THE SEQUENCE OF THIS PEPTIDE OCCURS NATURALLY IN SCORPIONS (SCORPIONIDAE).
    Synthetic: YES

 Structural Features

(-) Chains, Units

  
NMR Structure (20x): 

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
1AC1SOFTWAREARG A:33 , CYS A:34BINDING SITE FOR RESIDUE NH2 A 35

(-) SS Bonds  (4, 4)

NMR Structure
No.Residues
1A:3 -A:24
2A:9 -A:29
3A:13 -A:31
4A:19 -A:34

(-) Cis Peptide Bonds  (0, 0)

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

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (1, 1)

NMR Structure (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1SCORP_SHORT_TOXINPS01138 Scorpion short toxins signature.KAX63_HETSP9-31  1A:9-31

(-) Exons   (0, 0)

(no "Exon" information available for 1QUZ)

(-) 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:35
 aligned with KAX63_HETSP | P59867 from UniProtKB/Swiss-Prot  Length:34

    Alignment length:35
                                                            34     
                                    10        20        30   | 
           KAX63_HETSP    1 ASCRTPKDCADPCRKETGCPYGKCMNRKCKCNRC-  -
               SCOP domains d1quza_ A:                          SCOP domains
               CATH domains ----------------------------------- CATH domains
               Pfam domains Toxin_2-1quzA01 A:1-32          --- Pfam domains
         Sec.struct. author ....hhhhhhhhhhhhh....eee....eee.... Sec.struct. author
                 SAPs(SNPs) ----------------------------------- SAPs(SNPs)
                    PROSITE --------SCORP_SHORT_TOXIN      ---- PROSITE
                 Transcript ----------------------------------- Transcript
                  1quz A  1 ASCRTPKDCADPCRKETGCPYGKCMNRKCKCNRCx 35
                                    10        20        30    |
                                                             35-NH2
   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: Designed proteins (167)

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 1QUZ)

(-) Pfam Domains  (1, 1)

NMR Structure
(-)
Clan: Knottin_1 (78)

(-) Gene Ontology  (4, 4)

NMR Structure(hide GO term definitions)
Chain A   (KAX63_HETSP | P59867)
molecular function
    GO:0008200    ion channel inhibitor activity    Stops, prevents, or reduces the activity of an ion channel.
biological process
    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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 Related Entries

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

UniProtKB/Swiss-Prot
        KAX63_HETSP | P59867: 1wpd 1y2p

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