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(-) Description

Title :  SOLUTION STRUCTURE OF TOXIN CN12 FROM CENTRUROIDES NOXIUS ALFA SCORPION TOXIN ACTING ON SODIUM CHANNELS. NMR STRUCTURE
 
Authors :  F. Del Rio-Portilla, E. Hernandez-Marin, G. Pimienta, F. V. Coronas, F. Z. Zamudio, R. C. Rodrguez De La Vega, E. Wanke, L. D. Possani
Date :  21 May 03  (Deposition) - 25 May 04  (Release) - 24 Feb 09  (Revision)
Method :  SOLUTION NMR
Resolution :  NOT APPLICABLE
Chains :  NMR Structure  :  A  (19x)
Keywords :  Toxin, Scorpion Toxin, Centruroides Noxius, Sodium Channels Alpha Toxin (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  F. Del Rio-Portilla, E. Hernandez-Marin, G. Pimienta, F. V. Coronas, F. Z. Zamudio, R. C. Rodrguez De La Vega, E. Wanke, L. D. Possani
Nmr Solution Structure Of Cn12, A Novel Peptide From The Mexican Scorpion Centruroides Noxius With A Typical Beta-Toxin Sequence But With Alpha-Like Physiological Activity.
Eur. J. Biochem. V. 271 2504 2004
PubMed-ID: 15182366  |  Reference-DOI: 10.1111/J.1432-1033.2004.04181.X
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - NEUROTOXIN CN11
    Chains: A
    Organism Common: MEXICAN SCORPION
    Organism Scientific: CENTRUROIDES NOXIUS
    Organism Taxid: 6878
    Other Details: TOXIN OBTAINED DIRECTLY FROM VENOM OF CENTRUROIDES NOXIUS. ACTIVITY IS VERY LOW, HOWEVER CN12 HAS SOME REQUIREMENTS FOR BEING A VERY ACTIVE TOXIN.
    Secretion: VENOM
    Synonym: CN12

 Structural Features

(-) Chains, Units

  
NMR Structure (19x): 

Summary Information (see also Sequences/Alignments below)

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

(no "Ligand,Modified Residues,Ions" information available for 1PE4)

(-) Sites  (0, 0)

(no "Site" information available for 1PE4)

(-) SS Bonds  (4, 4)

NMR Structure
No.Residues
1A:11 -A:65
2A:15 -A:40
3A:25 -A:45
4A:29 -A:47

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 1PE4)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 1PE4)

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 1PE4)

(-) Exons   (0, 0)

(no "Exon" information available for 1PE4)

(-) 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
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Chain A from PDB  Type:PROTEIN  Length:67
 aligned with SCX12_CENNO | P63019 from UniProtKB/Swiss-Prot  Length:67

    Alignment length:67
                                    10        20        30        40        50        60       
           SCX12_CENNO    1 RDGYPLASNGCKFGCSGLGENNPTCNHVCEKKAGSDYGYCYAWTCYCEHVAEGTVLWGDSGTGPCRS 67
               SCOP domains d1pe4a_ A: Scorpion toxin                                           SCOP domains
               CATH domains 1pe4A00 A:1-67  [code=3.30.30.10, no name defined]                  CATH domains
               Pfam domains Toxin_3-1pe4A01 A:1-54                                ------------- Pfam domains
         Sec.struct. author .ee....................hhhhhhhhh.....ee......eee................... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------- Transcript
                  1pe4 A  1 RDGYPLASNGCKFGCSGLGENNPTCNHVCEKKAGSDYGYCYAWTCYCEHVAEGTVLWGDSGTGPCRS 67
                                    10        20        30        40        50        60
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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  (1, 1)

NMR Structure
(-)
Class: Alpha Beta (26913)

(-) Pfam Domains  (1, 1)

NMR Structure
(-)
Clan: Knottin_1 (78)

(-) Gene Ontology  (3, 3)

NMR Structure(hide GO term definitions)
Chain A   (SCX12_CENNO | P63019)
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.
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)

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(-) Related Entries Specified in the PDB File

1cn2 SAME SECONDARY STRUCTURE AS NA+ CHANNEL TOXINS.