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(-) Description

Title :  BMKTX TOXIN FROM SCORPION BUTHUS MARTENSII KARSCH, NMR, 25 STRUCTURES
 
Authors :  J. G. Renisio, R. Romi-Lebrun, E. Blanc, O. Bornet, T. Nakajima, H. Darbon
Date :  03 Jul 98  (Deposition) - 13 Jan 99  (Release) - 24 Feb 09  (Revision)
Method :  SOLUTION NMR
Resolution :  NOT APPLICABLE
Chains :  NMR Structure  :  A  (25x)
Keywords :  Scorpion, Neurotoxin, Nmr, Structure, Large Conductance Potassium Channel, Voltage Gated Potassium Channel, Buthus Martensii (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  J. G. Renisio, R. Romi-Lebrun, E. Blanc, O. Bornet, T. Nakajima, H. Darbon
Solution Structure Of Bmktx, A K+ Blocker Toxin From The Chinese Scorpion Buthus Martensi
Proteins V. 38 70 2000 (for further references see the PDB file header)

(-) Compounds

Molecule 1 - BMKTX
    Chains: A
    Engineered: YES
    Organism Common: CHINESE SCORPION
    Organism Scientific: MESOBUTHUS MARTENSII
    Organism Taxid: 34649
    Strain: KARSCH

 Structural Features

(-) Chains, Units

  
NMR Structure (25x): 

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
1AC1SOFTWAREPRO A:36 , LYS A:37BINDING SITE FOR RESIDUE NH2 A 38

(-) SS Bonds  (3, 3)

NMR Structure
No.Residues
1A:7 -A:27
2A:13 -A:32
3A:17 -A:34

(-) Cis Peptide Bonds  (0, 0)

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

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (1, 1)

NMR Structure (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1SCORP_SHORT_TOXINPS01138 Scorpion short toxins signature.KAX36_MESMA35-56  1A:13-34

(-) Exons   (0, 0)

(no "Exon" information available for 1BKT)

(-) 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:38
 aligned with KAX36_MESMA | Q9NII7 from UniProtKB/Swiss-Prot  Length:60

    Alignment length:38
                                    32        42        52        
           KAX36_MESMA   23 VGINVKCKHSGQCLKPCKDAGMRFGKCINGKCDCTPKG 60
               SCOP domains d1bkta_ A: Bmktx                       SCOP domains
               CATH domains -------------------------------------- CATH domains
               Pfam domains -------------------------------------- Pfam domains
         Sec.struct. author .............hhhhhhh....eee....eee.... Sec.struct. author
                 SAPs(SNPs) -------------------------------------- SAPs(SNPs)
                    PROSITE ------------SCORP_SHORT_TOXIN     ---- PROSITE
                 Transcript -------------------------------------- Transcript
                  1bkt A  1 VGINVKCKHSGQCLKPCKDAGMRFGKCINGKCDCTPKx 38
                                    10        20        30       |
                                                                38-NH2
   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 1BKT)

(-) Pfam Domains  (0, 0)

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

(-) Gene Ontology  (5, 5)

NMR Structure(hide GO term definitions)
Chain A   (KAX36_MESMA | Q9NII7)
molecular function
    GO:0008200    ion channel inhibitor activity    Stops, prevents, or reduces the activity of an ion channel.
    GO:0019870    potassium channel inhibitor activity    Stops, prevents, or reduces the activity of a potassium 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
        KAX36_MESMA | Q9NII7: 2k4u 2mla 2mld

(-) Related Entries Specified in the PDB File

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