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(-) Description

Title :  SOLUTION STRUCTURE OF A NEW POTASSIUM CHANNELS BLOCKER FROM THE VENOM OF CHINESE SCORPION BUTHUS MARTENSI KARSCH
 
Authors :  Y. Wang, M. Li, N. Zhang, G. Wu, G. Hu, H. Wu
Date :  25 Jun 02  (Deposition) - 06 Apr 04  (Release) - 24 Feb 09  (Revision)
Method :  SOLUTION NMR
Resolution :  NOT APPLICABLE
Chains :  NMR Structure  :  A  (25x)
Keywords :  Alpha/Beta Scaffold, Toxin (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  Y. Wang, X. Chen, N. Zhang, G. Wu, H. Wu
The Solution Structure Of Bmtx3B, A Member Of The Scorpion Toxin Subfamily Alpha-Ktx 16
Proteins V. 58 489 2005
PubMed-ID: 15558557  |  Reference-DOI: 10.1002/PROT.20322
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - TOXIN BMTX3
    Chains: A
    Organism Common: CHINESE SCORPION
    Organism Scientific: MESOBUTHUS MARTENSII
    Organism Taxid: 34649
    Secretion: VENOM
    Synonym: NEUROTOXIN TX3

 Structural Features

(-) Chains, Units

  
NMR Structure (25x): 

Summary Information (see also Sequences/Alignments below)

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

(no "Ligand,Modified Residues,Ions" information available for 1M2S)

(-) Sites  (0, 0)

(no "Site" information available for 1M2S)

(-) SS Bonds  (3, 3)

NMR Structure
No.Residues
1A:8 -A:29
2A:14 -A:34
3A:18 -A:36

(-) Cis Peptide Bonds  (0, 0)

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 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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(-) PROSITE Motifs  (1, 1)

NMR Structure (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1SCORP_SHORT_TOXINPS01138 Scorpion short toxins signature.KA162_MESMA36-58  1A:14-36

(-) Exons   (0, 0)

(no "Exon" information available for 1M2S)

(-) 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:37
 aligned with KA162_MESMA | Q9NBG9 from UniProtKB/Swiss-Prot  Length:59

    Alignment length:37
                                    32        42        52       
           KA162_MESMA   23 FGLIDVKCFASSECWTACKKVTGSGQGKCQNNQCRCY 59
               SCOP domains d1m2sa_ A: Bmtx3                      SCOP domains
               CATH domains ------------------------------------- CATH domains
               Pfam domains -----Toxin_2-1m2sA01 A:6-37           Pfam domains
         Sec.struct. author .........hhhhhhhhhhhhh....eeee..eeee. Sec.struct. author
                 SAPs(SNPs) ------------------------------------- SAPs(SNPs)
                    PROSITE -------------SCORP_SHORT_TOXIN      - PROSITE
                 Transcript ------------------------------------- Transcript
                  1m2s A  1 FGLIDVKCFASSECWTACKKVTGSGQGKCQNNQCRCY 37
                                    10        20        30
   Legend:   → Mismatch (orange background)
  - → Gap (green background, '-', border residues have a numbering label)
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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 1M2S)

(-) Pfam Domains  (1, 1)

NMR Structure
(-)
Clan: Knottin_1 (78)

(-) Gene Ontology  (4, 4)

NMR Structure(hide GO term definitions)
Chain A   (KA162_MESMA | Q9NBG9)
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)

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(-) Related Entries Specified in the PDB File

1big 1BIG CONTAINS SCORPION TOXIN BMTX1
1lir 1LIR CONTAINS SCORPION TOXIN LQ2
2bmt 2BMT CONTAINS SCORPION TOXIN BMTX2
2crd 2CRD CONTAINS CHARYBDOTOXIN