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(-) Description

Title :  SOLUTION STRUCTURE OF A NOVEL HKV1.1 INHIBITING SCORPION TOXIN FROM MESIBUTHUS TAMULUS
 
Authors :  G. S. Kumar, S. Upadhyay, M. K. Mathew, S. P. Sarma
Date :  26 Jan 10  (Deposition) - 02 Feb 11  (Release) - 02 Feb 11  (Revision)
Method :  SOLUTION NMR
Resolution :  NOT APPLICABLE
Chains :  NMR Structure  :  A  (20x)
NMR Structure *:  A  (1x)
Keywords :  Btk-2, Scorpion Toxin, Kv1. 1, Disulfide Bond, Ionic Channel Inhibitor, Neurotoxin, Potassium Channel Inhibitor, Secreted, Toxin (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  G. S. Kumar, S. Upadhyay, M. K. Mathew, S. P. Sarma
Solution Structure Of Btk-2, Next Term A Novel Hkv1. 1 Inhibiting Scorpion Toxin, From The Eastern Indian Scorpion Mesobuthus Tamulus
Biochem. Biophys. Acta 2011 Proteins & Proteomics
PubMed: search  |  Reference-DOI: 10.1016/J.BBAPAP.2011.01.006

(-) Compounds

Molecule 1 - POTASSIUM CHANNEL TOXIN ALPHA-KTX 9.4
    Chains: A
    Engineered: YES
    Expression System: ESCHERICHIA COLI
    Expression System Taxid: 562
    Expression System Vector: PET21
    Expression System Vector Type: VECTOR
    Organism Common: EASTERN INDIAN SCORPION
    Organism Scientific: MESOBUTHUS TAMULUS
    Organism Taxid: 34647
    Synonym: BT BTK-2, TOXIN BTK-2

 Structural Features

(-) Chains, Units

  1
NMR Structure (20x): A
NMR Structure * (1x): A

Summary Information (see also Sequences/Alignments below)

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

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(-) Sites  (0, 0)

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(-) SS Bonds  (3, 3)

NMR Structure
No.Residues
1A:5 -A:21
2A:8 -A:26
3A:12 -A:28

(-) Cis Peptide Bonds  (0, 0)

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 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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(-) Exons   (0, 0)

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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
(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:34
 aligned with KAX94_MESTA | P60209 from UniProtKB/Swiss-Prot  Length:32

    Alignment length:34
                              1                               
                              |      8        18        28    
           KAX94_MESTA    - --VGCAECPMHCKGKMAKPTCENEVCKCNIGKKD 32
               SCOP domains d2ktca_ A: automated matches       SCOP domains
               CATH domains ---------------------------------- CATH domains
               Pfam domains --Toxin_6-2ktcA01 A:3-30      ---- Pfam domains
         Sec.struct. author ..hhhhhhhhh.......eeee..eeee...... Sec.struct. author
                 SAPs(SNPs) ---------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------- PROSITE
                 Transcript ---------------------------------- Transcript
                  2ktc A  1 GSVGCAECPMHCKGKMAKPTCENEVCKCNIGKKD 34
                                    10        20        30
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 Classification and Annotation

(-) SCOP Domains  (1, 1)

NMR Structure
(-)
Class: Small proteins (3458)

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 2KTC)

(-) Pfam Domains  (1, 1)

NMR Structure
(-)
Clan: no clan defined [family: Toxin_6] (3)

(-) Gene Ontology  (4, 4)

NMR Structure(hide GO term definitions)
Chain A   (KAX94_MESTA | P60209)
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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