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(-) Description

Title :  SOLUTION STRUCTURE OF BMBKTX1 A NEW POTASSIUM CHANNEL BLOCKER FROM THE CHINESE SCORPION BUTHUS MARTENSI KARSCH
 
Authors :  Z. Cai, C. Xu, Y. Xu, W. Lu, C. W. Chi, Y. Shi, J. Wu
Date :  25 Jul 03  (Deposition) - 09 Sep 03  (Release) - 24 Feb 09  (Revision)
Method :  SOLUTION NMR
Resolution :  NOT APPLICABLE
Chains :  NMR Structure  :  A  (21x)
Keywords :  Alpha-Helix, Beta-Sheet, Toxin (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  Z. Cai, C. Xu, Y. Xu, W. Lu, C. W. Chi, Y. Shi, J. Wu
Solution Structure Of Bmbktx1, A New Bk(Ca)(1) Channel Blocker From The Chinese Scorpion Buthus Martensi Karsch(, ).
Biochemistry V. 43 3764 2004
PubMed-ID: 15049683  |  Reference-DOI: 10.1021/BI035412+
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - NEUROTOXIN BMK37
    Chains: A
    Engineered: YES
    Other Details: SOLID PHASE PEPTIDE SYNTHESIS
    Synonym: BMBKTX1
    Synthetic: YES

 Structural Features

(-) Chains, Units

  
NMR Structure (21x): 

Summary Information (see also Sequences/Alignments below)

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

(no "Ligand,Modified Residues,Ions" information available for 1Q2K)

(-) Sites  (0, 0)

(no "Site" information available for 1Q2K)

(-) SS Bonds  (3, 3)

NMR Structure
No.Residues
1A:3 -A:22
2A:8 -A:27
3A:12 -A:29

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 1Q2K)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 1Q2K)

(-) PROSITE Motifs  (1, 1)

NMR Structure (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1SCORP_SHORT_TOXINPS01138 Scorpion short toxins signature.KA191_MESMA8-29  1A:8-29

(-) Exons   (0, 0)

(no "Exon" information available for 1Q2K)

(-) 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:31
 aligned with KA191_MESMA | P83407 from UniProtKB/Swiss-Prot  Length:31

    Alignment length:31
                                    10        20        30 
           KA191_MESMA    1 AACYSSDCRVKCVAMGFSSGKCINSKCKCYK 31
               SCOP domains d1q2ka_ A: Neurotoxin bmk37     SCOP domains
               CATH domains ------------------------------- CATH domains
               Pfam domains Toxin_2-1q2kA01 A:1-30        - Pfam domains
         Sec.struct. author ...hhhhhhhhhhhh....eee....eee.. Sec.struct. author
                 SAPs(SNPs) ------------------------------- SAPs(SNPs)
                    PROSITE -------SCORP_SHORT_TOXIN     -- PROSITE
                 Transcript ------------------------------- Transcript
                  1q2k A  1 AACYSSDCRVKCVAMGFSSGKCINSKCKCYK 31
                                    10        20        30
   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 1Q2K)

(-) Pfam Domains  (1, 1)

NMR Structure
(-)
Clan: Knottin_1 (78)

(-) Gene Ontology  (4, 4)

NMR Structure(hide GO term definitions)
Chain A   (KA191_MESMA | P83407)
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
        KA191_MESMA | P83407: 1r1g 3e8y

(-) Related Entries Specified in the PDB File

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