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(-) Description

Title :  SOLUTION STRUCTURE OF BMKK4, A NOVEL POTASSIUM CHANNEL BLOCKER FROM SCORPION BUTHUS MARTENSII KARSCH, 25 STRUCTURES
 
Authors :  N. Zhang, X. Chen, M. Li, C. Cao, Y. Wang, G. Hu, H. Wu
Date :  02 Feb 04  (Deposition) - 08 Feb 05  (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 :  N. Zhang, X. Chen, M. Li, C. Cao, Y. Wang, G. Wu, G. Hu, H. Wu
Solution Structure Of Bmkk4, The First Member Of Subfamily Alpha-Ktx 17 Of Scorpion Toxins
Biochemistry V. 43 12469 2004
PubMed-ID: 15449936  |  Reference-DOI: 10.1021/BI0490643
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - TOXIN BMKK4
    Chains: A
    Organism Common: CHINESE SCORPION
    Organism Scientific: MESOBUTHUS MARTENSII
    Organism Taxid: 34649
    Synonym: KK4, TOXIN TXKS4, ALPHA-KTX 17.1

 Structural Features

(-) Chains, Units

  
NMR Structure (25x): 

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (2, 2)

NMR Structure (2, 2)
No.NameCountTypeFull Name
1NH21Mod. Amino AcidAMINO GROUP
2PCA1Mod. Amino AcidPYROGLUTAMIC ACID

(-) Sites  (1, 1)

NMR Structure (1, 1)
No.NameEvidenceResiduesDescription
1AC1SOFTWARETHR A:30BINDING SITE FOR RESIDUE NH2 A 31

(-) SS Bonds  (3, 3)

NMR Structure
No.Residues
1A:4 -A:20
2A:10 -A:25
3A:14 -A:27

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 1S8K)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 1S8K)

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 1S8K)

(-) Exons   (0, 0)

(no "Exon" information available for 1S8K)

(-) 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 KA171_MESMA | Q95NJ8 from UniProtKB/Swiss-Prot  Length:55

    Alignment length:31
                                    33        43        53 
           KA171_MESMA   24 QTQCQSVRDCQQYCLTPDRCSYGTCYCKTTG 54
               SCOP domains ------------------------------- SCOP domains
               CATH domains ------------------------------- CATH domains
               Pfam domains -Toxin_2-1s8kA01 A:2-28     --- Pfam domains
         Sec.struct. author .....hhhhhhhhh..eeeee..eeee.... Sec.struct. author
                 SAPs(SNPs) ------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------- PROSITE
                 Transcript ------------------------------- Transcript
                  1s8k A  1 xTQCQSVRDCQQYCLTPDRCSYGTCYCKTTx 31
                            |       10        20        30|
                            |                            31-NH2
                            1-PCA
   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  (0, 0)

(no "SCOP Domain" information available for 1S8K)

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 1S8K)

(-) Pfam Domains  (1, 1)

NMR Structure
(-)
Clan: Knottin_1 (78)

(-) Gene Ontology  (1, 1)

NMR Structure(hide GO term definitions)
Chain A   (KA171_MESMA | Q95NJ8)
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

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1du9 SOLUTION STRUCTURES OF BMP02, A NATURAL SCORPION TOXIN WHICH BLOCKS APAMIN-SENSITIVE CALCIUM-ACTIVATED POTASSIUM CHANNEL
1pnh SOLUTION STRUCTURES OF P05-NH2, A SCORPION TOXIN ANALOG WITH HIGH AFFINITY FOR THE APAMIN-SENSITIVE POTASSIUM CHANNEL
1scy SOLUTION STRUCTURES OF SCYLLATOXIN, A SCORPION TOXIN WITH HIGH AFFINITY FOR APAMIN-SENSITIVE CALCIUM-ACTIVATED POTASSIUM CHANNELS