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(-) Description

Title :  ANALYSIS OF THE STRUCTURAL AND MOLECULAR BASIS OF VOLTAGE-SENSITIVE SODIUM CHANNEL INHIBITION BY THE SPIDER TOXIN, HUWENTOXIN-IV (-TRTX-HH2A).
 
Authors :  A. Gibbs, M. Flinspach
Date :  11 Feb 13  (Deposition) - 19 Jun 13  (Release) - 28 Aug 13  (Revision)
Method :  SOLUTION NMR
Resolution :  NOT APPLICABLE
Chains :  NMR Structure  :  A  (20x)
NMR Structure *:  A  (1x)
Keywords :  Venom, Toxin (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  N. A. Minassian, A. Gibbs, A. Y. Shih, Y. Liu, R. A. Neff, S. W. Sutton, T. Mirzadegan, J. Connor, R. Fellows, M. Husovsky, S. Nelson, M. J. Hunter, M. Flinspach, A. D. Wickenden
Analysis Of The Structural And Molecular Basis Of Voltage-Sensitive Sodium Channel Inhibition By The Spider Toxin Huwentoxin-Iv (Mu-Trtx-Hh2A).
J. Biol. Chem. V. 288 22707 2013
PubMed-ID: 23760503  |  Reference-DOI: 10.1074/JBC.M113.461392

(-) Compounds

Molecule 1 - MU-THERAPHOTOXIN-HH2A
    Chains: A
    Engineered: YES
    Expression System: HOMO SAPIENS
    Expression System Plasmid: PCDNA
    Expression System Taxid: 9606
    Expression System Vector Type: PLASMID
    Fragment: UNP RESIDUES 53-87
    Organism Common: CHINESE BIRD SPIDER,CHINESE GOLDEN EARTH TIGER
    Organism Scientific: HAPLOPELMA SCHMIDTI
    Organism Taxid: 29017
    Synonym: MU-TRTX-HH2A, HUWENTOXIN-4, HUWENTOXIN-IV, HWTX-IV, HUWENTOXIN-IVA, HWTX-IVA, HUWENTOXIN-IVB, HWTX-IVB, HUWENTOXIN-IVC, HWTX-IVC

 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)

(no "Ligand,Modified Residues,Ions" information available for 2M4X)

(-) Sites  (0, 0)

(no "Site" information available for 2M4X)

(-) SS Bonds  (3, 3)

NMR Structure
No.Residues
1A:2 -A:17
2A:9 -A:24
3A:16 -A:31

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 2M4X)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 2M4X)

(-) PROSITE Motifs  (1, 1)

NMR Structure (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1HWTX_1PS60021 Huwentoxin-1 family signature.TXH4_HAPSC54-83  1A:2-31
NMR Structure * (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1HWTX_1PS60021 Huwentoxin-1 family signature.TXH4_HAPSC54-83  1A:2-31

(-) Exons   (0, 0)

(no "Exon" information available for 2M4X)

(-) 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:35
 aligned with TXH4_HAPSC | P83303 from UniProtKB/Swiss-Prot  Length:89

    Alignment length:35
                                    62        72        82     
            TXH4_HAPSC   53 ECLEIFKACNPSNDQCCKSSKLVCSRKTRWCKYQI 87
               SCOP domains d2m4xa_ A: Huwentoxin-IV            SCOP domains
               CATH domains ----------------------------------- CATH domains
               Pfam domains ----------------------------------- Pfam domains
         Sec.struct. author .....................ee........ee.. Sec.struct. author
                 SAPs(SNPs) ----------------------------------- SAPs(SNPs)
                    PROSITE -HWTX_1  PDB: A:2-31           ---- PROSITE
                 Transcript ----------------------------------- Transcript
                  2m4x A  1 ECLEIFKACNPSNDQCCKSSKLVCSRKTRWCKYQI 35
                                    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 2M4X)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 2M4X)

(-) Gene Ontology  (4, 4)

NMR Structure(hide GO term definitions)
Chain A   (TXH4_HAPSC | P83303)
molecular function
    GO:0008200    ion channel inhibitor activity    Stops, prevents, or reduces the activity of an ion channel.
biological process
    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.
    GO:0072556    other organism presynaptic membrane    A presynaptic membrane that is part of another organism, i.e. a secondary organism with which the first organism is interacting. A presynaptic membrane is specialized area of membrane of the axon terminal that faces the plasma membrane of the neuron or muscle fiber with which the axon terminal establishes a synaptic junction; many synaptic junctions exhibit structural presynaptic characteristics, such as conical, electron-dense internal protrusions, that distinguish it from the remainder of the axon plasma membrane.

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  2m4x
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  TXH4_HAPSC | P83303
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 Related Entries

(-) Entries Sharing at Least One Protein Chain (UniProt ID)

UniProtKB/Swiss-Prot
        TXH4_HAPSC | P83303: 1mb6 2m4z 2m50 5tlr

(-) Related Entries Specified in the PDB File

2m4z 2m50