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(-) Description

Title :  STRUCTURE OF AN EXCITATORY INSECT-SPECIFIC TOXIN WITH AN ANALGESIC EFFECT ON MAMMALIAN FROM SCORPION BUTHUS MARTENSII KARSCH
 
Authors :  C. Li, R. -J. Guan, Y. Xiang, Y. Zhang, D. -C. Wang
Date :  14 Apr 04  (Deposition) - 28 Dec 04  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.60
Chains :  Asym. Unit :  A,B
Biol. Unit 1:  A  (1x)
Biol. Unit 2:  B  (1x)
Biol. Unit 3:  A,B  (4x)
Biol. Unit 4:  A (2x),B (2x)
Biol. Unit 5:  A (2x),B (2x)
Biol. Unit 6:  A (2x),B (2x)
Biol. Unit 7:  A,B  (2x)
Biol. Unit 8:  A (1x),B (1x)
Biol. Unit 9:  A  (2x)
Keywords :  Alpha-Beta, Toxin (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  C. Li, R. J. Guan, Y. Xiang, Y. Zhang, D. C. Wang
Structure Of An Excitatory Insect-Specific Toxin With An Analgesic Effect On Mammals From The Scorpion Buthus Martensii Karsch.
Acta Crystallogr. , Sect. D V. 61 14 2005
PubMed-ID: 15608371  |  Reference-DOI: 10.1107/S0907444904025703
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - INSECT NEUROTOXIN
    Chains: A, B
    Organism Common: CHINESE SCORPION
    Organism Scientific: MESOBUTHUS MARTENSII
    Organism Taxid: 34649

 Structural Features

(-) Chains, Units

  12
Asymmetric Unit : AB
Biological Unit 1 (1x): A 
Biological Unit 2 (1x):  B
Biological Unit 3 (4x): AB
Biological Unit 4 (2x): A (2x)B (2x)
Biological Unit 5 (2x): A (2x)B (2x)
Biological Unit 6 (2x): A (2x)B (2x)
Biological Unit 7 (2x): AB
Biological Unit 8 (1x): A (1x)B (1x)
Biological Unit 9 (2x): A 

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (1, 11)

Asymmetric Unit (1, 11)
No.NameCountTypeFull Name
1SO411Ligand/IonSULFATE ION
Biological Unit 1 (1, 8)
No.NameCountTypeFull Name
1SO48Ligand/IonSULFATE ION
Biological Unit 2 (1, 3)
No.NameCountTypeFull Name
1SO43Ligand/IonSULFATE ION
Biological Unit 3 (1, 44)
No.NameCountTypeFull Name
1SO444Ligand/IonSULFATE ION
Biological Unit 4 (1, 16)
No.NameCountTypeFull Name
1SO416Ligand/IonSULFATE ION
Biological Unit 5 (1, 16)
No.NameCountTypeFull Name
1SO416Ligand/IonSULFATE ION
Biological Unit 6 (1, 16)
No.NameCountTypeFull Name
1SO416Ligand/IonSULFATE ION
Biological Unit 7 (1, 22)
No.NameCountTypeFull Name
1SO422Ligand/IonSULFATE ION
Biological Unit 8 (1, 8)
No.NameCountTypeFull Name
1SO48Ligand/IonSULFATE ION
Biological Unit 9 (1, 16)
No.NameCountTypeFull Name
1SO416Ligand/IonSULFATE ION

(-) Sites  (11, 11)

Asymmetric Unit (11, 11)
No.NameEvidenceResiduesDescription
01AC1SOFTWARECYS A:16 , LEU A:17 , PHE A:18 , TYR A:21 , LEU A:71 , HOH A:149BINDING SITE FOR RESIDUE SO4 A 101
02AC2SOFTWARECYS A:37 , CYS A:38 , LEU A:39 , TYR A:63 , SO4 A:103BINDING SITE FOR RESIDUE SO4 A 102
03AC3SOFTWARETYR A:36 , TYR A:63 , VAL A:66 , SO4 A:102BINDING SITE FOR RESIDUE SO4 A 103
04AC4SOFTWAREASP A:65 , GLN A:67 , SO4 A:110 , HOH A:151 , LEU B:71BINDING SITE FOR RESIDUE SO4 A 104
05AC5SOFTWARETRP A:57 , SO4 A:108 , HOH A:147 , GLU B:15 , TYR B:21BINDING SITE FOR RESIDUE SO4 A 105
06AC6SOFTWARECYS B:37 , CYS B:38 , LEU B:39 , TYR B:63 , HOH B:122BINDING SITE FOR RESIDUE SO4 B 106
07AC7SOFTWAREILE A:56 , TRP A:57 , THR A:60 , HOH A:114 , SER B:9BINDING SITE FOR RESIDUE SO4 A 107
08AC8SOFTWAREASP A:58 , SER A:59 , SO4 A:105 , CYS B:16 , LEU B:17 , PHE B:18 , TYR B:21BINDING SITE FOR RESIDUE SO4 A 108
09AC9SOFTWARETRP B:57 , ASP B:58 , SER B:59 , HOH B:115BINDING SITE FOR RESIDUE SO4 B 109
10BC1SOFTWARELYS A:34 , ILE A:68 , ILE A:69 , SO4 A:104BINDING SITE FOR RESIDUE SO4 A 110
11BC2SOFTWAREASP B:55 , ILE B:56 , TRP B:57 , THR B:60BINDING SITE FOR RESIDUE SO4 B 111

(-) SS Bonds  (8, 8)

Asymmetric Unit
No.Residues
1A:16 -A:37
2A:22 -A:42
3A:26 -A:44
4A:38 -A:64
5B:16 -B:37
6B:22 -B:42
7B:26 -B:44
8B:38 -B:64

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 1T0Z)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 1T0Z)

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 1T0Z)

(-) Exons   (0, 0)

(no "Exon" information available for 1T0Z)

(-) Sequences/Alignments

Asymmetric Unit
   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:72
 aligned with SIXP_MESMA | O77091 from UniProtKB/Swiss-Prot  Length:90

    Alignment length:72
                                    28        38        48        58        68        78        88  
            SIXP_MESMA   19 KKNGYAVDSSGKVAECLFNNYCNNECTKVYYADKGYCCLLKCYCFGLADDKPVLDIWDSTKNYCDVQIIDLS 90
               SCOP domains d1t0za_ A: Scorpion toxin                                                SCOP domains
               CATH domains 1t0zA00 A:1-72  [code=3.30.30.10, no name defined]                       CATH domains
               Pfam domains ------------------------------------------------------------------------ Pfam domains
         Sec.struct. author .eeee............hhhhhhhhhhhhhh..eeeee..eeeeeee.........hhhhhhhhhh...... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------ SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------ PROSITE
                 Transcript ------------------------------------------------------------------------ Transcript
                  1t0z A  1 KKNGYAVDSSGKVAECLFNNYCNNECTKVYYADKGYCCLLKCYCFGLADDKPVLDIWDSTKNYCDVQIIDLS 72
                                    10        20        30        40        50        60        70  


Chain B from PDB  Type:PROTEIN  Length:72
 aligned with SIXP_MESMA | O77091 from UniProtKB/Swiss-Prot  Length:90

    Alignment length:72
                                    28        38        48        58        68        78        88  
            SIXP_MESMA   19 KKNGYAVDSSGKVAECLFNNYCNNECTKVYYADKGYCCLLKCYCFGLADDKPVLDIWDSTKNYCDVQIIDLS 90
               SCOP domains d1t0zb_ B: Scorpion toxin                                                SCOP domains
               CATH domains 1t0zB00 B:1-72  [code=3.30.30.10, no name defined]                       CATH domains
           Pfam domains (1) -Toxin_3-1t0zB01 B:2-51                            --------------------- Pfam domains (1)
           Pfam domains (2) -Toxin_3-1t0zB02 B:2-51                            --------------------- Pfam domains (2)
         Sec.struct. author .eee.............hhhhhhhhhhhh....eeeee..eeeeeee.........hhhhhhhhhh...... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------ SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------ PROSITE
                 Transcript ------------------------------------------------------------------------ Transcript
                  1t0z B  1 KKNGYAVDSSGKVAECLFNNYCNNECTKVYYADKGYCCLLKCYCFGLADDKPVLDIWDSTKNYCDVQIIDLS 72
                                    10        20        30        40        50        60        70
   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, 2)

Asymmetric Unit
(-)
Class: Small proteins (3458)

(-) CATH Domains  (1, 2)

Asymmetric Unit
(-)
Class: Alpha Beta (26913)

(-) Pfam Domains  (1, 2)

Asymmetric Unit
(-)
Clan: Knottin_1 (78)

(-) Gene Ontology  (3, 3)

Asymmetric Unit(hide GO term definitions)
Chain A,B   (SIXP_MESMA | O77091)
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.
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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