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(-) Description

Title :  TRIPLE MUTANT 8D9D10V OF SCORPION TOXIN LQH-ALPHA-IT
 
Authors :  R. Kahn, I. Karbat, M. Gurevitz, F. Frolow
Date :  24 Aug 05  (Deposition) - 05 Sep 06  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  1.60
Chains :  Asym. Unit :  A,B
Biol. Unit 1:  A  (1x)
Biol. Unit 2:  B  (1x)
Keywords :  Alpha Toxin, Muation, Scorpion (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  R. Kahn, I. Karbat, M. Gurevitz, F. Frolow
X-Ray Structures Of Lqh-Alpha-It And Lqh-Alpha-It8D9D10V Mutant
To Be Published
PubMed: search
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - NEUROTOXIN ALPHA-IT
    Chains: A, B
    Engineered: YES
    Expression System: ESCHERICHIA COLI BL21
    Expression System Plasmid: PET-11
    Expression System Strain: BL21
    Expression System Taxid: 511693
    Expression System Vector Type: PLASMID
    Mutation: YES
    Organism Common: EGYPTIAN SCORPION
    Organism Scientific: LEIURUS QUINQUESTRIATUS
    Organism Taxid: 6883
    Tissue: VENOM GLAND

 Structural Features

(-) Chains, Units

  12
Asymmetric Unit : AB
Biological Unit 1 (1x): A 
Biological Unit 2 (1x):  B

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (3, 5)

Asymmetric Unit (3, 5)
No.NameCountTypeFull Name
1CL1Ligand/IonCHLORIDE ION
2EDO2Ligand/Ion1,2-ETHANEDIOL
3NO32Ligand/IonNITRATE ION
Biological Unit 1 (1, 1)
No.NameCountTypeFull Name
1CL-1Ligand/IonCHLORIDE ION
2EDO-1Ligand/Ion1,2-ETHANEDIOL
3NO31Ligand/IonNITRATE ION
Biological Unit 2 (2, 3)
No.NameCountTypeFull Name
1CL-1Ligand/IonCHLORIDE ION
2EDO2Ligand/Ion1,2-ETHANEDIOL
3NO31Ligand/IonNITRATE ION

(-) Sites  (5, 5)

Asymmetric Unit (5, 5)
No.NameEvidenceResiduesDescription
1AC1SOFTWARECYS A:13 , VAL A:14 , ARG A:59 , CYS A:64 , HOH A:73 , TYR B:43 , HOH B:688BINDING SITE FOR RESIDUE NO3 A 66
2AC2SOFTWAREVAL B:14 , ARG B:59 , CYS B:64BINDING SITE FOR RESIDUE CL B 301
3AC3SOFTWAREPRO A:53 , ASN A:55 , HOH A:76 , HOH A:169 , ARG B:19 , ALA B:21 , HOH B:610 , HOH B:656BINDING SITE FOR RESIDUE NO3 B 401
4AC4SOFTWARETYR B:6 , GLN B:38 , GLY B:41 , LYS B:42 , TYR B:43 , GLY B:44 , ALA B:46 , EDO B:601BINDING SITE FOR RESIDUE EDO B 501
5AC5SOFTWARETYR B:6 , LYS B:42 , VAL B:60 , PRO B:61 , EDO B:501 , HOH B:660 , HOH B:663BINDING SITE FOR RESIDUE EDO B 601

(-) SS Bonds  (8, 8)

Asymmetric Unit
No.Residues
1A:13 -A:64
2A:17 -A:37
3A:23 -A:47
4A:27 -A:49
5B:13 -B:64
6B:17 -B:37
7B:23 -B:47
8B:27 -B:49

(-) Cis Peptide Bonds  (0, 0)

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

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 2ATB)

(-) Exons   (0, 0)

(no "Exon" information available for 2ATB)

(-) 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:65
 aligned with SCXA_LEIQH | P17728 from UniProtKB/Swiss-Prot  Length:85

    Alignment length:65
                                    28        38        48        58        68        78     
            SCXA_LEIQH   19 SVRDAYIAKNYNCVYECFRDAYCNELCTKNGASSGYCQWAGKYGNACWCYALPDNVPIRVPGKCH 83
               SCOP domains d2atba_ A: automated matches                                      SCOP domains
               CATH domains 2atbA00 A:1-65  [code=3.30.30.10, no name defined]                CATH domains
               Pfam domains ----------------------------------------------------------------- Pfam domains
         Sec.struct. author .eeeee............hhhhhhhhhhhh...eeeeeeee..eeeeeeeeee............ Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------- PROSITE
                 Transcript ----------------------------------------------------------------- Transcript
                  2atb A  1 MVRDAYIADDVNCVYECFRDAYCNELCTKNGASSGYCQWAGKYGNACWCYALPDNVPIRVPGKCR 65
                                    10        20        30        40        50        60     


Chain B from PDB  Type:PROTEIN  Length:65
 aligned with SCXA_LEIQH | P17728 from UniProtKB/Swiss-Prot  Length:85

    Alignment length:65
                                    28        38        48        58        68        78     
            SCXA_LEIQH   19 SVRDAYIAKNYNCVYECFRDAYCNELCTKNGASSGYCQWAGKYGNACWCYALPDNVPIRVPGKCH 83
               SCOP domains d2atbb_ B: automated matches                                      SCOP domains
               CATH domains 2atbB00 B:1-65  [code=3.30.30.10, no name defined]                CATH domains
               Pfam domains ----------------------------------------------------------------- Pfam domains
         Sec.struct. author .eeeee............hhhhhhhhhhhh...eeeeeeee..eeeeeeeeee............ Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------- PROSITE
                 Transcript ----------------------------------------------------------------- Transcript
                  2atb B  1 MVRDAYIADDVNCVYECFRDAYCNELCTKNGASSGYCQWAGKYGNACWCYALPDNVPIRVPGKCR 65
                                    10        20        30        40        50        60
   Legend:   → Mismatch (orange background)
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  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  (0, 0)

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

(-) Gene Ontology  (3, 3)

Asymmetric Unit(hide GO term definitions)
Chain A,B   (SCXA_LEIQH | P17728)
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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 Related Entries

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

UniProtKB/Swiss-Prot
        SCXA_LEIQH | P17728: 1lqh 1lqi 2asc 2yeo

(-) Related Entries Specified in the PDB File

1lqh INSECTICIDAL SCORPION TOXIN ISOLATED FROM THE VENOM OF SCORPION LEIURUS QUINQUESTRIATIS HEBRAEUS, STRUCTURE SOLVED BY NMR
2asc THE SAME PROTEIN COMPLEXED WITH DRUG