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(-) Description

Title :  X-RAY STRUCTURE OF KALIOTOXIN BY RACEMIC PROTEIN CRYSTALLOGRAPHY
 
Authors :  B. L. Pentelute, K. Mandal, Z. P. Gates, M. R. Sawaya, T. O. Yeates, S. B. H
Date :  11 Aug 10  (Deposition) - 20 Oct 10  (Release) - 28 Mar 12  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  0.95
Chains :  Asym. Unit :  A,B
Biol. Unit 1:  A  (1x)
Biol. Unit 2:  B  (1x)
Keywords :  Racemic Protein, Direct Methods, Toxin, Chemical Synthesis (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  B. L. Pentelute, K. Mandal, Z. P. Gates, M. R. Sawaya, T. O. Yeates, S. B. Kent
Total Chemical Synthesis And X-Ray Structure Of Kaliotoxin By Racemic Protein Crystallography.
Chem. Commun. (Camb. ) V. 46 8174 2010
PubMed-ID: 20877851  |  Reference-DOI: 10.1039/C0CC03148H

(-) Compounds

Molecule 1 - POTASSIUM CHANNEL TOXIN ALPHA-KTX 3.1
    Chains: A, B
    Engineered: YES
    Fragment: L-KALIOTOXIN
    Organism Common: SCORPION
    Organism Scientific: ANDROCTONUS MAURETANICUS MAURETANICUS
    Organism Taxid: 6860
    Other Details: CHEMICAL SYNTHESIS
    Synonym: KALIOTOXIN-1, KTX-1
    Synthetic: YES

 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  (2, 4)

Asymmetric Unit (2, 4)
No.NameCountTypeFull Name
1CIT2Ligand/IonCITRIC ACID
2TFA2Ligand/IonTRIFLUOROACETIC ACID
Biological Unit 1 (1, 1)
No.NameCountTypeFull Name
1CIT-1Ligand/IonCITRIC ACID
2TFA1Ligand/IonTRIFLUOROACETIC ACID
Biological Unit 2 (2, 3)
No.NameCountTypeFull Name
1CIT2Ligand/IonCITRIC ACID
2TFA1Ligand/IonTRIFLUOROACETIC ACID

(-) Sites  (4, 4)

Asymmetric Unit (4, 4)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREGLY A:1 , GLY A:26 , LYS A:27 , MET A:29 , HIS A:34 , THR A:36 , HOH A:55 , HOH A:60BINDING SITE FOR RESIDUE TFA A 39
2AC2SOFTWAREGLY B:1 , LYS B:27 , MET B:29 , HIS B:34 , HOH B:54 , HOH B:59BINDING SITE FOR RESIDUE TFA B 39
3AC3SOFTWARESER B:9 , GLN B:13 , ARG B:24 , HOH B:46 , HOH B:48 , HOH B:56 , HOH B:77BINDING SITE FOR RESIDUE CIT B 40
4AC4SOFTWARELYS A:27 , LYS B:19 , ARG B:24 , LYS B:38 , HOH B:83BINDING SITE FOR RESIDUE CIT B 41

(-) SS Bonds  (6, 6)

Asymmetric Unit
No.Residues
1A:8 -A:28
2A:14 -A:33
3A:18 -A:35
4B:8 -B:28
5B:14 -B:33
6B:18 -B:35

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 3ODV)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 3ODV)

(-) PROSITE Motifs  (1, 2)

Asymmetric Unit (1, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1SCORP_SHORT_TOXINPS01138 Scorpion short toxins signature.KAX31_ANDMA14-35
 		  2A:14-35
B:14-35
Biological Unit 1 (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1SCORP_SHORT_TOXINPS01138 Scorpion short toxins signature.KAX31_ANDMA14-35
 		  1A:14-35
-
Biological Unit 2 (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1SCORP_SHORT_TOXINPS01138 Scorpion short toxins signature.KAX31_ANDMA14-35
 		  1-
B:14-35

(-) Exons   (0, 0)

(no "Exon" information available for 3ODV)

(-) 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:38
 aligned with KAX31_ANDMA | P24662 from UniProtKB/Swiss-Prot  Length:38

    Alignment length:38
                                    10        20        30        
           KAX31_ANDMA    1 GVEINVKCSGSPQCLKPCKDAGMRFGKCMNRKCHCTPK 38
               SCOP domains -------------------------------------- SCOP domains
               CATH domains -------------------------------------- CATH domains
               Pfam domains -------------------------------------- Pfam domains
         Sec.struct. author .eeeeee..hhhhhhhhhhhh....eeee..eeee... Sec.struct. author
                 SAPs(SNPs) -------------------------------------- SAPs(SNPs)
                    PROSITE -------------SCORP_SHORT_TOXIN     --- PROSITE
                 Transcript -------------------------------------- Transcript
                  3odv A  1 GVEINVKCSGSPQCLKPCKDAGMRFGKCMNRKCHCTPK 38
                                    10        20        30        


Chain B from PDB  Type:PROTEIN  Length:38
 aligned with KAX31_ANDMA | P24662 from UniProtKB/Swiss-Prot  Length:38

    Alignment length:38
                                    10        20        30        
           KAX31_ANDMA    1 GVEINVKCSGSPQCLKPCKDAGMRFGKCMNRKCHCTPK 38
               SCOP domains -------------------------------------- SCOP domains
               CATH domains -------------------------------------- CATH domains
           Pfam domains (1) -----Toxin_2-3odvB01 B:6-36         -- Pfam domains (1)
           Pfam domains (2) -----Toxin_2-3odvB02 B:6-36         -- Pfam domains (2)
         Sec.struct. author .eeeeee..hhhhhhhhhhhh..eeeeee..eeeee.. Sec.struct. author
                 SAPs(SNPs) -------------------------------------- SAPs(SNPs)
                    PROSITE -------------SCORP_SHORT_TOXIN     --- PROSITE
                 Transcript -------------------------------------- Transcript
                  3odv B  1 GVEINVKCSGSPQCLKPCKDAGMRFGKCMNRKCHCTPK 38
                                    10        20        30
   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  (0, 0)

(no "SCOP Domain" information available for 3ODV)

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 3ODV)

(-) Pfam Domains  (1, 2)

Asymmetric Unit
(-)
Clan: Knottin_1 (78)

(-) Gene Ontology  (4, 4)

Asymmetric Unit(hide GO term definitions)
Chain A,B   (KAX31_ANDMA | P24662)
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

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        KAX31_ANDMA | P24662: 1ktx 1xsw 2ktx 2uvs

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