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(-) Description

Title :  SOLUTION STRUCTURE OF THE RIBBON DISULFIDE BOND ISOMER OF ALPHA-CONOTOXIN AUIB
 
Authors :  J. L. Dutton, P. S. Bansal, R. C. Hogg, D. J. Adams, P. F. Alewood, D. J. Craik
Date :  03 Oct 02  (Deposition) - 30 Dec 02  (Release) - 24 Feb 09  (Revision)
Method :  SOLUTION NMR
Resolution :  NOT APPLICABLE
Chains :  NMR Structure  :  A  (20x)
Keywords :  Turns, Toxin (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  J. L. Dutton, P. S. Bansal, R. C. Hogg, D. J. Adams, P. F. Alewood, D. J. Craik
A New Level Of Conotoxin Diversity, A Non-Native Disulfide Bond Connectivity In Alpha -Conotoxin Auib Reduces Structural Definition But Increases Biological Activity.
J. Biol. Chem. V. 277 48849 2002
PubMed-ID: 12376538  |  Reference-DOI: 10.1074/JBC.M208842200
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - ALPHA-CONOTOXIN AUIB
    ChainsA
    EngineeredYES
    Other DetailsTHE PEPTIDE WAS SYNTHESISED BY BOC CHEMISTRY.
    SyntheticYES

 Structural Features

(-) Chains, Units

  
NMR Structure (20x)

Summary Information (see also Sequences/Alignments below)

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

NMR Structure (1, 1)
No.NameCountTypeFull Name
1NH21Mod. Amino AcidAMINO GROUP

(-) Sites  (1, 1)

NMR Structure (1, 1)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREPHE A:9 , CYS A:15BINDING SITE FOR RESIDUE NH2 A 16

(-) SS Bonds  (2, 2)

NMR Structure
No.Residues
1A:2 -A:15
2A:3 -A:8

(-) Cis Peptide Bonds  (0, 0)

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

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (1, 1)

NMR Structure (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1ALPHA_CONOTOXINPS60014 Alpha-conotoxin family signature.CA1B_CONAL41-54  1A:2-15

(-) Exons   (0, 0)

(no "Exon" information available for 1MXP)

(-) 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:16
 aligned with CA1B_CONAL | P56640 from UniProtKB/Swiss-Prot  Length:58

    Alignment length:16
                                    49      
            CA1B_CONAL   40 GCCSYPPCFATNPDCG 55
               SCOP domains d1mxpa_ A:       SCOP domains
               CATH domains ---------------- CATH domains
               Pfam domains ---------------- Pfam domains
         Sec.struct. author ................ Sec.struct. author
                 SAPs(SNPs) ---------------- SAPs(SNPs)
                    PROSITE -ALPHA_CONOTOXI- PROSITE
                 Transcript ---------------- Transcript
                  1mxp A  1 GCCSYPPCFATNPDCx 16
                                    10     |
                                          16-NH2

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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: Peptides (792)

(-) CATH Domains  (0, 0)

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

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 1MXP)

(-) Gene Ontology  (5, 5)

NMR Structure(hide GO term definitions)
Chain A   (CA1B_CONAL | P56640)
molecular function
    GO:0030550    acetylcholine receptor inhibitor activity    Interacting (directly or indirectly) with acetylcholine receptors such that the proportion of receptors in the active form is decreased.
biological process
    GO:2000272    negative regulation of receptor activity    Any process that stops, prevents or reduces the frequency, rate or extent of receptor activity.
    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:0035792    other organism postsynaptic membrane    A postsynaptic membrane that is part of another organism, i.e. a secondary organism with which the first organism is interacting. A postsynaptic membrane is a specialized area of membrane facing the presynaptic membrane on the tip of the nerve ending and separated from it by a minute cleft (the synaptic cleft). Neurotransmitters transmit the signal across the synaptic cleft to the postsynaptic membrane.

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 Related Entries

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

UniProtKB/Swiss-Prot
        CA1B_CONAL | P566401dg2 1mxn

(-) Related Entries Specified in the PDB File

1mxn 1MXN CONTAINS SOLUTION STRUCTURE OF THE SAME PROTEIN WITH NATIVE DISULFIDE BOND CONNECTIVITY