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(-) Description

Title :  SOLUTION CONFORMATION OF ALPHA-CONOTOXIN PIA
 
Authors :  S. -W. Chi, S. -H. Lee, D. -H. Kim, J. -S. Kim, B. M. Olivera, J. M. Mcintosh, K. -H. Han
Date :  05 May 05  (Deposition) - 02 May 06  (Release) - 24 Feb 09  (Revision)
Method :  SOLUTION NMR
Resolution :  NOT APPLICABLE
Chains :  NMR Structure  :  A  (20x)
Keywords :  Alpha-Helix, Beta-Turn, Two Disulfide Bonds, C-Terminal Amidation, Toxin (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  S. -W. Chi, S. -H. Lee, D. -H. Kim, J. -S. Kim, B. M. Olivera, J. M. Mcintosh, K. -H. Han
Solution Structure Of Alpha-Conotoxin Pia, A Novel Antagonist Of Alpha6 Subunit Containing Nicotinic Acetylcholine Receptors
Biochem. Biophys. Res. Commun. V. 338 1990 2005
PubMed-ID: 16289101  |  Reference-DOI: 10.1016/J.BBRC.2005.10.176
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - ALPHA-CONOTOXIN PIA
    Chains: A
    Engineered: YES
    Other Details: THIS SEQUENCE OCCURS NATURALLY IN CONUS PURPURASCENS.
    Synonym: FRAGMENT
    Synthetic: YES

 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
1AC1SOFTWARECYS A:18BINDING SITE FOR RESIDUE NH2 A 19

(-) SS Bonds  (2, 2)

NMR Structure
No.Residues
1A:4 -A:10
2A:5 -A:18

(-) Cis Peptide Bonds  (0, 0)

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

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (1, 1)

NMR Structure (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1ALPHA_CONOTOXINPS60014 Alpha-conotoxin family signature.CA1A_CONPU25-39  1A:4-18

(-) Exons   (0, 0)

(no "Exon" information available for 1ZLC)

(-) 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:19
 aligned with CA1A_CONPU | P69658 from UniProtKB/Swiss-Prot  Length:40

    Alignment length:19
                                    31         
            CA1A_CONPU   22 RDPCCSNPVCTVHNPQICG 40
               SCOP domains ------------------- SCOP domains
               CATH domains ------------------- CATH domains
               Pfam domains Toxin_8-1zlcA01   - Pfam domains
         Sec.struct. author ........hhhhhh..... Sec.struct. author
                 SAPs(SNPs) ------------------- SAPs(SNPs)
                    PROSITE ---ALPHA_CONOTOXIN- PROSITE
                 Transcript ------------------- Transcript
                  1zlc A  1 RDPCCSNPVCTVHNPQICx 19
                                    10        |
                                             19-NH2
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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 1ZLC)

(-) CATH Domains  (0, 0)

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

(-) Pfam Domains  (1, 1)

NMR Structure
(-)
Clan: no clan defined [family: Toxin_8] (6)

(-) Gene Ontology  (5, 5)

NMR Structure(hide GO term definitions)
Chain A   (CA1A_CONPU | P69658)
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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