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(-) Description

Title :  ALPHA-CONOTOXIN PNIB FROM CONUS PENNACEUS
 
Authors :  S. -H. Hu, J. L. Martin
Date :  18 May 97  (Deposition) - 20 May 98  (Release) - 10 Jun 15  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  1.10
Chains :  Asym./Biol. Unit :  A
Keywords :  Acetylcholine Receptor Antagonist, Alpha-Conotoxin (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  S. H. Hu, J. Gehrmann, P. F. Alewood, D. J. Craik, J. L. Martin
Crystal Structure At 1. 1 A Resolution Of Alpha-Conotoxin Pnib: Comparison With Alpha-Conotoxins Pnia And Gi.
Biochemistry V. 36 11323 1997
PubMed-ID: 9298951  |  Reference-DOI: 10.1021/BI9713052
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - ALPHA-CONOTOXIN PNIB
    ChainsA
    EngineeredYES
    Organism ScientificCONUS PENNACEUS
    Organism Taxid37335
    Other DetailsBIOLOGICALLY ACTIVE MOLECULE
    SyntheticYES

 Structural Features

(-) Chains, Units

  1
Asymmetric/Biological Unit A

Summary Information (see also Sequences/Alignments below)

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

Asymmetric/Biological Unit (1, 1)
No.NameCountTypeFull Name
1NH21Mod. Amino AcidAMINO GROUP

(-) Sites  (1, 1)

Asymmetric Unit (1, 1)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREPRO A:13 , CYS A:16 , HOH A:29BINDING SITE FOR RESIDUE NH2 A 17

(-) SS Bonds  (2, 2)

Asymmetric/Biological Unit
No.Residues
1A:2 -A:8
2A:3 -A:16

(-) Cis Peptide Bonds  (0, 0)

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

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (1, 1)

Asymmetric/Biological Unit (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1ALPHA_CONOTOXINPS60014 Alpha-conotoxin family signature.CA1B_CONPE46-60  1A:2-16

(-) Exons   (0, 0)

(no "Exon" information available for 1AKG)

(-) Sequences/Alignments

Asymmetric/Biological 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
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Chain A from PDB  Type:PROTEIN  Length:17
 aligned with CA1B_CONPE | P50985 from UniProtKB/Swiss-Prot  Length:61

    Alignment length:17
                                    54       
            CA1B_CONPE   45 GCCSLPPCALSNPDYCG 61
               SCOP domains d1akga_ A:        SCOP domains
               CATH domains ----------------- CATH domains
               Pfam domains ----------------- Pfam domains
         Sec.struct. author ....hhhhhhhh..... Sec.struct. author
                 SAPs(SNPs) ----------------- SAPs(SNPs)
                    PROSITE -ALPHA_CONOTOXIN- PROSITE
                 Transcript ----------------- Transcript
                  1akg A  1 GCCSLPPCALSNPDYCx 17
                                    10      |
                                           17-NH2

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 Classification and Annotation

(-) SCOP Domains  (1, 1)

Asymmetric/Biological Unit
(-)
Class: Peptides (792)

(-) CATH Domains  (0, 0)

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

(-) Pfam Domains  (0, 0)

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

(-) Gene Ontology  (5, 5)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A   (CA1B_CONPE | P50985)
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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