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(-) Description

Title :  THE CYCLIC PEPTIDE CONTRYPHAN-R FROM CONUS RADIATUS
 
Authors :  P. K. Pallaghy, A. P. Melnikova, E. C. Jimenez, B. M. Olivera, R. S. Norton
Date :  08 Apr 99  (Deposition) - 29 Sep 99  (Release) - 24 Feb 09  (Revision)
Method :  SOLUTION NMR
Resolution :  NOT APPLICABLE
Chains :  NMR Structure  :  A  (20x)
Keywords :  Cyclic Peptide, Disulfide Bridge, D-Configuration, Conus Peptide, Stiff-Tail Syndrome, Venom Duct Peptide, Toxin (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  P. K. Pallaghy, A. P. Melnikova, E. C. Jimenez, B. M. Olivera, R. S. Norton
Solution Structure Of Contryphan-R, A Naturally Occurring Disulfide-Bridged Octapeptide Containing D-Tryptophan: Comparison With Protein Loops.
Biochemistry V. 38 11553 1999
PubMed-ID: 10471307  |  Reference-DOI: 10.1021/BI990685J
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - PROTEIN (CONTRYPHAN-R)
    Chains: A
    Engineered: YES
    Other Details: HYDROXYPROLINE AT POSITION 3 (HYP), D- CONFIGURED TRP AT POSITION 4 (TPD), C- TERMINALLY AMIDATED
    Other Details - Source: THIS PEPTIDE WAS CHEMICALLY SYNTHESIZED. THE SEQUENCE OF THIS PEPTIDE IS NATURALLY FOUND IN THE VENOM DUCT OF CONUS RADIATUS (CONE SHELL).
    Synonym: CONTRYPHAN
    Synthetic: YES

 Structural Features

(-) Chains, Units

  
NMR Structure (20x): 

Summary Information (see also Sequences/Alignments below)

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

NMR Structure (3, 3)
No.NameCountTypeFull Name
1DTR1Mod. Amino AcidD-TRYPTOPHAN
2HYP1Mod. Amino Acid4-HYDROXYPROLINE
3NH21Mod. Amino AcidAMINO GROUP

(-) Sites  (1, 1)

NMR Structure (1, 1)
No.NameEvidenceResiduesDescription
1AC1SOFTWARETRP A:7 , CYS A:8BINDING SITE FOR RESIDUE NH2 A 9

(-) SS Bonds  (1, 1)

NMR Structure
No.Residues
1A:2 -A:8

(-) Cis Peptide Bonds  (1, 20)

NMR Structure
No.ModelResidues
11, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20Cys A:2 -Hyp A:3

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (1, 1)

NMR Structure (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1CONTRYPHANPS60027 Contryphan family signature.COW_CONRA56-63  1A:2-8

(-) Exons   (0, 0)

(no "Exon" information available for 1QFB)

(-) 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:9
 aligned with COW_CONRA | P58786 from UniProtKB/Swiss-Prot  Length:63

    Alignment length:9
             COW_CONRA   55 GCPWEPWCG 63
               SCOP domains d1qfba_   SCOP domains
               CATH domains --------- CATH domains
               Pfam domains Conotoxi- Pfam domains
         Sec.struct. author ......... Sec.struct. author
                 SAPs(SNPs) --------- SAPs(SNPs)
                    PROSITE -CONTRYPH PROSITE
                 Transcript --------- Transcript
                  1qfb A  1 GCpxEPWCx  9
                              ||    |
                              ||    |
                              3-HYP |
                               4-DTR|
                                    9-NH2
   Legend:   → Mismatch (orange background)
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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 1QFB)

(-) Pfam Domains  (1, 1)

NMR Structure
(-)
Clan: Omega_toxin (34)

(-) Gene Ontology  (3, 3)

NMR Structure(hide GO term definitions)
Chain A   (COW_CONRA | P58786)
molecular function
    GO:0008200    ion channel inhibitor activity    Stops, prevents, or reduces the activity of an ion channel.
biological process
    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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UniProtKB/Swiss-Prot
        COW_CONRA | P58786: 1dg0

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