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(-) Description

Title :  SOLUTION STRUCTURE OF THE SQUASH TRYPSIN INHIBITOR MCOTI-II, NMR, 30 STRUCTURES.
 
Authors :  A. Heitz, J. -F. Hernandez, J. Gagnon, T. T. Hong, T. T. C. Pham, T. M. Nguyen, D. Le-Nguyen, L. Chiche
Date :  02 Apr 01  (Deposition) - 12 Apr 01  (Release) - 24 Feb 09  (Revision)
Method :  SOLUTION NMR
Resolution :  NOT APPLICABLE
Chains :  NMR Structure  :  A  (30x)
Keywords :  Protease Inhibitor, Plant Protein, Cyclic Knottin, Backbone Cyclic, 3-10 Helix, Triple- Stranded Anti-Parallel Beta-Sheet (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  A. Heitz, J. -F. Hernandez, J. Gagnon, T. T. Hong, T. T. C. Pham, T. M. Nguyen, D. Le-Nguyen, L. Chiche
Solution Structure Of The Squash Trypsin Inhibitor Mcoti-Ii. A New Family For Cyclic Knottins
Biochemistry V. 40 7973 2001
PubMed-ID: 11434766  |  Reference-DOI: 10.1021/BI0106639

(-) Compounds

Molecule 1 - TRYPSIN INHIBITOR II
    Chains: A
    Organism Scientific: MOMORDICA COCHINCHINENSIS
    Organism Taxid: 3674
    Other Details: SQUASH TRYPSIN INHIBITOR
    Other Details - Source: SEEDS
    Synonym: MCOTI-II

 Structural Features

(-) Chains, Units

  
NMR Structure (30x): 

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (0, 0)

(no "Ligand,Modified Residues,Ions" information available for 1HA9)

(-) Sites  (0, 0)

(no "Site" information available for 1HA9)

(-) SS Bonds  (3, 3)

NMR Structure
No.Residues
1A:8 -A:25
2A:15 -A:27
3A:21 -A:33

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 1HA9)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 1HA9)

(-) PROSITE Motifs  (1, 1)

NMR Structure (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1SQUASH_INHIBITORPS00286 Squash family of serine protease inhibitors signature.ITR2_MOMCO8-27  1A:8-27

(-) Exons   (0, 0)

(no "Exon" information available for 1HA9)

(-) 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:34
 aligned with ITR2_MOMCO | P82409 from UniProtKB/Swiss-Prot  Length:34

    Alignment length:34
                                    10        20        30    
            ITR2_MOMCO    1 SGSDGGVCPKILKKCRRDSDCPGACICRGNGYCG 34
               SCOP domains d1ha9a_ A: Trypsin inhibitor       SCOP domains
               CATH domains ---------------------------------- CATH domains
               Pfam domains ---------------------------------- Pfam domains
         Sec.struct. author ............eee.hhhhh....eee..eeee Sec.struct. author
                 SAPs(SNPs) ---------------------------------- SAPs(SNPs)
                    PROSITE -------SQUASH_INHIBITOR    ------- PROSITE
                 Transcript ---------------------------------- Transcript
                  1ha9 A  1 SGSDGGVCPKILKKCRRDSDCPGACICRGNGYCG 34
                                    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  (1, 1)

NMR Structure
(-)
Class: Small proteins (3458)

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 1HA9)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 1HA9)

(-) Gene Ontology  (6, 6)

NMR Structure(hide GO term definitions)
Chain A   (ITR2_MOMCO | P82409)
molecular function
    GO:0004866    endopeptidase inhibitor activity    Stops, prevents or reduces the activity of an endopeptidase, any enzyme that hydrolyzes nonterminal peptide bonds in polypeptides.
    GO:0030414    peptidase inhibitor activity    Stops, prevents or reduces the activity of a peptidase, any enzyme that catalyzes the hydrolysis peptide bonds.
    GO:0004867    serine-type endopeptidase inhibitor activity    Stops, prevents or reduces the activity of serine-type endopeptidases, enzymes that catalyze the hydrolysis of nonterminal peptide bonds in a polypeptide chain; a serine residue (and a histidine residue) are at the active center of the enzyme.
biological process
    GO:0010951    negative regulation of endopeptidase activity    Any process that decreases the frequency, rate or extent of endopeptidase activity, the endohydrolysis of peptide bonds within proteins.
    GO:0010466    negative regulation of peptidase activity    Any process that stops or reduces the rate of peptidase activity, the hydrolysis of peptide bonds within proteins.
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

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

UniProtKB/Swiss-Prot
        ITR2_MOMCO | P82409: 1ib9 2c4b 2it8 2mt8 2po8 4gux

(-) Related Entries Specified in the PDB File

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