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(-) Description

Title :  REFINED CRYSTAL STRUCTURE (2.3 ANGSTROM) OF A WINGED BEAN CHYMOTRYPSIN INHIBITOR AND LOCATION OF ITS SECOND REACTIVE SITE
 
Authors :  J. K. Dattagupta, A. Podder, C. Chakrabarti, U. Sen, D. Mukhopadhyay, S. K. Dutta, M. Singh
Date :  26 Nov 97  (Deposition) - 25 Feb 98  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.30
Chains :  Asym./Biol. Unit :  A
Keywords :  Serine Protease Inhibitor (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  J. K. Dattagupta, A. Podder, C. Chakrabarti, U. Sen, D. Mukhopadhyay, S. K. Dutta, M. Singh
Refined Crystal Structure (2. 3 A) Of A Double-Headed Winged Bean Alpha-Chymotrypsin Inhibitor And Location Of Its Second Reactive Site.
Proteins V. 35 321 1999 (for further references see the PDB file header)

(-) Compounds

Molecule 1 - CHYMOTRYPSIN INHIBITOR
    Chains: A
    Organism Common: WINGED BEAN
    Organism Scientific: PSOPHOCARPUS TETRAGONOLOBUS
    Organism Taxid: 3891
    Synonym: WCI
    Tissue: SEED

 Structural Features

(-) Chains, Units

  1
Asymmetric/Biological Unit : A

Summary Information (see also Sequences/Alignments below)

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

(no "Ligand,Modified Residues,Ions" information available for 2WBC)

(-) Sites  (2, 2)

Asymmetric Unit (2, 2)
No.NameEvidenceResiduesDescription
11STUNKNOWNSER A:62 , GLN A:63 , PHE A:64 , LEU A:65 , SER A:66 , LEU A:67 , PHE A:68 , ILE A:69THIS IS THE FIRST REACTIVE SITE OF THE CHYMOTRYPSIN INHIBITOR PROTEIN.
22NDUNKNOWNGLY A:37 , ASN A:38 , GLU A:39 , PRO A:40 , CYS A:41 , PRO A:42 , LEU A:43 , THR A:44THIS IS THE SECOND REACTIVE SITE OF THE CHYMOTRYPSIN INHIBITOR PROTEIN.

(-) SS Bonds  (2, 2)

Asymmetric/Biological Unit
No.Residues
1A:41 -A:85
2A:135 -A:144

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 2WBC)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 2WBC)

(-) PROSITE Motifs  (1, 1)

Asymmetric/Biological Unit (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1SOYBEAN_KUNITZPS00283 Soybean trypsin inhibitor (Kunitz) protease inhibitors family signature.ICW3_PSOTE28-44  1A:4-20

(-) Exons   (0, 0)

(no "Exon" information available for 2WBC)

(-) 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    
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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:183
 aligned with ICW3_PSOTE | P10822 from UniProtKB/Swiss-Prot  Length:207

    Alignment length:183
                                    34        44        54        64        74        84        94       104       114       124       134       144       154       164       174       184       194       204   
           ICW3_PSOTE    25 DDDLVDAEGNLVENGGTYYLLPHIWAHGGGIETAKTGNEPCPLTVVRSPNEVSKGEPIRISSQFLSLFIPRGSLVALGFANPPSCAASPWWTVVDSPQGPAVKLSQQKLPEKDILVFKFEKVSHSNIHVYKLLYCQHDEEDVKCDQYIGIHRDRNGNRRLVVTEENPLELVLLKAKSETASSH 207
               SCOP domains d2wbca_ A: chymotrypsin inhibitor WCI                                                                                                                                                   SCOP domains
               CATH domains 2wbcA00 A:1-183  [code=2.80.10.50, no name defined]                                                                                                                                     CATH domains
               Pfam domains --Kunitz_legume-2wbcA01 A:3-174                                                                                                                                               --------- Pfam domains
         Sec.struct. author ................eeeeeee.hhh..eeeee........eeeee.........eeeeee...........eeeeeee..........eeeee.....eeee......hhhhh.eeeeee.......eeeeeeee....eeeeeeeeeeee....eeeeee.....eeeeee......... Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---SOYBEAN_KUNITZ   ------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2wbc A   1 DDDLVDAEGNLVENGGTYYLLPHIWAHGGGIETAKTGNEPCPLTVVRSPNEVSKGEPIRISSQFLSLFIPRGSLVALGFANPPSCAASPWWTVVDSPQGPAVKLSQQKLPEKDILVFKFEKVSHSNIHVYKLLYCQHDEEDVKCDQYIGIHRDRNGNRRLVVTEENPLELVLLKAKSETASSH 183
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180
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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)

Asymmetric/Biological Unit
(-)
Class: All beta proteins (24004)

(-) CATH Domains  (1, 1)

Asymmetric/Biological Unit
(-)
Class: Mainly Beta (13760)

(-) Pfam Domains  (1, 1)

Asymmetric/Biological Unit
(-)
Clan: Trefoil (131)

(-) Gene Ontology  (5, 5)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A   (ICW3_PSOTE | P10822)
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.

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 Related Entries

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UniProtKB/Swiss-Prot
        ICW3_PSOTE | P10822: 1eyl 1fmz 1fn0 1wbc 1xg6 2bea 2beb 2esu 2et2 2qyi 3i29 3i2a 3i2x 3qyd 3veq 4h9w 4ha2 4tlp 4wbc

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