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(-) Description

Title :  THE CRYSTAL STRUCTURE OF THE P1 MUTANT (LEU TO ARG)OF A WINGED BEAN CHYMOTRYPSIN INHIBITOR(KUNITZ)SOLVED AT 2.15A RESOLUTION
 
Authors :  U. Sen, J. K. Dattagupta, J. Dasgupta, S. Khamrui
Date :  16 Sep 04  (Deposition) - 30 Aug 05  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.15
Chains :  Asym./Biol. Unit :  A
Keywords :  Trypsin Inhibitor, Hydrolase Inhibitor (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  S. Khamrui, J. Dasgupta, J. K. Dattagupta, U. Sen
Single Mutation At P1 Of A Chymotrypsin Inhibitor Changes It To A Trypsin Inhibitor: X-Ray Structural (2. 15 A) And Biochemical Basis
Biochim. Biophys. Acta V. 1752 65 2005
PubMed-ID: 16081330  |  Reference-DOI: 10.1016/J.BBAPAP.2005.06.012
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - CHYMOTRYPSIN INHIBITOR 3
    ChainsA
    EngineeredYES
    Expression SystemESCHERICHIA COLI
    Expression System PlasmidPET28A+
    Expression System Taxid562
    Expression System Vector TypePLASMID
    MutationYES
    Organism CommonWINGED BEAN
    Organism ScientificPSOPHOCARPUS TETRAGONOLOBUS
    Organism Taxid3891
    SynonymWINGED BEAN CHYMOTRYPSIN INHIBITOR, WCI-3

 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 1XG6)

(-) Sites  (0, 0)

(no "Site" information available for 1XG6)

(-) SS Bonds  (2, 2)

Asymmetric/Biological Unit
No.Residues
1A:44 -A:88
2A:138 -A:147

(-) Cis Peptide Bonds  (0, 0)

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 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 1XG6)

(-) 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:7-23

(-) Exons   (0, 0)

(no "Exon" information available for 1XG6)

(-) 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
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Chain A from PDB  Type:PROTEIN  Length:179
 aligned with ICW3_PSOTE | P10822 from UniProtKB/Swiss-Prot  Length:207

    Alignment length:179
                                    30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190         
           ICW3_PSOTE    21 SSTADDDLVDAEGNLVENGGTYYLLPHIWAHGGGIETAKTGNEPCPLTVVRSPNEVSKGEPIRISSQFLSLFIPRGSLVALGFANPPSCAASPWWTVVDSPQGPAVKLSQQKLPEKDILVFKFEKVSHSNIHVYKLLYCQHDEEDVKCDQYIGIHRDRNGNRRLVVTEENPLELVLLKA 199
               SCOP domains d1xg6a_ A: automated matches                                                                                                                                                        SCOP domains
               CATH domains 1xg6A00 A:0-178  [code=2.80.10.50, no name defined]                                                                                                                                 CATH domains
               Pfam domains ------Kunitz_legume-1xg6A01 A:6-177                                                                                                                                               - Pfam domains
         Sec.struct. author ....................eeeeee.hhhhh..eeee.........eeee..........eeeee............eeeee............eee......eee......hhhhh..eeeee........eeeeeee......eeeeeeeeee.....eeeee.......eeeee. Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -------SOYBEAN_KUNITZ   ----------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1xg6 A   0 GSHMDDDLVDAEGNLVENGGTYYLLPHIWAHGGGIETAKTGNEPCPLTVVRSPNEVSKGEPIRISSQFRSLFIPRGSLVALGFANPPSCAASPWWTVVDSPQGPAVKLSQQKLPEKDILVFKFEKVSHSNIHVYKLLYCQHDEEDVKCDQYIGIHRDRNGNRRLVVTEENPLELVLLKA 178
                                     9        19        29        39        49        59        69        79        89        99       109       119       129       139       149       159       169         

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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

(-) 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

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

UniProtKB/Swiss-Prot
        ICW3_PSOTE | P108221eyl 1fmz 1fn0 1wbc 2bea 2beb 2esu 2et2 2qyi 2wbc 3i29 3i2a 3i2x 3qyd 3veq 4h9w 4ha2 4tlp 4wbc

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