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(-) Description

Title :  CRYSTAL STRUCTURE OF AN ASN TO ALA MUTANT OF WINGED BEAN CHYMOTRYPSIN INHIBITOR PROTEIN
 
Authors :  J. K. Dattagupta, U. Sen, J. Dasgupta, S. Khamrui
Date :  27 Oct 05  (Deposition) - 13 Jun 06  (Release) - 13 Jul 11  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.10
Chains :  Asym. Unit :  A
Biol. Unit 1:  A  (1x)
Biol. Unit 2:  A  (2x)
Keywords :  Beta Trefoil, Mutation, Scaffold, Hydrolase Inhibitor (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  J. Dasgupta, S. Khamrui, J. K. Dattagupta, U. Sen
Spacer Asn Determines The Fate Of Kunitz (Sti) Inhibitors, As Revealed By Structural And Biochemical Studies On Wci Mutants.
Biochemistry V. 45 6783 2006
PubMed-ID: 16734415  |  Reference-DOI: 10.1021/BI060374Q
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - CHYMOTRYPSIN INHIBITOR 3
    Chains: A
    Engineered: YES
    Expression System: ESCHERICHIA COLI BL21(DE3)
    Expression System Strain: BL21 (DE3)
    Expression System Taxid: 469008
    Expression System Vector Type: PET28A+
    Mutation: YES
    Organism Common: WINGED BEAN
    Organism Scientific: PSOPHOCARPUS TETRAGONOLOBUS
    Organism Taxid: 3891
    Synonym: WCI-3

 Structural Features

(-) Chains, Units

  1
Asymmetric Unit : A
Biological Unit 1 (1x): A
Biological Unit 2 (2x): A

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (2, 2)

Asymmetric Unit (2, 2)
No.NameCountTypeFull Name
1NI1Ligand/IonNICKEL (II) ION
2SO41Ligand/IonSULFATE ION
Biological Unit 1 (1, 1)
No.NameCountTypeFull Name
1NI-1Ligand/IonNICKEL (II) ION
2SO41Ligand/IonSULFATE ION
Biological Unit 2 (1, 2)
No.NameCountTypeFull Name
1NI-1Ligand/IonNICKEL (II) ION
2SO42Ligand/IonSULFATE ION

(-) Sites  (2, 2)

Asymmetric Unit (2, 2)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREHIS A:26 , HIS A:127 , GLU A:172 , HOH A:230BINDING SITE FOR RESIDUE NI A 196
2AC2SOFTWAREHIS A:26 , SER A:128 , ASN A:129 , ILE A:130 , HOH A:243BINDING SITE FOR RESIDUE SO4 A 197

(-) SS Bonds  (2, 2)

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

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 2ET2)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 2ET2)

(-) PROSITE Motifs  (1, 1)

Asymmetric Unit (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1SOYBEAN_KUNITZPS00283 Soybean trypsin inhibitor (Kunitz) protease inhibitors family signature.ICW3_PSOTE28-44  1A:7-23
Biological Unit 1 (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1SOYBEAN_KUNITZPS00283 Soybean trypsin inhibitor (Kunitz) protease inhibitors family signature.ICW3_PSOTE28-44  1A:7-23
Biological Unit 2 (1, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1SOYBEAN_KUNITZPS00283 Soybean trypsin inhibitor (Kunitz) protease inhibitors family signature.ICW3_PSOTE28-44  2A:7-23

(-) Exons   (0, 0)

(no "Exon" information available for 2ET2)

(-) Sequences/Alignments

Asymmetric 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
(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:175
 aligned with ICW3_PSOTE | P10822 from UniProtKB/Swiss-Prot  Length:207

    Alignment length:175
                                    34        44        54        64        74        84        94       104       114       124       134       144       154       164       174       184       194     
           ICW3_PSOTE    25 DDDLVDAEGNLVENGGTYYLLPHIWAHGGGIETAKTGNEPCPLTVVRSPNEVSKGEPIRISSQFLSLFIPRGSLVALGFANPPSCAASPWWTVVDSPQGPAVKLSQQKLPEKDILVFKFEKVSHSNIHVYKLLYCQHDEEDVKCDQYIGIHRDRNGNRRLVVTEENPLELVLLKA 199
               SCOP domains d2et2a_ A: automated matches                                                                                                                                                    SCOP domains
               CATH domains 2et2A00 A:4-178  [code=2.80.10.50, no name defined]                                                                                                                             CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ................eeeee..hhhhh..eeee.........eeee..........eeeee............eeeee............eee......eee......hhhhhh.eeeee........eeeeeee......eeeeeeeeee.....eeeee......eeeeee. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---SOYBEAN_KUNITZ   ----------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2et2 A   4 DDDLVDAEGNLVEAGGTYYLLPHIWAHGGGIETAKTGNEPCPLTVVRSPNEVSKGEPIRISSQFLSLFIPRGSLVALGFANPPSCAASPWWTVVDSPQGPAVKLSQQKLPEKDILVFKFEKVSHSNIHVYKLLYCQHDEEDVKCDQYIGIHRDRNGNRRLVVTEENPLELVLLKA 178
                                    13        23        33        43        53        63        73        83        93       103       113       123       133       143       153       163       173
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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 Unit
(-)
Class: All beta proteins (24004)

(-) CATH Domains  (1, 1)

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

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 2ET2)

(-) Gene Ontology  (5, 5)

Asymmetric 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 | P10822: 1eyl 1fmz 1fn0 1wbc 1xg6 2bea 2beb 2esu 2qyi 2wbc 3i29 3i2a 3i2x 3qyd 3veq 4h9w 4ha2 4tlp 4wbc

(-) Related Entries Specified in the PDB File

1eyl THE SAME PROTEIN WITH NO MUTATION
1fmz WILD TYPE PROTEIN
2esu CRYSTAL STRUCTURE OF ASN TO GLN NUATANT OF WINGED BEAN CHYMOTRYPSIN INHIBITOR PROTEIN