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(-) Description

Title :  CRYSTAL STRUCTURE OF A CHIMERIC TRYPSIN INHIBITOR HAVING REACTIVE SITE LOOP OF ETI ON THE SCAFFOLD OF WCI
 
Authors :  U. Sen, S. Khamrui, J. Dasgupta, J. K. Dattagupta, S. Majumder
Date :  30 Jun 09  (Deposition) - 02 Feb 10  (Release) - 05 May 10  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.85
Chains :  Asym. Unit :  A,B
Biol. Unit 1:  A  (1x)
Biol. Unit 2:  B  (1x)
Keywords :  Eti(L)-Wci(S), Mutant, Trypsin Inhibitor, Chimeric Protein, Serine Protease Inhibitor, Hydrolase/Hydrolase Inhibitor, Disulfide Bond, Protease Inhibitor, Hydrolase Inhibitor (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  S. Khamrui, S. Majumder, J. Dasgupta, J. K. Dattagupta, U. Sen
Identification Of A Novel Set Of Scaffolding Residues That Are Instrumental For The Inhibitory Property Of Kunitz (Sti) Inhibitors.
Protein Sci. V. 19 593 2010
PubMed-ID: 20073082  |  Reference-DOI: 10.1002/PRO.338

(-) Compounds

Molecule 1 - CHYMOTRYPSIN INHIBITOR 3
    Chains: A, B
    Engineered: YES
    Expression System: ESCHERICHIA COLI
    Expression System Plasmid: PET28A+
    Expression System Strain: BL21(DE3)
    Expression System Taxid: 562
    Expression System Vector Type: PLASMID
    Mutation: YES
    Organism Common: GOA BEAN
    Organism Scientific: PSOPHOCARPUS TETRAGONOLOBUS
    Organism Taxid: 3891
    Synonym: WCI-3

 Structural Features

(-) Chains, Units

  12
Asymmetric Unit : AB
Biological Unit 1 (1x): A 
Biological Unit 2 (1x):  B

Summary Information (see also Sequences/Alignments below)

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

(no "Ligand,Modified Residues,Ions" information available for 3I2X)

(-) Sites  (0, 0)

(no "Site" information available for 3I2X)

(-) SS Bonds  (4, 4)

Asymmetric Unit
No.Residues
1A:44 -A:88
2A:138 -A:147
3B:44 -B:88
4B:138 -B:147

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 3I2X)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 3I2X)

(-) PROSITE Motifs  (1, 2)

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

(-) Exons   (0, 0)

(no "Exon" information available for 3I2X)

(-) 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:178
 aligned with ICW3_PSOTE | P10822 from UniProtKB/Swiss-Prot  Length:207

    Alignment length:178
                                    33        43        53        63        73        83        93       103       113       123       133       143       153       163       173       183       193        
           ICW3_PSOTE    24 ADDDLVDAEGNLVENGGTYYLLPHIWAHGGGIETAKTGNEPCPLTVVRSPNEVSKGEPIRISSQFLSLFIPRGSLVALGFANPPSCAASPWWTVVDSPQGPAVKLSQQKLPEKDILVFKFEKVSHSNIHVYKLLYCQHDEEDVKCDQYIGIHRDRNGNRRLVVTEENPLELVLLKAKS 201
               SCOP domains d3i2xa_ A: automated matches                                                                                                                                                       SCOP domains
               CATH domains 3i2xA00 A:3-180  [code=2.80.10.50, no name defined]                                                                                                                                CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .................eeeeee........eeee.........eeee.........eeeee............eeeeee............eee......eee......hhhhhh.eeeee........eeeee.............eeeee.....eeeee.......eeeee... Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----SOYBEAN_KUNITZ   ------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3i2x A   3 MDDDLVDAEGNLVENGGTYYLLPHIWAHGGGIETAKTGNEPCPLTVVRSPNEVSKGEPIRISSRLRSAFIPRGSLVALGFANPPSCAASPWWTVVDSPQGPAVKLSQQKLPEKDILVFKFEKVSHSNIHVYKLLYCQHDEEDVKCDQYIGIHRDRNGNRRLVVTEENPLELVLLKAKS 180
                                    12        22        32        42        52        62        72        82        92       102       112       122       132       142       152       162       172        


Chain B from PDB  Type:PROTEIN  Length:181
 aligned with ICW3_PSOTE | P10822 from UniProtKB/Swiss-Prot  Length:207

    Alignment length:181
                                    30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200 
           ICW3_PSOTE    21 SSTADDDLVDAEGNLVENGGTYYLLPHIWAHGGGIETAKTGNEPCPLTVVRSPNEVSKGEPIRISSQFLSLFIPRGSLVALGFANPPSCAASPWWTVVDSPQGPAVKLSQQKLPEKDILVFKFEKVSHSNIHVYKLLYCQHDEEDVKCDQYIGIHRDRNGNRRLVVTEENPLELVLLKAKS 201
               SCOP domains d3i2xb_ B: automated matches                                                                                                                                                          SCOP domains
               CATH domains 3i2xB00 B:0-180  [code=2.80.10.50, no name defined]                                                                                                                                   CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...................eeeeeee........eeee.........eeee.........eeeee..............eeee............eee......eee......hhhhhh.eeeeee......eeeeee...........eeeeeee.....eeeee.......eeeee... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -------SOYBEAN_KUNITZ   ------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3i2x B   0 GSHMDDDLVDAEGNLVENGGTYYLLPHIWAHGGGIETAKTGNEPCPLTVVRSPNEVSKGEPIRISSRLRSAFIPRGSLVALGFANPPSCAASPWWTVVDSPQGPAVKLSQQKLPEKDILVFKFEKVSHSNIHVYKLLYCQHDEEDVKCDQYIGIHRDRNGNRRLVVTEENPLELVLLKAKS 180
                                     9        19        29        39        49        59        69        79        89        99       109       119       129       139       149       159       169       179
   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, 2)

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

(-) CATH Domains  (1, 2)

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

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 3I2X)

(-) Gene Ontology  (5, 5)

Asymmetric Unit(hide GO term definitions)
Chain A,B   (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 2et2 2qyi 2wbc 3i29 3i2a 3qyd 3veq 4h9w 4ha2 4tlp 4wbc

(-) Related Entries Specified in the PDB File

1xg6 3i2a