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(-) Description

Title :  CRYSTAL STRUCTURE OF TEXTILININ-1, A KUNITZ-TYPE SERINE PROTEASE INHIBITOR FROM THE AUSTRALIAN COMMON BROWN SNAKE VENOM
 
Authors :  E. K. Millers, L. W. Guddat
Date :  15 Jan 08  (Deposition) - 20 Jan 09  (Release) - 16 Jun 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  1.63
Chains :  Asym./Biol. Unit :  A,B,C
Keywords :  Bpti-Like, Beta Hairpin, Kunitz-Type Protease Inhibitor, Trypsin, Plasmin, Hydrolase Inhibitor (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  E. K. Millers, M. Trabi, P. P. Masci, M. F. Lavin, J. De Jersey, L. W. Guddat
Crystal Structure Of Textilinin-1, A Kunitz-Type Serine Protease Inhibitor From The Venom Of The Australian Common Brown Snake (Pseudonaja Textilis).
Febs J. V. 276 3163 2009
PubMed-ID: 19490116  |  Reference-DOI: 10.1111/J.1742-4658.2009.07034.X
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - TEXTILININ
    Chains: A, B, C
    Engineered: YES
    Expression System: ESCHERICHIA COLI
    Expression System Taxid: 562
    Fragment: RESIDUES 1-59 (UNP RESIDUES 25-83)
    Organism Scientific: PSEUDONAJA TEXTILIS TEXTILIS
    Organism Taxid: 169397
    Synonym: TEXTILININ-1

 Structural Features

(-) Chains, Units

  123
Asymmetric/Biological Unit : ABC

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (2, 3)

Asymmetric/Biological Unit (2, 3)
No.NameCountTypeFull Name
1ETX2Ligand/Ion2-ETHOXYETHANOL
2SO41Ligand/IonSULFATE ION

(-) Sites  (1, 1)

Asymmetric Unit (1, 1)
No.NameEvidenceResiduesDescription
1AC1SOFTWARECYS A:40 , GLU A:41 , HOH A:68 , HOH A:76 , HOH A:78 , HOH A:138 , ARG C:17BINDING SITE FOR RESIDUE SO4 A 60

(-) SS Bonds  (9, 9)

Asymmetric/Biological Unit
No.Residues
1A:7 -A:57
2A:16 -A:40
3A:32 -A:53
4B:7 -B:57
5B:16 -B:40
6B:32 -B:53
7C:7 -C:57
8C:16 -C:40
9C:32 -C:53

(-) Cis Peptide Bonds  (0, 0)

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

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (2, 6)

Asymmetric/Biological Unit (2, 6)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1BPTI_KUNITZ_2PS50279 Pancreatic trypsin inhibitor (Kunitz) family profile.VKT1_PSETT31-81
 
 		  3A:7-57
B:7-57
C:7-57
2BPTI_KUNITZ_1PS00280 Pancreatic trypsin inhibitor (Kunitz) family signature.VKT1_PSETT59-77
 
 		  3A:35-53
B:35-53
C:35-53

(-) Exons   (0, 0)

(no "Exon" information available for 3BYB)

(-) 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    
   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:58
 aligned with VKT1_PSETT | Q90WA1 from UniProtKB/Swiss-Prot  Length:83

    Alignment length:58
                                    34        44        54        64        74        
            VKT1_PSETT   25 KDRPDFCELPADTGPCRVRFPSFYYNPDEKKCLEFIYGGCEGNANNFITKEECESTCA 82
               SCOP domains d3byba_ A: automated matches                               SCOP domains
               CATH domains ---------------------------------------------------------- CATH domains
               Pfam domains ---------------------------------------------------------- Pfam domains
         Sec.struct. author ...hhhhhh..........eeeeeee....eeeeeee...........hhhhhhhhhh Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------- SAPs(SNPs)
                PROSITE (1) ------BPTI_KUNITZ_2  PDB: A:7-57 UniProt: 31-81          - PROSITE (1)
                PROSITE (2) ----------------------------------BPTI_KUNITZ_1      ----- PROSITE (2)
                 Transcript ---------------------------------------------------------- Transcript
                  3byb A  1 KDRPDFCELPADTGPCRVRFPSFYYNPDEKKCLEFIYGGCEGNANNFITKEECESTCA 58
                                    10        20        30        40        50        


Chain B from PDB  Type:PROTEIN  Length:58
 aligned with VKT1_PSETT | Q90WA1 from UniProtKB/Swiss-Prot  Length:83

    Alignment length:58
                                    35        45        55        65        75        
            VKT1_PSETT   26 DRPDFCELPADTGPCRVRFPSFYYNPDEKKCLEFIYGGCEGNANNFITKEECESTCAA 83
               SCOP domains d3bybb_ B: automated matches                               SCOP domains
               CATH domains ---------------------------------------------------------- CATH domains
               Pfam domains ---------------------------------------------------------- Pfam domains
         Sec.struct. author ..hhhhhh..........eeeeeee....eeeeeee...........hhhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------- SAPs(SNPs)
                PROSITE (1) -----BPTI_KUNITZ_2  PDB: B:7-57 UniProt: 31-81          -- PROSITE (1)
                PROSITE (2) ---------------------------------BPTI_KUNITZ_1      ------ PROSITE (2)
                 Transcript ---------------------------------------------------------- Transcript
                  3byb B  2 DRPDFCELPADTGPCRVRFPSFYYNPDEKKCLEFIYGGCEGNANNFITKEECESTCAA 59
                                    11        21        31        41        51        


Chain C from PDB  Type:PROTEIN  Length:58
 aligned with VKT1_PSETT | Q90WA1 from UniProtKB/Swiss-Prot  Length:83

    Alignment length:58
                                    34        44        54        64        74        
            VKT1_PSETT   25 KDRPDFCELPADTGPCRVRFPSFYYNPDEKKCLEFIYGGCEGNANNFITKEECESTCA 82
               SCOP domains d3bybc_ C: automated matches                               SCOP domains
               CATH domains ---------------------------------------------------------- CATH domains
               Pfam domains ---------------------------------------------------------- Pfam domains
         Sec.struct. author ...hhhhhh..........eeeeeee....eeeeeee...........hhhhhhhhhh Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------- SAPs(SNPs)
                PROSITE (1) ------BPTI_KUNITZ_2  PDB: C:7-57 UniProt: 31-81          - PROSITE (1)
                PROSITE (2) ----------------------------------BPTI_KUNITZ_1      ----- PROSITE (2)
                 Transcript ---------------------------------------------------------- Transcript
                  3byb C  1 KDRPDFCELPADTGPCRVRFPSFYYNPDEKKCLEFIYGGCEGNANNFITKEECESTCA 58
                                    10        20        30        40        50
   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, 3)

Asymmetric/Biological Unit
(-)
Class: Small proteins (3458)

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 3BYB)

(-) Pfam Domains  (0, 0)

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

(-) Gene Ontology  (6, 6)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A,B,C   (VKT1_PSETT | Q90WA1)
molecular function
    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:0035899    negative regulation of blood coagulation in other organism    Any process in which an organism stops, prevents or reduces the frequency, rate or extent of blood coagulation in another organism. Blood coagulation is the sequential process in which the multiple coagulation factors of the blood interact, ultimately resulting in the formation of an insoluble fibrin clot.
    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

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        VKT1_PSETT | Q90WA1: 3d65 3uir

(-) Related Entries Specified in the PDB File

1bpi