1TAB

STRUCTURE OF THE TRYPSIN-BINDING DOMAIN OF BOWMAN-BIRK TYPE PROTEASE INHIBITOR AND ITS INTERACTION WITH TRYPSIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Observed: 0.200 

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This is version 1.2 of the entry. See complete history


Literature

Structure of the trypsin-binding domain of Bowman-Birk type protease inhibitor and its interaction with trypsin.

Tsunogae, Y.Tanaka, I.Yamane, T.Kikkawa, J.Ashida, T.Ishikawa, C.Watanabe, K.Nakamura, S.Takahashi, K.

(1986) J Biochem 100: 1637-1646

  • DOI: 10.1093/oxfordjournals.jbchem.a121872
  • Primary Citation of Related Structures:  
    1TAB

  • PubMed Abstract: 
  • The crystal structure of the complex formed by bovine trypsin and Bowman-Birk type protease inhibitor AB-I extracted from azuki beans (Vigna angularis) 'Takara' has been analyzed. The structure was solved by the application of the phase combination of single isomorphous phases and trypsin model phases, followed by phase improvement using the iterative Fourier technique ...

    The crystal structure of the complex formed by bovine trypsin and Bowman-Birk type protease inhibitor AB-I extracted from azuki beans (Vigna angularis) 'Takara' has been analyzed. The structure was solved by the application of the phase combination of single isomorphous phases and trypsin model phases, followed by phase improvement using the iterative Fourier technique. From the resulting electron density map, a three-dimensional atomic model of the trypsin binding domain of AB-I has been built. The peptide chain at the trypsin reactive site turns back sharply at Pro29 and forms a 9-residue ring (Cys24-Cys32). The 'front side' of this ring, consisting of the reactive site (Cys24-Met28), interacts with trypsin in a similar manner to other families of inhibitors and forms a stable complex, which seems to be maintained by the interactions with the 'back side' of this ring (Pro29-Cys34). The similar spatial arrangements of the 'back side' of this inhibitor and the 'secondary contact region' of the other inhibitors with respect to the reactive site suggest an important common role of these regions in exhibiting inhibitory activity.


    Related Citations: 
    • The Structure of Bowman-Birk Type Protease Inhibitor A-II from Peanut (Arachis Hypogaea) at 3.3 Angstroms Resolution
      Suzuki, A., Tsunogae, Y., Tanaka, I., Yamane, T., Ashida, T., Norioka, S., Hara, S., Ikenaka, T.
      (1987) J Biochem 101: 267

    Organizational Affiliation

    Research Institute of Molecular Genetics, Kochi University, Nankoku, Kochi 783-8502, Japan. Electronic address: kouheio@kochi-u.ac.jp.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TRYPSINA [auth E]223Bos taurusMutation(s): 0 
EC: 3.4.21.4
Find proteins for P00760 (Bos taurus)
Explore P00760 
Go to UniProtKB:  P00760
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
BOWMAN-BIRK TYPE PROTEINASE INHIBITORB [auth I]82N/AMutation(s): 0 
Find proteins for P01058 (Phaseolus angularis)
Explore P01058 
Go to UniProtKB:  P01058
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Observed: 0.200 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.42α = 90
b = 55.42β = 90
c = 181.72γ = 90
Software Package:
Software NamePurpose
PROLSQrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1992-01-15
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance