1K9B

Crystal structure of the bifunctional soybean Bowman-Birk inhibitor at 0.28 nm resolution. Structural peculiarities in a folded protein conformation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.308 
  • R-Value Work: 0.221 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the bifunctional soybean Bowman-Birk inhibitor at 0.28-nm resolution. Structural peculiarities in a folded protein conformation.

Voss, R.H.Ermler, U.Essen, L.O.Wenzl, G.Kim, Y.M.Flecker, P.

(1996) Eur.J.Biochem. 242: 122-131


  • PubMed Abstract: 
  • The Bowman-Birk inhibitor from soybean is a small protein that contains a binary arrangement of trypsin-reactive and chymotrypsin-reactive subdomains. In this report, the crystal structure of this anticarcinogenic protein has been determined to 0.28- ...

    The Bowman-Birk inhibitor from soybean is a small protein that contains a binary arrangement of trypsin-reactive and chymotrypsin-reactive subdomains. In this report, the crystal structure of this anticarcinogenic protein has been determined to 0.28-nm resolution by molecular replacement from crystals grown at neutral pH. The crystal structure differs from a previously determined NMR structure [Werner, M. H. & Wemmer, D. E. (1992) Biochemistry 31, 999-1010] in the relative orientation of the two enzyme-insertion loops, in some details of the main chain trace, in the presence of favourable contacts in the trypsin-insertion loop, and in the orientation of several amino acid side chains. The proximity of Met27 and Gln48 in the X-ray structure contradicts the solution structure, in which these two side chains point away from each other. The significant effect of a Met27-->Ile replacement on the inhibitory activity of the chymotrypsin-reactive subdomain agrees with the X-ray structure. Exposed hydrophobic patches, the presence of charged amino acid residues, and the presence of water molecules in the protein interior are in contrast to standard proteins that comprise a hydrophobic core and exposed polar amino acids.


    Related Citations: 
    • Template-directed protein folding into a metastable state of increased activity
      Flecker, P.
      (1995) Eur.J.Biochem. 232: 528
    • A new and general procedure for refolding mutant Bowman-Birk-type proteinase inhibitors on trypsin-Sepharose as a matrix with complementary structure.
      Flecker, P.
      (1989) FEBS Lett. 252: 153
    • Mutational analysis of disulfide bonds in the trypsin-reactive subdomain of a Bowman-Birk-type inhibitor of trypsin and chymotrypsin. Cooperative versus autonomous refolding of subdomains
      Philipp, S.,Kim, Y.M.,Duerr, I.,Wenzl, G.,Vogt, M.,Flecker, P.
      (1998) Eur.J.Biochem. 251: 854
    • Crystal Structure of Cancer Chemopreventive Bowman-Birk Inhibitor in Ternary Complex with Bovine Trypsin at 2.3 Ao Resolution. Structural Basis of Janus-faced Serine Protease Inhibitor Specificity
      Koepke, J.,Ermler, U.,Warkentin, E.,Wenzl, G.,Flecker, P.
      (2000) J.Mol.Biol. 298: 477
    • Chemical synthesis, molecular cloning and expression of gene coding for a Bowman-Birk-type proteinase inhibitor
      Flecker, P.
      (1987) Eur.J.Biochem. 166: 151


    Organizational Affiliation

    Max-Planck-Institut für Biophysik, Frankfurt am Main, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BOWMAN-BIRK TYPE PROTEINASE INHIBITOR
A
58Glycine maxMutation(s): 0 
Find proteins for P01055 (Glycine max)
Go to UniProtKB:  P01055
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.308 
  • R-Value Work: 0.221 
  • Space Group: P 41 3 2
Unit Cell:
Length (Å)Angle (°)
a = 86.100α = 90.00
b = 86.100β = 90.00
c = 86.100γ = 90.00
Software Package:
Software NamePurpose
X-PLORrefinement
CCP4data scaling
X-PLORmodel building
ROTAVATA-AGROVATAdata reduction
X-PLORphasing
ROTAVATA)data scaling
WEISdata collection
WEISdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-11-16
    Type: Initial release
  • Version 1.1: 2007-10-21
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance