2BI6

NMR STUDY OF BROMELAIN INHIBITOR VI FROM PINEAPPLE STEM

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 18 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history. 


Literature

Solution structure of bromelain inhibitor IV from pineapple stem: structural similarity with Bowman-Birk trypsin/chymotrypsin inhibitor from soybean.

Hatano, K., Kojima, M., Tanokura, M., Takahashi, K.

(1996) Biochemistry 35: 5379-5384

  • DOI: 10.1021/bi952754+
  • Primary Citation of Related Structures:  
    1BI6, 2BI6

  • PubMed Abstract: 

    • Bromelain inhibitor VI from pineapple stem (BI-VI) is a unique double-chain inhibitor with an 11-residue light chain and a 41-residue heavy chain by disulfide bonds and inhibits the cysteine proteinase bromelain competitively. The structure of BI-VI in aqueous solution was determined using nuclear magnetic resonance spectroscopy and simulated annealing-based calculations ...

    Bromelain inhibitor VI from pineapple stem (BI-VI) is a unique double-chain inhibitor with an 11-residue light chain and a 41-residue heavy chain by disulfide bonds and inhibits the cysteine proteinase bromelain competitively. The structure of BI-VI in aqueous solution was determined using nuclear magnetic resonance spectroscopy and simulated annealing-based calculations. Its three-dimensional structure was shown to be composed of two distinct domains, each of which is formed by a three-stranded antiparallel beta-sheet. Unexpectedly, BI-VI was found to share a similar folding and disulfide bond connectivities not with cystatin superfamily inhibitors which inhibit the same cysteine proteinases but with the Bowman-Birk trypsin/chymotrypsin inhibitor from soybean (BBI-I). BBI-I is a 71-residue inhibitor which has two independent inhibitory sites toward the serine proteinases trypsin and chymotrypsin. These structural similarities with BBI-I suggest that they have evolved from a common ancestor and differentiated in function during a course of molecular evolution.

    Related Citations: 
    • Primary Structure,Sequence-Specific 1H Assignments and Secondary Structure in Solution of Bromelain Inhibitor Vi from Pineapple Stem
      Hatano, K., Kojima, M., Tanokura, M., Takahashi, K.
      (1995) Eur J Biochem 232: 335
    Organizational Affiliation: 

    Department of Biophysics and Biochemistry, Faculty of Science, University of Tokyo, Japan.



Macromolecules
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
BROMELAIN INHIBITOR VI L11Ananas comosusMutation(s): 0 
Find proteins for P01068 (Ananas comosus)
Explore P01068 
Go to UniProtKB:  P01068
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
BROMELAIN INHIBITOR VI H41Ananas comosusMutation(s): 0 
Find proteins for P01068 (Ananas comosus)
Explore P01068 
Go to UniProtKB:  P01068
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 18 
  • OLDERADO: 2BI6 Olderado

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 1995-12-07 
  • Released Date: 1996-04-03 
    • Deposition Author(s): Hatano, K.-I.

Revision History  (Full details and data files)

  • Version 1.0: 1996-04-03
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-11-29
    Changes: Derived calculations, Other