4DOQ

Crystal structure of the complex of Porcine Pancreatic Trypsin with 1/2SLPI

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.190 

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This is version 1.2 of the entry. See complete history. 


Literature

Structure basis 1/2SLPI and porcine pancreas trypsin interaction

Fukushima, K., Kamimura, T., Takimoto-Kamimura, M.

(2013) J Synchrotron Radiat 20: 943-947

  • DOI: 10.1107/S090904951302133X
  • Primary Citation of Related Structures:  
    4DOQ

  • PubMed Abstract: 

    • SLPI (secretory leukocyte protease inhibitor) is a 107-residue protease inhibitor which inhibits various serine proteases, including elastase, cathepsin G, chymotrypsin and trypsin. SLPI is obtained as a multiple inhibitor in lung defense and in chro ...

    SLPI (secretory leukocyte protease inhibitor) is a 107-residue protease inhibitor which inhibits various serine proteases, including elastase, cathepsin G, chymotrypsin and trypsin. SLPI is obtained as a multiple inhibitor in lung defense and in chronic airway infection. X-ray crystal structures have so far reported that they are full-length SLPIs with bovine α-chymotrypsin and 1/2SLPI (recombinant C-terminal domain of SLPI; Arg58-Ala107) with HNE (human neutrophil elastase). To understand the role of this multiple inhibitory mechanism, the crystal structure of 1/2SLPI with porcine pancreas trypsin was solved and the binding modes of two other complexes compared. The Leu residue surprisingly interacts with the S1 site of trypsin, as with chymotrypsin and elastase. The inhibitory mechanism of 1/2SLPI using the wide primary binding site contacts (from P2' to P5) with various serine proteases is discussed. These inhibitory mechanisms have been acquired in the evolution of the protection system for acute inflammatory diseases.

    Organizational Affiliation: 

    Medicinal Chemistry Technology Department, Teijin Institute for Bio-Medical Research, 4-3-2 Asahigaoka, Hino-shi, Tokyo 191-8512, Japan.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TrypsinA, C, E223Sus scrofaMutation(s): 0 
EC: 3.4.21.4
Find proteins for P00761 (Sus scrofa)
Explore P00761 
Go to UniProtKB:  P00761
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
AntileukoproteinaseB, D47Homo sapiensMutation(s): 0 
Gene Names: SLPI, WAP4, WFDC4
Find proteins for P03973 (Homo sapiens)
Explore P03973 
Go to UniProtKB:  P03973
NIH Common Fund Data Resources
PHAROS  P03973
GTEx  ENSG00000124107
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.190 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.535α = 90
b = 118.61β = 90.74
c = 93.393γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
d*TREKdata reduction
MOLREPphasing
REFMACrefinement
PDB_EXTRACTdata extraction
CrystalCleardata collection
d*TREKdata scaling

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-08-14
    Type: Initial release
  • Version 1.1: 2013-10-30
    Changes: Database references
  • Version 1.2: 2018-07-25
    Changes: Data collection