4DOQ

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.187 

wwPDB Validation 3D Report Full Report


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

  • 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

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Trypsin
A, C, E
223Sus scrofaMutation(s): 0 
EC: 3.4.21.4
Find proteins for P00761 (Sus scrofa)
Go to UniProtKB:  P00761
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Antileukoproteinase
B, D
47Homo sapiensMutation(s): 0 
Gene Names: SLPI (WAP4, WFDC4)
Find proteins for P03973 (Homo sapiens)
Go to Gene View: SLPI
Go to UniProtKB:  P03973
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B, C, D, E
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CA
Query on CA

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Download CCD File 
A, C, E
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
P6G
Query on P6G

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Download CCD File 
C
HEXAETHYLENE GLYCOL
POLYETHYLENE GLYCOL PEG400
C12 H26 O7
IIRDTKBZINWQAW-UHFFFAOYSA-N
 Ligand Interaction
XPE
Query on XPE

Download SDF File 
Download CCD File 
A
3,6,9,12,15,18,21,24,27-NONAOXANONACOSANE-1,29-DIOL
DECAETHYLENE GLYCOL
C20 H42 O11
DTPCFIHYWYONMD-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.187 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 40.535α = 90.00
b = 118.610β = 90.74
c = 93.393γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
CrystalCleardata collection
d*TREKdata scaling
DENZOdata reduction
PDB_EXTRACTdata extraction
REFMACrefinement
d*TREKdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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