1DB2

CRYSTAL STRUCTURE OF NATIVE PLASMINOGEN ACTIVATOR INHIBITOR-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.255 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Plasminogen activator inhibitor 1. Structure of the native serpin, comparison to its other conformers and implications for serpin inactivation.

Nar, H.Bauer, M.Stassen, J.M.Lang, D.Gils, A.Declerck, P.J.

(2000) J.Mol.Biol. 297: 683-695

  • DOI: 10.1006/jmbi.2000.3604

  • PubMed Abstract: 
  • The crystal structure of a constitutively active multiple site mutant of plasminogen activator inhibitor 1 (PAI-1) was determined and refined at a resolution of 2.7 A. The present structure comprises a dimer of two crystallographically independent PA ...

    The crystal structure of a constitutively active multiple site mutant of plasminogen activator inhibitor 1 (PAI-1) was determined and refined at a resolution of 2.7 A. The present structure comprises a dimer of two crystallographically independent PAI-1 molecules that pack by association of the residues P6 to P3 of the reactive centre loop of one molecule (A) with the edge of the main beta-sheet A of the other molecule (B).Thus, the reactive centre loop is ordered for molecule A by crystal packing forces, while for molecule B it is unconstrained by crystal packing contacts and is disordered. The overall structure of active PAI-1 is similar to the structures of other active inhibitory serpins exhibiting as the major secondary structural feature a five-stranded beta-sheet A and an intact proteinase-binding loop protruding from the one end of the elongated molecule. No preinsertion of the reactive centre loop is observed in this structure.A comparison of the present structure with the previously determined crystal structures of PAI-1 in its alternative conformations reveals that, upon cleavage of an intact form of PAI-1 or formation of latent PAI-1, the well-characterised rearrangements of the serpin secondary structural elements are accompanied by dramatic and partly unexpected conformational changes of helical and loop structures proximal to beta-sheet A. The present structure explains the stabilising effects of the mutated residues, reveals the structural cause for the observed spectroscopic differences between active and latent PAI-1, and provides new insights into possible mechanisms of stabilisation by its natural binding partner, vitronectin.


    Organizational Affiliation

    Department of Chemistry, Boehringer Ingelheim Pharma KG, Biberach, Germany. herbert.nar@bc.boehringer-ingelheim.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PLASMINOGEN ACTIVATOR INHIBITOR-1
A, B
377Homo sapiensMutation(s): 5 
Gene Names: SERPINE1 (PAI1, PLANH1)
Find proteins for P05121 (Homo sapiens)
Go to Gene View: SERPINE1
Go to UniProtKB:  P05121
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.255 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 92.600α = 90.00
b = 92.600β = 90.00
c = 251.500γ = 120.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
AMoREphasing
REFMACrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-11-10
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance