9PAI

CLEAVED SUBSTRATE VARIANT OF PLASMINOGEN ACTIVATOR INHIBITOR-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.181 

wwPDB Validation   3D Report Full Report


This is version 1.6 of the entry. See complete history


Literature

Mechanisms contributing to the conformational and functional flexibility of plasminogen activator inhibitor-1.

Aertgeerts, K.De Bondt, H.L.De Ranter, C.J.Declerck, P.J.

(1995) Nat Struct Biol 2: 891-897

  • DOI: https://doi.org/10.1038/nsb1095-891
  • Primary Citation of Related Structures:  
    9PAI

  • PubMed Abstract: 

    Plasminogen activator inhibitor-1 (PAI-1) is unique among the serine proteinase inhibitors (serpins) in that it can adopt at least three different conformations (active, substrate and latent). We report the X-ray structure of a cleaved substrate variant of human PAI-1, which has a new beta-strand s4A formed by insertion of the amino-terminal portion of the reactive-site loop into beta-sheet A subsequent to cleavage. This is in contrast to the previous suggestion that the non-inhibitory function of substrate-type serpins is mainly due to an inability of the reactive-site loop to adopt this conformation. Comparison with the structure of latent PAI-1 provides insights into the molecular determinants responsible for the transition of the stressed active conformation to the thermostable latent conformation.


  • Organizational Affiliation

    Laboratory for Analytical Chemistry and Medicinal Physicochemistry, Faculty of Pharmaceutical Sciences, Katholieke Universiteit Leuven, Belgium.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PROTEIN (PLASMINOGEN ACTIVATOR INHIBITOR-1) residues 19-364346Homo sapiensMutation(s): 1 
UniProt & NIH Common Fund Data Resources
Find proteins for P05121 (Homo sapiens)
Explore P05121 
Go to UniProtKB:  P05121
GTEx:  ENSG00000106366 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP05121
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
PROTEIN (PLASMINOGEN ACTIVATOR INHIBITOR-1) residues 365-39733Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P05121 (Homo sapiens)
Explore P05121 
Go to UniProtKB:  P05121
GTEx:  ENSG00000106366 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP05121
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.181 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 151.86α = 90
b = 47.52β = 113.95
c = 62.73γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
FRAMBOdata collection
SAINTdata reduction
SAINTdata scaling
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1999-03-19
    Type: Initial release
  • Version 1.1: 2008-04-26
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2017-10-04
    Changes: Refinement description
  • Version 1.4: 2018-03-07
    Changes: Data collection
  • Version 1.5: 2018-03-14
    Changes: Database references
  • Version 1.6: 2023-12-27
    Changes: Data collection, Database references, Derived calculations