5BRR

Michaelis complex of tPA-S195A:PAI-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.16 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.207 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Crystal Structure of the Michaelis Complex between Tissue-type Plasminogen Activator and Plasminogen Activators Inhibitor-1

Gong, L.Liu, M.Zeng, T.Shi, X.Yuan, C.Andreasen, P.A.Huang, M.

(2015) J Biol Chem 290: 25795-25804

  • DOI: https://doi.org/10.1074/jbc.M115.677567
  • Primary Citation of Related Structures:  
    5BRR

  • PubMed Abstract: 

    Thrombosis is a leading cause of death worldwide. Recombinant tissue-type plasminogen activator (tPA) is the Food and Drug Administration-approved thrombolytic drug. tPA is rapidly inactivated by endogenous plasminogen activator inhibitor-1 (PAI-1). Engineering on tPA to reduce its inhibition by PAI-1 without compromising its thrombolytic effect is a continuous effort. Precise details, with atomic resolution, of the molecular interactions between tPA and PAI-1 remain unknown despite previous extensive studies. Here, we report the crystal structure of the tPA·PAI-1 Michaelis complex, which shows significant differences from the structure of its urokinase-type plasminogen activator analogue, the uPA·PAI-1 Michaelis complex. The PAI-1 reactive center loop adopts a unique kinked conformation. The structure provides detailed interactions between tPA 37- and 60-loops with PAI-1. On the tPA side, the S2 and S1β pockets open up to accommodate PAI-1. This study provides structural basis to understand the specificity of PAI-1 and to design newer generation of thrombolytic agents with reduced PAI-1 inactivation.


  • Organizational Affiliation

    From the State Key Laboratory of Structural Chemistry and Danish-Chinese Centre for Proteases and Cancer, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002 Fujian, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Plasminogen activator inhibitor 1A [auth I]379Homo sapiensMutation(s): 4 
Gene Names: SERPINE1PAI1PLANH1
UniProt & NIH Common Fund Data Resources
Find proteins for P05121 (Homo sapiens)
Explore P05121 
Go to UniProtKB:  P05121
PHAROS:  P05121
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
Tissue-type plasminogen activatorB [auth E]252Homo sapiensMutation(s): 3 
Gene Names: PLAT
EC: 3.4.21.68
UniProt & NIH Common Fund Data Resources
Find proteins for P00750 (Homo sapiens)
Explore P00750 
Go to UniProtKB:  P00750
PHAROS:  P00750
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00750
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.16 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.207 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 49.74α = 90
b = 73.94β = 90
c = 201.8γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOLREPmodel building
HKL-2000data collection

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data

  • Released Date: 2015-09-02 
  • Deposition Author(s): Gong, L.

Funding OrganizationLocationGrant Number
National Natural Science Foundation of ChinaChina31170707
National Natural Science Foundation of ChinaChina31370737
CAS/SFEA International Partnership Program for Creative Research TeamsChina--

Revision History  (Full details and data files)

  • Version 1.0: 2015-09-02
    Type: Initial release
  • Version 1.1: 2015-09-09
    Changes: Database references
  • Version 1.2: 2015-09-16
    Changes: Database references
  • Version 1.3: 2015-11-11
    Changes: Database references
  • Version 1.4: 2017-10-18
    Changes: Author supporting evidence, Database references, Derived calculations