Attachment of GPI anchor to uPAR

Summary
Organism
Homo sapiens (human)
Reactome
R-HSA-162791
PubChem
R-HSA-162791
Description
  • The mature form of urokinase plasminogen activator receptor (uPAR) is attached to the plasma membrane by a glycosylphosphatidylinositol (GPI) anchor (Ploug et al. 1991). As nascent uPAR polypeptide moves into the lumen of the endoplasmic reticulum, it is attacked by a transamidase complex that cleaves the uPAR polypeptide after residue 305, releasing the carboxyterminal peptide of uPAR and replacing it with an acylated GPI moiety. In a second step, the GPI moiety is deacylated, yielding a uPAR-GPI conjugate that can be efficiently transported to the Golgi apparatus.
Click on a node on the pathway to see its details. Glycoproteins are marked with a glycoprotein icon in their name.
Displaying all 7 entries
UniProt ID Protein Name Gene Symbol Pathway Viewer
O43292 GPI-anchor transamidase component GPAA1
  • GAA1
  • GPAA1
view
Q03405 Urokinase plasminogen activator surface receptor
  • MO3
  • PLAUR
  • UPAR
view
Q75T13 GPI inositol-deacylase
  • PGAP1
  • UNQ3024/PRO9822
view
Q92643 GPI-anchor transamidase
  • GPI8
  • PIGK
view
Q969N2 GPI-anchor transamidase component PIGT
  • CGI-06
  • PIGT
  • PSEC0163
  • UNQ716/PRO1379
view
Q96S52 GPI-anchor transamidase component PIGS
  • PIGS
  • UNQ1873/PRO4316
view
Q9H490 GPI-anchor transamidase component PIGU
  • CDC91L1
  • PIGU
  • PSEC0205
  • UNQ3055/PRO9875
view

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Acknowledgements

Supported by JST NBDC Grant Number JPMJND2204

Partly supported by NIH Common Fund Grant #1U01GM125267-01


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Last updated: April 6, 2026