Abstract
The main ligand-binding determinant of the human urokinase receptor (uPAR) is located in the amino terminal domain D1, but when isolated this domain presents a 1500 fold lower affinity than the intact three-domain uPAR (D1D2D3). uPAR mutants missing either domain 2 (D1HD3) or domain 3 (D1D2) were expressed in murine LB6 cells and showed to be properly GPI-anchored to the cell surface. Binding assays with [ 125I]ATF demonstrated that these mutants possessed a normal (D1D2) or slightly reduced (D1HD3) affinity, indicating that a high ligand-affinity may be achieved by a combination of D1 with domain D2 or D3.
Original language | English |
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Pages (from-to) | 1-6 |
Number of pages | 6 |
Journal | FEBS Letters |
Volume | 381 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - Feb 26 1996 |
Keywords
- GPI-anchored protein
- uPA
- Urokinase receptor
ASJC Scopus subject areas
- Biochemistry
- Biophysics
- Molecular Biology