The present invention is directed to ligand binding polypeptides which comprise a portion of VEGFR-3 extracellular domain and which bind to VEGF-C and VEGF-D, and uses thereof to modulate angiogenesis and/or lymphangiogenesis. A glycosylation sequon in the extracellular domain of wildtype VEGFR-3 has been modified to eliminate glycosylation at a specific site within the ligand binding polypeptides, providing improved pharmacological properties of the polypeptides, in particular when used as therapeutic proteins.