L-gamma-glutamyl-L-propargylglycine hydroxylase activity
Catalysis of the reaction: 2-oxoglutarate + L-gamma-glutamyl-L-propargylglycine + O2 = CO2 + L-gamma-glutamyl-(3R)-L-beta-ethynylserine + succinate.
GO:0016706
2-oxoglutarate-dependent dioxygenase activity
is_a