Cloning and shake flask expression of hrIDS-Like in Pichia pastoris

The human Iduronate-2-sulfate sulfatase (hIDS-Like) was cloned into the methylotrophic yeast Pichia pastoris under the control of alcohol oxidase promoter (AOX1) and the α-mating factor signal peptide (α-factor). Six clones were identified by PCR. Using clone IDS28, the enzyme was secreted into the culture medium, yielding a protein with an activity of 4.213 nmol.h^-1.mg of total protein^-1 at 72 h, in 0.5% v/v methanol. Several bands were revealed by western-blot, indicating that a P. pastoris processing was slightly different than in mammalian cells.