, 1998) at the SacII/XbaI site (for the 5′-flanking region) and the EcoRI/SalI site (for the 5′-portion of CDS) of p97CGH (Nakayama et al., 1998), resulting in the plasmid p97RAM2. Approximately a 2.5-kb DNA fragment obtained by

digesting p97RAM2 with SacII and SalI was used to transform ACG4 (Nakayama et al., 1998); the resulting strains were designated tet-RAM2. Primers RAM2CHA (nt −750 to −731) and RAM2CHB (nt 385–405) were used to confirm the correct integration sites (data not shown). For ERG20, the 5′-flanking region (nt −457 to −217) or the 5′-CDS region (nt −6 to 350) of ERG20 was amplified with PCR using the primers ERG20AF and ERG20AR or ERG20BF and ERG20BR, respectively. Both amplified fragments of ERG20 were digested at the SacII/XbaI site (for the 5′-flanking find more region) and the MunI/SalI site (for the 5′-portion of CDS) and cloned into the SacII/XbaI site (for region A) and the EcoRI/SalI site (for region B) of p97CGH to facilitate ligation to the CgHIS3-97t, resulting in plasmid p97ERG20. Approximately a 2.5-kb DNA fragment obtained by digesting p97ERG20 with SacII and SalI was used to transform ACG4; the resulting strains were designated tet-ERG20.

Integration at the correct genomic site was confirmed by PCR using the primers ERG20CHA (nt −666 to −648) and ERG20CHB (nt 483–503) (data not shown). The primers used in this study are listed in Table 2. For time-course experiments, approximately 104 mutant cells mL−1 were inoculated and cultured in YEPD medium at 37 °C with or without 10 μg mL−1 of doxycycline. Growth was monitored Selleckchem Metformin by measuring OD600 nm at indicated times after adding doxycycline. The number of viable cells was determined NADPH-cytochrome-c2 reductase by counting aliquots of individual colonies on agar plates after incubation for 24 h at 37 °C. For measuring growth in serum-, FPP- or GPP-containing media, approximately 103 cells (200 μL) were inoculated and cultured in YEPD medium at 37 °C for 14 h, with or without 10 μg mL−1 of doxycycline, and in the presence of various concentrations of human serum (Irvine Scientific), FPP (Sigma-Aldrich) or GPP (Sigma-Aldrich). Male CD-1 mice

were immunocompromised by injecting cyclophosphamide (200 mg kg−1) 3 days before infection and 100 mg kg−1 0, 3, 7 and 11 days after infection. In addition to cyclophosphamide, mice were also coinjected with 125 mg kg−1 cortisone acetate. Each mouse was intravenously inoculated with 105C. glabrata cells, and administered doxycycline (2 mg mL−1), dissolved in a 5% sucrose solution, as drinking water 6 days before infection. At indicated times, 0 or 14 days after infection, mice were killed, and their kidneys were removed and homogenized. The homogenates were spread on YEPD agar plates containing penicillin G (200 U mL−1) and streptomycin (200 μg mL−1). After a 24-h incubation at 37 °C, the number of yeast colonies appearing on agar plates was counted.