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. Author manuscript; available in PMC: 2013 Jun 14.
Published in final edited form as: Biochemistry. 2008 Dec 2;47(48):12810–12821. doi: 10.1021/bi800951f

Table 5.

Peptide Disulfides as Substrates for Yeast GR.

Substrate Activity (moles NADPH/min/mole of enzyme)a
PTVTGCUG(ox)b 1.89 ± 0.31
PTVTGCCG(ox)b 0.05 ± 0.005
PTPASCUS(ox)b 1.19 ± 0.023
PTPASCCS(ox)b 0.07 ± 0.018
PTVTGC-TNBb 9.54 ± 0.27
PTPASC-TNBb 16.07 ± 0.22
GSSGc 4357 ± 130
a

Activity is reported per monomer of GR

b

At 1 mM peptide in the assay cocktail.

c

At 250 μM GSSG and 1 nM yeast GR in the assay cocktail.