PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 8286338-0 1994 Fluorescence investigation of yeast cytochrome c peroxidase oxidation by H2O2 and enzyme activities of the oxidized enzyme. Hydrogen Peroxide 73-77 cytochrome-c peroxidase Saccharomyces cerevisiae S288C 36-59 8286338-1 1994 The role of tryptophan residues as endogenous electron donors in cytochrome c peroxidase (CCP) was examined by protein steady-state fluorescence. Tryptophan 12-22 cytochrome-c peroxidase Saccharomyces cerevisiae S288C 65-88 8286338-1 1994 The role of tryptophan residues as endogenous electron donors in cytochrome c peroxidase (CCP) was examined by protein steady-state fluorescence. Tryptophan 12-22 cytochrome-c peroxidase Saccharomyces cerevisiae S288C 90-93 8286338-2 1994 Compound I and more highly oxidized forms of CCP were formed by adding 1, 3, and 10 equiv of H2O2 to 5 microM protein at pH 7.0 in the absence of exogenous reducing substrates. Hydrogen Peroxide 93-97 cytochrome-c peroxidase Saccharomyces cerevisiae S288C 45-48 8286338-3 1994 Addition of native CCP to 8 M urea at pH 1.5 relieved heme quenching, and compound I exhibited 90 +/- 4% fluorescence relative to unoxidized CCP, consistent with the loss of 0.7 +/- 0.2 tryptophan and the assignment of the primary radical site to Trp191. Urea 30-34 cytochrome-c peroxidase Saccharomyces cerevisiae S288C 19-22 8286338-3 1994 Addition of native CCP to 8 M urea at pH 1.5 relieved heme quenching, and compound I exhibited 90 +/- 4% fluorescence relative to unoxidized CCP, consistent with the loss of 0.7 +/- 0.2 tryptophan and the assignment of the primary radical site to Trp191. Heme 54-58 cytochrome-c peroxidase Saccharomyces cerevisiae S288C 19-22 8286338-3 1994 Addition of native CCP to 8 M urea at pH 1.5 relieved heme quenching, and compound I exhibited 90 +/- 4% fluorescence relative to unoxidized CCP, consistent with the loss of 0.7 +/- 0.2 tryptophan and the assignment of the primary radical site to Trp191. Tryptophan 186-196 cytochrome-c peroxidase Saccharomyces cerevisiae S288C 19-22 8286338-4 1994 CCP oxidized with 10-fold excess H2O2 exhibited 65 +/- 1% relative fluorescence, indicating loss of 2.4 +/- 0.1 tryptophans. Hydrogen Peroxide 33-37 cytochrome-c peroxidase Saccharomyces cerevisiae S288C 0-3 8286338-4 1994 CCP oxidized with 10-fold excess H2O2 exhibited 65 +/- 1% relative fluorescence, indicating loss of 2.4 +/- 0.1 tryptophans. Tryptophan 112-123 cytochrome-c peroxidase Saccharomyces cerevisiae S288C 0-3 8286338-5 1994 Compound I and the higher oxidized forms of CCP spontaneously decayed to ferric CCP species over approximately 24 h with the loss of approximately 0.5 additional tryptophan in each case. Tryptophan 162-172 cytochrome-c peroxidase Saccharomyces cerevisiae S288C 44-47 8286338-9 1994 The fluorescence decrease with time paralleled the decrease in activity of H2O2-oxidized CCP using both ferrocytochrome c and ferrocyanide as substrates, indicating that tryptophan and activity loss occurred on similar time scales. Hydrogen Peroxide 75-79 cytochrome-c peroxidase Saccharomyces cerevisiae S288C 89-92 8286338-9 1994 The fluorescence decrease with time paralleled the decrease in activity of H2O2-oxidized CCP using both ferrocytochrome c and ferrocyanide as substrates, indicating that tryptophan and activity loss occurred on similar time scales. hexacyanoferrate II 126-138 cytochrome-c peroxidase Saccharomyces cerevisiae S288C 89-92 8286338-9 1994 The fluorescence decrease with time paralleled the decrease in activity of H2O2-oxidized CCP using both ferrocytochrome c and ferrocyanide as substrates, indicating that tryptophan and activity loss occurred on similar time scales. Tryptophan 170-180 cytochrome-c peroxidase Saccharomyces cerevisiae S288C 89-92