کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1923113 1535847 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Differential localization and potency of manganese porphyrin superoxide dismutase-mimicking compounds in Saccharomyces cerevisiae
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی سالمندی
پیش نمایش صفحه اول مقاله
Differential localization and potency of manganese porphyrin superoxide dismutase-mimicking compounds in Saccharomyces cerevisiae
چکیده انگلیسی


• Cellular distribution of Mn porphyrin SOD mimics correlates with their lipophilicity.
• Higher lipophilicity directs Mn porphyrin SOD mimics to the mitochondria.
• In sod1∆ yeast, SOD mimics in mitochondria increased rescue of Lys, not Met auxotrophy.
• A mitochondrial target is involved in the sod1∆-dependent Lys auxotrophy.

Cationic Mn(III) porphyrin complexes based on MnTM-2-PyP are among the most promising superoxide dismutase (SOD) mimicking compounds being considered as potential anti-inflammatory drugs. We studied four of these active compounds in the yeast Saccharomyces cerevisiae, MnTM-2-PyP, MnTE-2-PyP, MnTnHex-2-PyP, and MnTnBu-2-PyP, each of which differs only in the length of its alkyl substituents. Each was active in improving the aerobic growth of yeast lacking SOD (sod1∆) in complete medium, and the efficacy of each mimic was correlated with its characteristic catalytic activity. We also studied the partitioning of these compounds between mitochondria and cytosol and found that the more hydrophobic members of the series accumulated in the mitochondria. Moreover, the degree to which a mimic mitigated the sod1Δ auxotrophic phenotype for lysine relative to its auxotrophic phenotype for methionine depended upon its level of lipophilicity-dependent accumulation inside the mitochondria. We conclude that localization within the cell is an important factor in biological efficacy in addition to the degree of catalytic activity, and we discuss possible explanations for this effect.

Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Redox Biology - Volume 3, 2014, Pages 1–6
نویسندگان
, , , , , , ,