Effect of Inhibition of Proteasome-Mediated Proteolysis on Ligninolytic Activities of White-Rot Fungi
スポンサーリンク
概要
- 論文の詳細を見る
It has recently been established that most short- and long-lived cellular proteins (80-90%) are degraded by a highly selective non-lysosomal pathway that requires ATP and a large (~2.5 MDa) multisubunit, multicatalytic proteinase complex known as the 26S proteasome. It degrades many important proteins involved in signaling pathway, in cell cycle control, and in general metabolism, including transcription factors and key metabolic enzymes. Here, we demonstrated all distinct proteasome activities: chymotrypsin-like, trypsin-like, and caspase-like (peptidylglutamyl-peptide hydrolyzing) in mycelial extracts of the white-rot fungi Trametes versicolor and Phlebia radiata by monitoring cleavage of three different fluorogenic peptide substrates: Suc-LLVY-MCA, Z-GGR-MCA, Z-LLE-βNA, respectively. We also found that this cleavage was ATP-dependent. Reagents that inhibit proteasome-mediated protein degradation in intact cells have recently become available, including substrate-related peptide aldehydes. These inhibitors are useful tools to demonstrate that a process exhibits proteasome-dependent biochemical regulation. In the present study, we report that in vivo Cbz-LLLal treatment strongly inhibited all tested proteasome activities and affected ligninolytic activities in nutrient deprived cultures of both fungi.
- 2008-10-28
論文 | ランダム
- 欧米のプラスチック応用開発
- 欧米のプラスチック事情 プラスチック応用開発調査団帰朝報告
- 欧米のプラスチック工業見聞記-プラスチックの機械加工を中心として
- 12. 短下肢装具を保有する脳卒中片麻痺患者の基本動作について
- 悪性線維性組織球腫細胞株における p53を介さない温熱誘導性アポトーシス