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
- 読解鑑賞行動を規定する要因の研究
- 1A1-G16 産業用ロボットアームを用いた異構造マスタ・スレーブアームの構成(作業をするロボット)
- 樹木医活動10年をふりかえる (特集 緑の資格--樹木医) -- (活躍する「樹木医」20人からの報告)
- 長期透析患児における性格テスト--Y-G性格テストを中心として
- 地域児童施設利用と児童発達