タンパク質・ペプチド: Prokaryotic ubiquitin-like protein Pup
リガンド: ADENOSINE-5'-TRIPHOSPHATE
リガンド: MAGNESIUM ION
リガンド: ADENOSINE-5'-DIPHOSPHATE
キーワード
AAA motor / ATPAse / mycobacterium / proteasome activator / 20S CP / CYTOSOLIC PROTEIN
機能・相同性
機能・相同性情報
protein pupylation / proteasome binding / proteasomal protein catabolic process / proteasome complex / modification-dependent protein catabolic process / protein tag activity / ATP hydrolysis activity / ATP binding 類似検索 - 分子機能
Prokaryotic ubiquitin-like protein Pup / Pup-like protein / Proteasome ATPase / Proteasomal ATPase, N-terminal OB domain / Proteasomal ATPase OB N-terminal domain / Proteasomal ATPase OB C-terminal domain / Proteasomal ATPase OB C-terminal domain / : / ATPase, AAA-type, conserved site / AAA-protein family signature. ...Prokaryotic ubiquitin-like protein Pup / Pup-like protein / Proteasome ATPase / Proteasomal ATPase, N-terminal OB domain / Proteasomal ATPase OB N-terminal domain / Proteasomal ATPase OB C-terminal domain / Proteasomal ATPase OB C-terminal domain / : / ATPase, AAA-type, conserved site / AAA-protein family signature. / ATPase family associated with various cellular activities (AAA) / ATPase, AAA-type, core / Nucleic acid-binding, OB-fold / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / P-loop containing nucleoside triphosphate hydrolase 類似検索 - ドメイン・相同性
ジャーナル: Nat Commun / 年: 2022 タイトル: Structural basis of prokaryotic ubiquitin-like protein engagement and translocation by the mycobacterial Mpa-proteasome complex. 著者: Mikhail Kavalchuk / Ahmad Jomaa / Andreas U Müller / Eilika Weber-Ban / 要旨: Proteasomes are present in eukaryotes, archaea and Actinobacteria, including the human pathogen Mycobacterium tuberculosis, where proteasomal degradation supports persistence inside the host. In ...Proteasomes are present in eukaryotes, archaea and Actinobacteria, including the human pathogen Mycobacterium tuberculosis, where proteasomal degradation supports persistence inside the host. In mycobacteria and other members of Actinobacteria, prokaryotic ubiquitin-like protein (Pup) serves as a degradation tag post-translationally conjugated to target proteins for their recruitment to the mycobacterial proteasome ATPase (Mpa). Here, we use single-particle cryo-electron microscopy to determine the structure of Mpa in complex with the 20S core particle at an early stage of pupylated substrate recruitment, shedding light on the mechanism of substrate translocation. Two conformational states of Mpa show how substrate is translocated stepwise towards the degradation chamber of the proteasome core particle. We also demonstrate, in vitro and in vivo, the importance of a structural feature in Mpa that allows formation of alternating charge-complementary interactions with the proteasome resulting in radial, rail-guided movements during the ATPase conformational cycle.