- EMDB-3274: Proteolytically inactive Human mitochondrial Lon protease incubat... -
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基本情報
登録情報
データベース: EMDB / ID: EMD-3274
タイトル
Proteolytically inactive Human mitochondrial Lon protease incubated with ADP
マップデータ
Proteolytically inactive Human Lon protease incubated with ADP
試料
試料: Proteolytically inactive Human mitochondrial Lon protease (S855A) incubated with ADP
タンパク質・ペプチド: Human mitochondrial Lon protease S855A
キーワード
AAA / Lon protease / Human
機能・相同性
機能・相同性情報
oxidation-dependent protein catabolic process / response to aluminum ion / PH domain binding / mitochondrial protein catabolic process / endopeptidase La / G-quadruplex DNA binding / mitochondrial DNA metabolic process / : / ATP-dependent peptidase activity / protein quality control for misfolded or incompletely synthesized proteins ...oxidation-dependent protein catabolic process / response to aluminum ion / PH domain binding / mitochondrial protein catabolic process / endopeptidase La / G-quadruplex DNA binding / mitochondrial DNA metabolic process / : / ATP-dependent peptidase activity / protein quality control for misfolded or incompletely synthesized proteins / mitochondrial nucleoid / insulin receptor substrate binding / Mitochondrial unfolded protein response (UPRmt) / chaperone-mediated protein complex assembly / response to hormone / DNA polymerase binding / Mitochondrial protein degradation / negative regulation of insulin receptor signaling pathway / proteolysis involved in protein catabolic process / mitochondrion organization / protein catabolic process / ADP binding / single-stranded DNA binding / cellular response to oxidative stress / sequence-specific DNA binding / response to hypoxia / single-stranded RNA binding / mitochondrial matrix / serine-type endopeptidase activity / ATP hydrolysis activity / mitochondrion / nucleoplasm / ATP binding / identical protein binding / membrane / cytosol 類似検索 - 分子機能
Lon protease homologue, chloroplastic/mitochondrial / : / Lon protease, bacterial/eukaryotic-type / Lon protease AAA+ ATPase lid domain / Peptidase S16, active site / ATP-dependent serine proteases, lon family, serine active site. / Lon proteolytic domain profile. / Peptidase S16, Lon proteolytic domain / Lon protease / Lon protease (S16) C-terminal proteolytic domain ...Lon protease homologue, chloroplastic/mitochondrial / : / Lon protease, bacterial/eukaryotic-type / Lon protease AAA+ ATPase lid domain / Peptidase S16, active site / ATP-dependent serine proteases, lon family, serine active site. / Lon proteolytic domain profile. / Peptidase S16, Lon proteolytic domain / Lon protease / Lon protease (S16) C-terminal proteolytic domain / Lon N-terminal domain profile. / Lon protease, N-terminal domain / Lon protease, N-terminal domain superfamily / ATP-dependent protease La (LON) substrate-binding domain / Found in ATP-dependent protease La (LON) / PUA-like superfamily / ATPase family associated with various cellular activities (AAA) / ATPase, AAA-type, core / Ribosomal protein S5 domain 2-type fold, subgroup / Ribosomal protein S5 domain 2-type 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: Sci Rep / 年: 2016 タイトル: The N-terminal domain plays a crucial role in the structure of a full-length human mitochondrial Lon protease. 著者: Sami Kereïche / Lubomír Kováčik / Jan Bednár / Vladimír Pevala / Nina Kunová / Gabriela Ondrovičová / Jacob Bauer / Ľuboš Ambro / Jana Bellová / Eva Kutejová / Ivan Raška / 要旨: Lon is an essential, multitasking AAA(+) protease regulating many cellular processes in species across all kingdoms of life. Altered expression levels of the human mitochondrial Lon protease (hLon) ...Lon is an essential, multitasking AAA(+) protease regulating many cellular processes in species across all kingdoms of life. Altered expression levels of the human mitochondrial Lon protease (hLon) are linked to serious diseases including myopathies, paraplegia, and cancer. Here, we present the first 3D structure of full-length hLon using cryo-electron microscopy. hLon has a unique three-dimensional structure, in which the proteolytic and ATP-binding domains (AP-domain) form a hexameric chamber, while the N-terminal domain is arranged as a trimer of dimers. These two domains are linked by a narrow trimeric channel composed likely of coiled-coil helices. In the presence of AMP-PNP, the AP-domain has a closed-ring conformation and its N-terminal entry gate appears closed, but in ADP binding, it switches to a lock-washer conformation and its N-terminal gate opens, which is accompanied by a rearrangement of the N-terminal domain. We have also found that both the enzymatic activities and the 3D structure of a hLon mutant lacking the first 156 amino acids are severely disturbed, showing that hLon's N-terminal domains are crucial for the overall structure of the hLon, maintaining a conformation allowing its proper functioning.