Crystal structure of Lon protease: molecular architecture of gated entry to a sequestered degradation chamber
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Title
- Crystal structure of Lon protease: molecular architecture of gated entry to a sequestered degradation chamber
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Author(s)
- Cha, Sun-Shin; An, Young Jun; Lee, Chang Ro; Lee, Hyun Sook; Kim, Yeon-Gil; Kim, Sang Jin; Kwon, Kae Kyoung; De Donatis, Gian Marco; Lee, Jung-Hyun; Maurizi, Michael R.; Kang, Sung Gyun
- KIOST Author(s)
- An, Young Jun(안영준); Lee, Hyun Sook(이현숙); Kwon, Kae Kyoung(권개경); Lee, Jung Hyun(이정현); Kang, Sung Gyun(강성균)
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Alternative Author(s)
- 차선신; 안영준; 이창로; 이현숙; 김상진; 권개경; 이정현; 강성균
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Publication Year
- 2010-10
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Abstract
- Lon proteases are distributed in all kingdoms of life and are required for survival of cells under stress. Lon is a tandem fusion of an AAA + molecular chaperone and a protease with a serine-lysine catalytic dyad. We report the 2.0-angstrom resolution crystal structure of Thermococcus onnurineus NA1 Lon (TonLon). The structure is a three-tiered hexagonal cylinder with a large sequestered chamber accessible through an axial channel. Conserved loops extending from the AAA + domain combine with an insertion domain containing the membrane anchor to form an apical domain that serves as a gate governing substrate access to an internal unfolding and degradation chamber. Alternating AAA + domains are in tight- and weak-binding nucleotide states with different domain orientations and intersubunit contacts, reflecting intramolecular dynamics during ATP-driven protein unfolding and translocation. The bowl-shaped proteolytic chamber is contiguous with the chaperone chamber allowing internalized proteins direct access to the proteolytic sites without further gating restrictions. The EMBO Journal (2010) 29, 3520-3530. doi:10.1038/emboj.2010.226; Published online 10 September 2010 Subject Categories: proteins; structural biology
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ISSN
- 0261-4189
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/4023
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DOI
- 10.1038/emboj.2010.226
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Bibliographic Citation
- EMBO JOURNAL, v.29, no.20, pp.3520 - 3530, 2010
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Publisher
- WILEY
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Keywords
- AAA plus protein; ATP-dependent protease; compartmentalized protease; protein quality control; TonLon
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Type
- Article
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Language
- English
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Document Type
- Article
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