The crystal structure of Lon Protease: Molecular Architecture of Gated Entry to A Sequestered Degradation Chamber
DC Field | Value | Language |
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dc.contributor.author | 안영준 | - |
dc.contributor.author | 정창숙 | - |
dc.contributor.author | 강성균 | - |
dc.contributor.author | 차선신 | - |
dc.date.accessioned | 2020-07-16T15:32:17Z | - |
dc.date.available | 2020-07-16T15:32:17Z | - |
dc.date.created | 2020-02-11 | - |
dc.date.issued | 2011-06-13 | - |
dc.identifier.uri | https://sciwatch.kiost.ac.kr/handle/2020.kiost/28302 | - |
dc.description.abstract | The ATP-dependent Lon protease has orthologs distributed in all kingdoms of life and is required for survival when cells are subjected to various stress conditions. Lon is a tandem fusion of a molecular chaperone belonging to the AAA+ family and a protease with a serine-lysine catalytic dyad. Here, we report the 2.0 Å resolution crystal structure of the Thermococcus onnurineus NA1 Lon (TonLon). The structure is a three-tiered hexagonal cylinder with a sequestered internal proteolytic chamber accessible through a restricted channel through the AAA+ domains. Conserved axial loops together with an insertion domain containing the membrane anchor comprise a domain positioned on the apical surface of the AAA+ ring that serves as a gate to regulate substrate access to the internal unfolding and degradation chambers. Alternating AAA+ domains in the hexameric ring exist in tight- and weak-binding nucleotide states, displaying different domain orientations and intersubunit contacts, reflective of the ATP hydrolysis-coupled motions driving protein unfolding and translocation. The bowl-shaped proteolytic chamber is contiguous with the chamber formed by the AAA+ domains, and consequently internalized proteins can directly access the proteolytic sites with no further gating restrictions. The structure suggests a model by which Lon can degrade unfolded proteins and small folded proteins or prot | - |
dc.description.uri | 1 | - |
dc.language | English | - |
dc.publisher | 대한미생물학회 | - |
dc.relation.isPartOf | 2011 international meeting of the microbiological society of korea | - |
dc.title | The crystal structure of Lon Protease: Molecular Architecture of Gated Entry to A Sequestered Degradation Chamber | - |
dc.title.alternative | The crystal structure of hexameric Lon Protease: Molecular Architecture of Gated Entry to A Sequestered Degradation Chamber | - |
dc.type | Conference | - |
dc.citation.conferencePlace | KO | - |
dc.citation.title | 2011 international meeting of the microbiological society of korea | - |
dc.contributor.alternativeName | 안영준 | - |
dc.contributor.alternativeName | 정창숙 | - |
dc.contributor.alternativeName | 강성균 | - |
dc.contributor.alternativeName | 차선신 | - |
dc.identifier.bibliographicCitation | 2011 international meeting of the microbiological society of korea | - |
dc.description.journalClass | 1 | - |