2015年4月
A Diffraction-Quality Protein Crystal Processed as an Autophagic Cargo
MOLECULAR CELL
- ,
- ,
- ,
- ,
- ,
- ,
- ,
- ,
- 巻
- 58
- 号
- 1
- 開始ページ
- 186
- 終了ページ
- 193
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.molcel.2015.02.007
- 出版者・発行元
- CELL PRESS
Crystallization of proteins may occur in the cytosol of a living cell, but how a cell responds to intracellular protein crystallization remains unknown. We developed a variant of coral fluorescent protein that forms diffraction-quality crystals within mammalian cells. This expression system allowed the direct determination of its crystal structure at 2.9 angstrom, as well as observation of the crystallization process and cellular responses. The micron-sized crystal, which emerged rapidly, was a pure assembly of properly folded beta-barrels and was recognized as an autophagic cargo that was transferred to lysosomes via a process involving p62 and LC3. Several lines of evidence indicated that autophagy was not required for crystal nucleation or growth. These findings demonstrate that in vivo protein crystals can provide an experimental model to study chemical catalysis. This knowledge may be beneficial for structural biology studies on normal and disease-related protein aggregation.
- リンク情報
- ID情報
-
- DOI : 10.1016/j.molcel.2015.02.007
- ISSN : 1097-2765
- eISSN : 1097-4164
- PubMed ID : 25773597
- Web of Science ID : WOS:000352232000018