ジャーナル: EMBO Rep / 年: 2016 タイトル: Higher-order assemblies of oligomeric cargo receptor complexes form the membrane scaffold of the Cvt vesicle. 著者: Chiara Bertipaglia / Sarah Schneider / Arjen J Jakobi / Abul K Tarafder / Yury S Bykov / Andrea Picco / Wanda Kukulski / Jan Kosinski / Wim Jh Hagen / Arvind C Ravichandran / Matthias ...著者: Chiara Bertipaglia / Sarah Schneider / Arjen J Jakobi / Abul K Tarafder / Yury S Bykov / Andrea Picco / Wanda Kukulski / Jan Kosinski / Wim Jh Hagen / Arvind C Ravichandran / Matthias Wilmanns / Marko Kaksonen / John Ag Briggs / Carsten Sachse / 要旨: Selective autophagy is the mechanism by which large cargos are specifically sequestered for degradation. The structural details of cargo and receptor assembly giving rise to autophagic vesicles ...Selective autophagy is the mechanism by which large cargos are specifically sequestered for degradation. The structural details of cargo and receptor assembly giving rise to autophagic vesicles remain to be elucidated. We utilize the yeast cytoplasm-to-vacuole targeting (Cvt) pathway, a prototype of selective autophagy, together with a multi-scale analysis approach to study the molecular structure of Cvt vesicles. We report the oligomeric nature of the major Cvt cargo Ape1 with a combined 2.8 Å X-ray and negative stain EM structure, as well as the secondary cargo Ams1 with a 6.3 Å cryo-EM structure. We show that the major dodecameric cargo prApe1 exhibits a tendency to form higher-order chain structures that are broken upon interaction with the receptor Atg19 in vitro The stoichiometry of these cargo-receptor complexes is key to maintaining the size of the Cvt aggregate in vivo Using correlative light and electron microscopy, we further visualize key stages of Cvt vesicle biogenesis. Our findings suggest that Atg19 interaction limits Ape1 aggregate size while serving as a vehicle for vacuolar delivery of tetrameric Ams1.
#203 - 2016年11月 アミノペプチダーゼ1とオートファジー (Aminopeptidase 1 and Autophagy) 類似性 (3)
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A: Aminopeptidase-like protein E: Aminopeptidase-like protein F: Aminopeptidase-like protein B: Aminopeptidase-like protein C: Aminopeptidase-like protein D: Aminopeptidase-like protein ヘテロ分子
A: Aminopeptidase-like protein E: Aminopeptidase-like protein F: Aminopeptidase-like protein B: Aminopeptidase-like protein C: Aminopeptidase-like protein D: Aminopeptidase-like protein ヘテロ分子
A: Aminopeptidase-like protein E: Aminopeptidase-like protein F: Aminopeptidase-like protein B: Aminopeptidase-like protein C: Aminopeptidase-like protein D: Aminopeptidase-like protein ヘテロ分子
温度: 277 K / 手法: 蒸気拡散法, ハンギングドロップ法 / pH: 6.6 詳細: PROTEIN BUFFER: 2.0-3.0 mg/ml in 50 mM Tris-HCl pH 7.5, 50 mM NaCl; RESERVOIR BUFFER: 100 mM Hepes, pH 6.6, 4 M sodium formate