German Federal Ministry for Education and Research
DLR 01ED2010
ドイツ
引用
ジャーナル: Elife / 年: 2022 タイトル: Structure of the HOPS tethering complex, a lysosomal membrane fusion machinery. 著者: Dmitry Shvarev / Jannis Schoppe / Caroline König / Angela Perz / Nadia Füllbrunn / Stephan Kiontke / Lars Langemeyer / Dovile Januliene / Kilian Schnelle / Daniel Kümmel / Florian ...著者: Dmitry Shvarev / Jannis Schoppe / Caroline König / Angela Perz / Nadia Füllbrunn / Stephan Kiontke / Lars Langemeyer / Dovile Januliene / Kilian Schnelle / Daniel Kümmel / Florian Fröhlich / Arne Moeller / Christian Ungermann / 要旨: Lysosomes are essential for cellular recycling, nutrient signaling, autophagy, and pathogenic bacteria and viruses invasion. Lysosomal fusion is fundamental to cell survival and requires HOPS, a ...Lysosomes are essential for cellular recycling, nutrient signaling, autophagy, and pathogenic bacteria and viruses invasion. Lysosomal fusion is fundamental to cell survival and requires HOPS, a conserved heterohexameric tethering complex. On the membranes to be fused, HOPS binds small membrane-associated GTPases and assembles SNAREs for fusion, but how the complex fulfills its function remained speculative. Here, we used cryo-electron microscopy to reveal the structure of HOPS. Unlike previously reported, significant flexibility of HOPS is confined to its extremities, where GTPase binding occurs. The SNARE-binding module is firmly attached to the core, therefore, ideally positioned between the membranes to catalyze fusion. Our data suggest a model for how HOPS fulfills its dual functionality of tethering and fusion and indicate why it is an essential part of the membrane fusion machinery.