Glutamine amidotransferase-like class 1 domain-containing protein 1
キーワード
RNA BINDING PROTEIN / FERRY complex / RNA binding / RNA transport / early endosome
機能・相同性
glyoxalase III activity / methylglyoxal catabolic process to D-lactate via S-lactoyl-glutathione / Class I glutamine amidotransferase-like / extracellular exosome / cytoplasm / Glutamine amidotransferase-like class 1 domain-containing protein 1
ジャーナル: Mol Cell / 年: 2023 タイトル: Structural basis of mRNA binding by the human FERRY Rab5 effector complex. 著者: Dennis Quentin / Jan S Schuhmacher / Björn U Klink / Jeni Lauer / Tanvir R Shaikh / Pim J Huis In 't Veld / Luisa M Welp / Henning Urlaub / Marino Zerial / Stefan Raunser / 要旨: The pentameric FERRY Rab5 effector complex is a molecular link between mRNA and early endosomes in mRNA intracellular distribution. Here, we determine the cryo-EM structure of human FERRY. It reveals ...The pentameric FERRY Rab5 effector complex is a molecular link between mRNA and early endosomes in mRNA intracellular distribution. Here, we determine the cryo-EM structure of human FERRY. It reveals a unique clamp-like architecture that bears no resemblance to any known structure of Rab effectors. A combination of functional and mutational studies reveals that while the Fy-2 C-terminal coiled-coil acts as binding region for Fy-1/3 and Rab5, both coiled-coils and Fy-5 concur to bind mRNA. Mutations causing truncations of Fy-2 in patients with neurological disorders impair Rab5 binding or FERRY complex assembly. Thus, Fy-2 serves as a binding hub connecting all five complex subunits and mediating the binding to mRNA and early endosomes via Rab5. Our study provides mechanistic insights into long-distance mRNA transport and demonstrates that the particular architecture of FERRY is closely linked to a previously undescribed mode of RNA binding, involving coiled-coil domains.