Nufip1 is a ribosome receptor for starvation-induced ribophagy

Gregory A. Wyant, Monther Abu-Remaileh, Evgeni M. Frenkel, Nouf N. Laqtom, Vimisha Dharamdasani, Caroline A. Lewis, Sze Ham Chan, Ivonne Heinze, Alessandro Ori, David M. Sabatini

Research output: Contribution to journalArticlepeer-review

231 Scopus citations

Abstract

The lysosome degrades and recycles macromolecules, signals to the master growth regulator mTORC1 [mechanistic target of rapamycin (mTOR) complex 1], and is associated with human disease.We performed quantitative proteomic analyses of rapidly isolated lysosomes and found that nutrient levels and mTOR dynamically modulate the lysosomal proteome. Upon mTORC1 inhibition, NUFIP1 (nuclear fragile Xmental retardation-interacting protein 1) redistributes from the nucleus to autophagosomes and lysosomes. Upon these conditions, NUFIP1 interacts with ribosomes and delivers them to autophagosomes by directly binding to microtubule-associated proteins 1A/1B light chain 3B (LC3B).The starvation-induced degradation of ribosomes via autophagy (ribophagy) depends on the capacity of NUFIP1 to bind LC3B and promotes cell survival.We propose that NUFIP1 is a receptor for the selective autophagy of ribosomes.
Original languageEnglish (US)
Pages (from-to)751-758
Number of pages8
JournalSCIENCE
Volume360
Issue number6390
DOIs
StatePublished - May 18 2018
Externally publishedYes

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