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Multilevel regulation of an α-arrestin by glucose depletion controls hexose transporter endocytosis
J. Hovsepian, Q. Defenouillère, V. Albanèse, L. Váchová, C. Garcia, Z. Palková, S. Léon,
Jazyk angličtina Země Spojené státy americké
Typ dokumentu časopisecké články
Freely Accessible Science Journals od 1962 do Před 6 měsíci
PubMed Central od 1962 do Před 6 měsíci
Europe PubMed Central od 1962 do Před 6 měsíci
Open Access Digital Library od 1955-01-25
Open Access Digital Library od 1959-01-01
Open Access Digital Library od 1962-01-01
Odkazy
PubMed
28468835
DOI
10.1083/jcb.201610094
Knihovny.cz E-zdroje
- MeSH
- arrestin genetika metabolismus MeSH
- časové faktory MeSH
- endocytóza * MeSH
- genetická transkripce MeSH
- glukosa nedostatek MeSH
- jaderné proteiny genetika metabolismus MeSH
- mutace MeSH
- protein-serin-threoninkinasy metabolismus MeSH
- proteinfosfatasa 1 metabolismus MeSH
- proteinkinasy závislé na cyklickém AMP metabolismus MeSH
- proteiny 14-3-3 metabolismus MeSH
- proteiny přenášející monosacharidy genetika metabolismus MeSH
- regulace genové exprese u hub MeSH
- represorové proteiny metabolismus MeSH
- Saccharomyces cerevisiae - proteiny genetika metabolismus MeSH
- Saccharomyces cerevisiae genetika metabolismus MeSH
- ubikvitinace MeSH
- Publikační typ
- časopisecké články MeSH
Nutrient availability controls the landscape of nutrient transporters present at the plasma membrane, notably by regulating their ubiquitylation and subsequent endocytosis. In yeast, this involves the Nedd4 ubiquitin ligase Rsp5 and arrestin-related trafficking adaptors (ARTs). ARTs are targeted by signaling pathways and warrant that cargo ubiquitylation and endocytosis appropriately respond to nutritional inputs. Here, we show that glucose deprivation regulates the ART protein Csr2/Art8 at multiple levels to trigger high-affinity glucose transporter endocytosis. Csr2 is transcriptionally induced in these conditions through the AMPK orthologue Snf1 and downstream transcriptional repressors. Upon synthesis, Csr2 becomes activated by ubiquitylation. In contrast, glucose replenishment induces CSR2 transcriptional shutdown and switches Csr2 to an inactive, deubiquitylated form. This glucose-induced deubiquitylation of Csr2 correlates with its phospho-dependent association with 14-3-3 proteins and involves protein kinase A. Thus, two glucose signaling pathways converge onto Csr2 to regulate hexose transporter endocytosis by glucose availability. These data illustrate novel mechanisms by which nutrients modulate ART activity and endocytosis.
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