Fission yeast arrestin-related trafficking adaptor, Arn1/Any1, is ubiquitinated by Pub1 E3 ligase and regulates endocytosis of Cat1 amino acid transporter

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Fission yeast arrestin-related trafficking adaptor, Arn1/Any1, is ubiquitinated by Pub1 E3 ligase and regulates endocytosis of Cat1 amino acid transporter

The Tsc1-Tsc2 complex homologous to human tuberous sclerosis complex proteins governs amino acid uptake by regulating the expression and intracellular distribution of amino acid transporters in Schizosaccharomyces pombe. Here, we performed a genetic screening for molecules that are involved in amino acid uptake and found Arn1 (also known as Any1). Arn1 is homologous to ART1, an arrestin-related...

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The fission yeast β-arrestin-like protein Any1 is involved in TSC-Rheb signaling and the regulation of amino acid transporters.

Rheb GTPase and the Tsc1-Tsc2 protein complex, which serves as a GTPase-activating protein for Rheb, have crucial roles in the regulation of cell growth in response to extracellular conditions. In Schizosaccharomyces pombe, Rheb and Tsc1-Tsc2 regulate cell cycle progression, the onset of meiosis and the uptake of amino acids. In cells lacking Tsc2 (Δtsc2), the amino acid transporter Aat1, which...

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After endocytosis, membrane proteins can recycle to the cell membrane or be degraded in lysosomes. Cargo ubiquitylation favors their lysosomal targeting and can be regulated by external signals, but the mechanism is ill-defined. Here, we studied the post-endocytic trafficking of Jen1, a yeast monocarboxylate transporter, using microfluidics-assisted live-cell imaging. We show that the ubiquitin...

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ژورنال

عنوان ژورنال: Biology Open

سال: 2014

ISSN: 2046-6390

DOI: 10.1242/bio.20148367