The intracellular trafficking of opioid receptors directed by carboxyl tail and a di-leucine motif in Neuro2A cells

Research output: Contribution to journalArticle

34 Scopus citations

Abstract

The μ- and δ-opioid receptors (MOR and DOR) differ significantly in their intracellular trafficking. MORs recycle back to the cell surface upon agonist treatment, whereas most internalized DORs are targeted to lysosomes for degradation. By exchanging the carboxyl tail domains of MOR and DOR and expressing the receptor chimeras in mouse neuroblastoma Neuro2A cells, it could be demonstrated that the carboxyl tail domain is not the sole determinant in directing the intracellular trafficking in these Neuro2A cells. Deletion of the dileucine motif (Leu245-Leu246) within the third intracellular loop of DOR or the mutation of Leu245 to Met slowed the lysosomal targeting of these δ-opioid receptors. Meanwhile the mutation of Met264 to Leu increased the rate of agonist-induced receptor internalization and the lysosomal targeting of the wild type and the δ-opioid receptor carboxyl tail chimera of the μ-opioid receptor. These studies suggest interplay between a di-leucine motif and the carboxyl tail in the lysosomal targeting of the receptor.

Original languageEnglish (US)
Pages (from-to)36848-36858
Number of pages11
JournalJournal of Biological Chemistry
Volume278
Issue number38
DOIs
StatePublished - Sep 19 2003

Fingerprint Dive into the research topics of 'The intracellular trafficking of opioid receptors directed by carboxyl tail and a di-leucine motif in Neuro2A cells'. Together they form a unique fingerprint.

  • Cite this