Nucleus-specific translation and assembly of acetylcholinesterase in multinucleated muscle cells

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34 Scopus citations

Abstract

Multinucleated skeletal muscle fibers synthesize cell surface and secreted oligomeric forms of acetylcholinesterase (AChE) that accumulate at specialized locations on the cell surface, such as sites of nerve-muscle contact. Using allelic variants of the AChE polypeptide chains as genetic markers, we show that nuclei homozygous for either the α or β alleles residing in chimeric myotubes preferentially translate their AChE mRNAs on their respective ERs. These results indicate that the events of transcription, translation, and assembly of this membrane protein are compartmentalized into nuclear domains in multinucleated cells, and provide the structural basis for the possible localized expression and regulation of synaptic components at the neuromuscular junctions of vertebrate skeletal muscle fibers.

Original languageEnglish (US)
Pages (from-to)715-719
Number of pages5
JournalJournal of Cell Biology
Volume110
Issue number3
DOIs
StatePublished - 1990

ASJC Scopus subject areas

  • Cell Biology

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