Nestin promotes the phosphorylation-dependent disassembly of vimentin intermediate filaments during mitosis

Ying Hao Chou, Satya Khuon, Harald Herrmann, Robert D. Goldman

Research output: Contribution to journalArticlepeer-review

139 Scopus citations

Abstract

The expression of the intermediate filament (IF) protein nestin is closely associated with rapidly proliferating progenitor cells during neurogenesis and myogenesis, but little is known about its function. In this study, we examine the effects of nestin expression on the assembly state of vimentin IFs in nestin-free cells. Nestin is introduced by transient transfection and is positively correlated with the disassembly of vimentin IFs into nonfilamentous aggregates or particles in mitotic but not interphase cells. This nestin-mediated disassembly of IFs is dependent on the phosphorylation of vimentin by the maturation/M-phase - promoting factor at ser-55 in the amino-terminal head domain. In addition, the disassembly of vimentin IFs during mitosis appears to be a unique feature of nestin-expressing cell types. Furthermore, when the expression of nestin is downregulated by the nestin-specific small interfering RNA in nestin-expressing cells, vimentin IFs remain assembled throughout all stages of mitosis. Previous studies suggest that nonfilamentous vimentin particles are IF precursors and can be transported rapidly between different cytoplasmic compartments along microtubule tracks. On the basis of these observations, we speculate that nestin may play a role in the trafficking and distribution of IF proteins and potentially other cellular factors to daughter cells during progenitor cell division.

Original languageEnglish (US)
Pages (from-to)1468-1478
Number of pages11
JournalMolecular biology of the cell
Volume14
Issue number4
DOIs
StatePublished - Apr 1 2003

ASJC Scopus subject areas

  • Molecular Biology
  • Cell Biology

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