Lamin-dependent localization of UNC-84, a protein required for nuclear migration in Caenorhabditis elegans

Kenneth K. Lee, Daniel Starr, Merav Cohen, Jun Liu, Min Han, Katherine L. Wilson, Yosef Gruenbaum

Research output: Contribution to journalArticle

Abstract

Mutations in the Caenorhabditis elegans unc-84 gene cause defects in nuclear migration and anchoring. We show that endogenous UNC-84 protein colocalizes with Ce-lamin at the nuclear envelope and that the envelope localization of UNC-84 requires Ce-lamin. We also show that during mitosis, UNC-84 remains at the nuclear periphery until late anaphase, similar to known inner nuclear membrane proteins. UNC-84 protein is first detected at the 26-cell stage and thereafter is present in most cells during development and in adults. UNC-84 is properly expressed in unc-83 and anc-1 lines, which have phenotypes similar to unc-84, suggesting that neither the expression nor nuclear envelope localization of UNC-84 depends on UNC-83 or ANC-1 proteins. The envelope localization of Ce-lamin, Ce-emerin, Ce-MAN1, and nucleoporins are unaffected by the loss of UNC-84. UNC-84 is not required for centrosome attachment to the nucleus because centrosomes are localized normally in unc-84 hyp7 cells despite a nuclear migration defect. Models for UNC-84 localization are discussed.

Original languageEnglish (US)
Pages (from-to)892-901
Number of pages10
JournalMolecular biology of the cell
Volume13
Issue number3
DOIs
StatePublished - Apr 6 2002

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ASJC Scopus subject areas

  • Molecular Biology
  • Cell Biology

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