Intracellular calcium levels can regulate Importin-dependent nuclear import

Gurpreet Kaur, Jennifer Dung Ly Huynh, David A Jans

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5 Citations (Scopus)


We previously showed that increased intracellular calcium can modulate Importin (Imp)beta1-dependent nuclear import of SRY-related chromatin remodeling proteins. Here we extend this work to show for the first time that high intracellular calcium inhibits Impalpha/beta1- or Impbeta1-dependent nuclear protein import generally. The basis of this relates to the mislocalisation of the transport factors Impbeta1 and Ran, which show significantly higher nuclear localization in contrast to various other factors, and RCC1, which shows altered subnuclear localisation. The results here establish for the first time that intracellular calcium modulates conventional nuclear import through direct effects on the nuclear transport machinery.
Original languageEnglish
Pages (from-to)812 - 817
Number of pages6
JournalBiochemical and Biophysical Research Communications
Issue number1
Publication statusPublished - 2014

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