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Communication between the cytoskeleton and the nuclear envelope to position the nucleus.

In most eukaryotic cells, the nucleus is localized to a specific location. This highlight article focuses on recent advances describing the mechanisms of nuclear migration and anchorage. Central to nuclear positioning mechanisms is the communication between the nuclear envelope and the cytoskeleton. All three components of the cytoskeleton-microtubules, actin filaments and intermediate filaments-are involved in nuclear positioning to varying degrees in different cell types. KASH proteins on the outer nuclear membrane connect to SUN proteins on the inner nuclear membrane. Together they transfer forces between the cytoskeleton and the nuclear lamina. Once at the outer nuclear membrane, KASH proteins can interact with the cytoskeleton. Nuclear migrations are a component of many cellular migration events and defects in nuclear positioning lead to human diseases, most notably lissencephaly.