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The linker of the nucleoskeleton and cytoskeleton (LINC) complexes are composed of inner nuclear membrane Sad1/UNC-84 (SUN, and outer nuclear membrane Klarsicht/ANC-1/SYNE homology (KASH) proteins. LINC complexes span the physical barrier of the nuclear envelope and regulate the physical connection between the interior of the nucleus and the cytoplasm during various cellular functions. The large cytoplasmic domains of KASH proteins bind to various elements of the cytoskeleton, whereas their 10-30 amino acid KASH domains reside in the perinuclear space (PNS) where they bind to SUN proteins. Interestingly, different KASH domain proteins can independently bind to the same SUN protein to mediate distinct cellular functions. For example, in mammals the SUN protein SUN1 can transiently associate with KASH5 in the PNS to mediate meiotic chromosome movement. Alternatively, SUN1 can …