A point mutation in human coilin prevents Cajal body formation.

Abstract excerpt

Coilin is a conserved protein essential for integrity of nuclear membrane-less inclusions called Cajal bodies. Here, we report an amino acid substitution (p.K496E) found in a widely-used human EGFP-coilin construct that has a dominant-negative effect on Cajal body formation. We show that this coilin-K496E variant fails to rescue Cajal bodies in cells lacking endogenous coilin, whereas the wild-type construct...

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