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Proc Natl Acad Sci U S A. 1996 Oct 15;93(21):11693-8.

Nuclear LIM interactor, a rhombotin and LIM homeodomain interacting protein, is expressed early in neuronal development.

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Biomedical Sciences Graduate Program, University of California at San Diego, La Jolla 92093-0650, USA.


LIM domain-containing transcription factors, including the LIM-only rhombotins and LIM-homeodomain proteins, are crucial for cell fate determination of erythroid and neuronal lineages. The zinc-binding LIM domains mediate protein-protein interactions, and interactions between nuclear LIM proteins and transcription factors with restricted expression patterns have been demonstrated. We have isolated a novel protein, nuclear LIM interactor (NLI), that specifically associates with a single LIM domain in all nuclear LIM proteins tested. NLI is expressed in the nuclei of diverse neuronal cell types and is coexpressed with a target interactor islet-1 (Isl1) during the initial stages of motor neuron differentiation, suggesting the mutual involvement of these proteins in the differentiation process. The broad range of interactions between NLI and LIM-containing transcription factors suggests the utilization of a common mechanism to impart unique cell fate instructions.

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