The LIM-domain binding protein, binds to the LIM domain Pfam:PF00412 of LIM homeodomain proteins which are transcriptional regulators of development. Nuclear LIM interactor (NLI) / LIM domain-binding protein 1 (LDB1) Swiss:P70662 is located in the nuclei of neuronal cells during development, it is co-expressed with Isl1 in early motor neuron differentiation and has a suggested role in the Isl1 dependent development of motor neurons [4]. It is suggested that these proteins act synergistically to enhance transcriptional efficiency by acting as co-factors for LIM homeodomain and Otx class transcription factors both of which have essential roles in development [2]. The Drosophila protein Chip Swiss:O18353 is required for segmentation and activity of a remote wing margin enhancer [1]. Chip is a ubiquitous chromosomal factor required for normal expression of diverse genes at many stages of development [1]. It is suggested that Chip cooperates with different LIM domain proteins and other factors to structurally support remote enhancer-promoter interactions [1].

1: Chip, a widely expressed chromosomal protein required for segmentation and activity of a remote wing margin enhancer in Drosophila. Morcillo P, Rosen C, Baylies MK, Dorsett D; Genes Dev 1997;11:2729-2740. PMID:9334334

2: A family of LIM domain-associated cofactors confer transcriptional synergism between LIM and Otx homeodomain proteins. Bach I, Carriere C, Ostendorff HP, Andersen B, Rosenfeld MG; Genes Dev 1997;11:1370-1380. PMID:9192866

3: Interactions of the LIM-domain-binding factor Ldb1 with LIM homeodomain proteins. Agulnick AD, Taira M, Breen JJ, Tanaka T, Dawid IB, Westphal H; Nature 1996;384:270-272. PMID:8918878

4: Nuclear LIM interactor, a rhombotin and LIM homeodomain interacting protein, is expressed early in neuronal development. Jurata LW, Kenny DA, Gill GN; Proc Natl Acad Sci U S A 1996;93:11693-11698. PMID:8876198