There are approximately 40 known eukaryotic LIM proteins, so named for the LIM domains they contain. LIM domains are highly conserved cysteine-rich structures containing 2 zinc fingers. Although zinc fingers usually function by binding to DNA or RNA, the LIM motif probably mediates protein-protein interactions. LIM kinase-1 and LIM kinase-2 belong to a small subfamily with a unique combination of 2 N-terminal LIM motifs, a central PDZ domain, and a C-terminalprotein kinase domain. LIMK1 is likely to be a component of an intracellular signaling pathway and may be involved in brain development.[7]
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Edwards DC, Sanders LC, Bokoch GM, Gill GN (1999). "Activation of LIM-kinase by Pak1 couples Rac/Cdc42 GTPase signalling to actin cytoskeletal dynamics". Nat. Cell Biol. 1 (5): 253–9. doi:10.1038/12963. PMID10559936. S2CID25250183.
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