ABLIM3 (actin binding LIM protein family member 3) functions as a cytoskeletal regulatory protein that links actin dynamics to cellular signaling pathways. The protein contains four LIM domains and a VHD domain, suggesting it acts as a scaffold protein connecting the actin cytoskeleton to signaling networks 1. ABLIM3 is expressed across multiple tissues including heart, lung, liver, brain, and cerebellum, with predicted nuclear localization 1. In the nervous system, ABLIM3 serves as a molecular brake for synaptic connectivity, particularly in hippocampal dentate granule cells where its downregulation increases connectivity with inhibitory interneurons and maintains memory engrams while reducing fear memory generalization 2. The protein shows disease relevance across multiple conditions: it serves as a potential biomarker for liver toxicity and necrosis 3, exhibits altered DNA methylation patterns in HIV-associated COPD suggesting accelerated aging 4, and shows methylation changes in the nucleus accumbens of smokers 5. Additionally, ABLIM3 variants are associated with pain sensitivity, particularly cold pressor pain in males 6. ABLIM3 appears downregulated in esophageal cancer and may function as a tumor suppressor 7. The gene's conservation across vertebrates suggests fundamental roles in spine development and neural function 8.