KATNA1 encodes katanin p60, the catalytic subunit of a microtubule-severing complex that cleaves microtubules in an ATP-dependent manner 1. This severing activity is essential for microtubule reorganization during mitosis and neuronal development, facilitating poleward microtubule flux during mitosis and axonal growth through microtubule transport into neuronal processes 2. KATNA1 expression is tightly regulated at multiple levels: p53 acts as a transcriptional activator of KATNA1 3, while miR-124-3p provides posttranscriptional regulation 1, and the transcription factor Elk1 differentially regulates KATNA1 through both transcriptional and post-transcriptional mechanisms 4. Post-translationally, SUMOylation at lysine K330 enhances KATNA1 catalytic activity and promotes neurite outgrowth 2. Functionally, KATNA1 localizes to cytokinetic midbodies and functions in cytokinetic abscission through interactions with CHMP3 5. In ovarian cancer, elevated KATNA1 expression significantly correlates with improved overall survival 6, while altered KATNA1 levels have been associated with Alzheimer's disease pathology 7. These regulatory mechanisms ensure balanced KATNA1 expression critical for both cell survival and differentiation processes.