MICAL1 (Microtubule Associated Monooxygenase, Calponin and LIM domain containing 1) is a redox enzyme that functions as a critical regulator of actin cytoskeleton dynamics through oxidative depolymerization of F-actin filaments 12. The protein promotes F-actin disassembly by oxidizing specific methionine residues on actin to methionine-sulfoxide, preventing repolymerization, while also generating hydrogen peroxide in the absence of actin substrate 23. MICAL1 activity is tightly controlled through autoinhibition, mediated by intramolecular interactions between its N-terminal catalytic and C-terminal coiled-coil domains, with activation requiring allosteric changes and regulatory protein binding 1. The enzyme plays diverse physiological roles, including facilitating HIV-1 viral budding by locally depolymerizing cortical actin at plasma membrane budding sites 2, and promoting mechano-dependent platelet adhesion by enabling VWF-GPIbα interactions under shear conditions 4. MICAL1 exhibits tumor suppressor functions in colorectal cancer by inhibiting cell migration and proliferation through regulation of the EGR1/β-catenin signaling pathway 5, while showing elevated expression in breast cancer associated with poor prognosis 3. Additionally, activating mutations in MICAL1 have been linked to autosomal dominant lateral temporal epilepsy, suggesting roles in neuronal development and axonal guidance 6.