HAUS8 is a core subunit of the augmin complex that orchestrates multiple cellular processes centered on microtubule dynamics and organization. Functionally, HAUS8 contributes to mitotic spindle assembly, centrosome integrity maintenance, and cytokinesis completion as part of the eight-subunit HAUS augmin-like complex 1. Mechanistically, HAUS8 contains nuclear localization sequences that directly interact with importin-α and importin-β, overlapping with the microtubule-binding site 1. This interaction is regulated by RanGTP, which releases augmin from importin inhibition, allowing augmin to bind microtubules and promote branched microtubule nucleation—the pathway generating most spindle microtubules 2. Additionally, HAUS8 contains a disordered N-terminal binding domain that, together with the Haus6 CH domain, establishes the shallow branch angle characteristic of augmin-mediated nucleation 3. Beyond spindle assembly, HAUS8 regulates microtubule poleward flux dynamics critical for chromosome 19 and segregation fidelity 4. Disease relevance extends to cancer: high HAUS8 expression correlates with poor prognosis in low-grade glioma and serves as a prognostic biomarker in clear cell renal cell carcinoma 56. Additionally, HAUS8 positively regulates RLR-VISA antiviral signaling by promoting polyubiquitination of VISA complex components, enhancing interferon-β production 7. Clinically, HAUS8 represents a potential therapeutic target for cancer treatment and a marker for prognostic stratification.