MZT1 (mitotic spindle organizing protein 1) is a highly conserved microprotein essential for γ-tubulin ring complex (γ-TuRC) function and centrosomal recruitment 12. The protein directly binds to multiple γ-TuRC subunits including GCP3 and GCP6 through an intercalative binding mode, forming structural modules within the γ-TuRC lumenal bridge 1. MZT1's promiscuous binding to γ-TuRC components is crucial for specific subcellular targeting and regulation of microtubule nucleation at different cell cycle stages 2. Mechanistically, MZT1 functions as an "oligomerization chaperone" that cooperatively promotes γ-TuSC oligomerization into nucleation-competent rings and stabilizes GCP3 in an interaction-competent form 34. At centrosomes, MZT1 works with adapter proteins like NEDD1 to anchor γ-TuRC to pericentriolar material, enabling proper spindle formation 5. Loss of MZT1 leads to failures in γ-TuRC recruitment, defective cell division, and cell death 6. Recent studies also implicate MZT1 in cancer biology, where it promotes gastric cancer cell survival under glucose starvation by preventing NEDD1 ubiquitination 7. The protein's tissue-specific expression patterns suggest additional specialized roles in multicellular organisms 6.