Calmodulin-regulated spectrin-associated protein 3 (CAMSAP3)

Key microtubule-organizing protein which specifically binds the minus-end of non-centrosomal microtubules and modulates their dynamics and organization (PubMed:19041755, PubMed:23169647). Acts on free microtubule minus-ends which aren't restricted by microtubule-nucleating proteins or other factors and shields microtubule minus-ends from depolymerization (PubMed:24486153).

Additionally, it also decreases the speed of microtubule polymerization (PubMed:24486153). Required for the biogenesis and the upkeep of zonula adherens by anchoring the minus-end of microtubules into zonula adherens and by recruiting the kinesin KIFC3 to those junctional sites (PubMed:19041755).