MAPRE3 phospho S162
Domain
Composed of two functionally independent domains. The N-terminal domain forms a hydrophobic cleft involved in microtubule binding and the C-terminal is involved in the formation of mutually exclusive complexes with APC and DCTN1.
Function
Plus-end tracking protein (+TIP) that binds to the plus-end of microtubules and regulates the dynamics of the microtubule cytoskeleton (PubMed:19255245, PubMed:28814570). Promotes microtubule growth (PubMed:19255245, PubMed:28814570). May be involved in spindle function by stabilizing microtubules and anchoring them at centrosomes (PubMed:19255245, PubMed:28814570). Also acts as a regulator of minus-end microtubule organization: interacts with the complex formed by AKAP9 and PDE4DIP, leading to recruit CAMSAP2 to the Golgi apparatus, thereby tethering non-centrosomal minus-end microtubules to the Golgi, an important step for polarized cell movement (PubMed:28814570). Promotes elongation of CAMSAP2-decorated microtubule stretches on the minus-end of microtubules (PubMed:28814570).
Sequence Similarities
Belongs to the MAPRE family.
Tissue Specificity
Predominantly expressed in brain and muscle.
Cellular localization
- Cytoplasm
- Cytoskeleton
- Associated with the microtubule network. Detected at the plus end of microtubules.
Alternative names
Microtubule-associated protein RP/EB family member 3, EB1 protein family member 3, End-binding protein 3, RP3, EBF3, EB3, MAPRE3