MAPRE1
Description
The MAPRE1 (microtubule associated protein RP/EB family member 1) is a protein-coding gene located on chromosome 20.
Microtubule-associated protein RP/EB family member 1 is a protein that in humans is encoded by the MAPRE1 gene.
== Function == The protein encoded by this gene was first identified by its binding to the APC (Adenomatous polyposis coli) protein which is often mutated in familial and sporadic forms of colorectal cancer. Immunofluorescence has demonstrated that EB1 localizes to the centrosome, mitotic spindle, and distal tips of cytoplasmic microtubules. Throughout the cell cycle, EB1 proteins situate on the microtubule plus ends, which is why EB1 is categorized as a microtubule plus end tracking protein(+TIP protein). The protein also associates with components of the dynactin complex and the intermediate chain of cytoplasmic dynein. Because of these associations, it is thought that this protein is involved in the regulation of microtubule structures and chromosome stability. This gene is a member of the RP/EB family.
== Interactions == MAPRE1 has been shown to interact with TERF1.
Plus-end tracking protein (+TIP) that binds to the plus-end of microtubules and regulates the dynamics of the microtubule cytoskeleton. Promotes cytoplasmic microtubule nucleation and elongation. Involved in mitotic spindle positioning by stabilizing microtubules and promoting dynamic connection between astral microtubules and the cortex during mitotic chromosome segregation. 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. Promotes elongation of CAMSAP2-decorated microtubule stretches on the minus-end of microtubules. Acts as a regulator of autophagosome transport via interaction with CAMSAP2. Functions downstream of Rho GTPases and DIAPH1 in stable microtubule formation. May play a role in cell migration. {ECO:0000250|UniProtKB:Q61166, ECO:0000269|PubMed:12388762, ECO:0000269|PubMed:16109370, ECO:0000269|PubMed:19632184, ECO:0000269|PubMed:21646404, ECO:0000269|PubMed:23001180, ECO:0000269|PubMed:28726242, ECO:0000269|PubMed:28814570, ECO:0000269|PubMed:34608293}
MAPRE1 is also known as EB1.
