Download MendeleyCharacterization of multiple binding sites on microtubule associated protein 2c recognized by dimeric and monomeric 14-3-3 zeta.
Jansen, S., Narasimhan, S., Cabre Fernandez, P., Ilkovicova, L., Kozelekova, A., Kralova, K., Hritz, J., Zidek, L.(2025) FEBS J 292: 1991-2016
- PubMed: 39877981
- DOI: https://doi.org/10.1111/febs.17405
- Primary Citation of Related Structures:
9FUM, 9FVL - PubMed Abstract:
Microtubule associated protein 2 (MAP2) interacts with the regulatory protein 14-3-3ζ in a cAMP-dependent protein kinase (PKA) phosphorylation dependent manner. Using selective phosphorylation, calorimetry, nuclear magnetic resonance, chemical crosslinking, and X-ray crystallography, we characterized interactions of 14-3-3ζ with various binding regions of MAP2c. Although PKA phosphorylation increases the affinity of MAP2c for 14-3-3ζ in the proline rich region and C-terminal domain, unphosphorylated MAP2c also binds the dimeric 14-3-3ζ via its microtubule binding domain and variable central domain. Monomerization of 14-3-3ζ leads to the loss of affinity for the unphosphorylated residues. In neuroblastoma cell extract, MAP2c is heavily phosphorylated by PKA and the proline kinase ERK2. Although 14-3-3ζ dimer or monomer do not interact with the residues phosphorylated by ERK2, ERK2 phosphorylation of MAP2c in the C-terminal domain reduces the binding of MAP2c to both oligomeric variants of 14-3-3ζ.
- Central European Institute of Technology, Masaryk University, Brno, Czech Republic.
Organizational Affiliation:
