J 2022

Specific phosphorylation of microtubule-associated protein 2c by extracellular signal–regulated kinase reduces interactions at its Pro-rich regions

PLUCAROVÁ, Jitka, Séverine JANSEN, Subhash NARASIMHAN, Alice LANÍKOVÁ, Marc LEWITZKY et. al.

Základní údaje

Originální název

Specific phosphorylation of microtubule-associated protein 2c by extracellular signal–regulated kinase reduces interactions at its Pro-rich regions

Autoři

PLUCAROVÁ, Jitka (203 Česká republika, domácí), Séverine JANSEN (250 Francie, domácí), Subhash NARASIMHAN (356 Indie, domácí), Alice LANÍKOVÁ (203 Česká republika, domácí), Marc LEWITZKY, M. Stephan FELLER a Lukáš ŽÍDEK (203 Česká republika, garant, domácí)

Vydání

JOURNAL OF BIOLOGICAL CHEMISTRY, UNITED STATES, ELSEVIER, 2022, 0021-9258

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10608 Biochemistry and molecular biology

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Odkazy

Impakt faktor

Impact factor: 5.157 v roce 2020

Kód RIV

RIV/00216224:14740/22:00126868

Organizační jednotka

Středoevropský technologický institut

UT WoS

000867425500004

Klíčová slova anglicky

NMR; PKA; Src homology 3 domain; cyclin-dependent kinase; extracellular signal–regulated kinase; growth factor receptor-bound protein 2 (GRB2); microtubule-associated protein

Štítky

Příznaky

Mezinárodní význam, Recenzováno
Změněno: 9. 10. 2024 13:18, Ing. Martina Blahová

Anotace

V originále

Microtubule-associated protein 2 (MAP2) is an important neuronal target of extracellular signal–regulated kinase 2 (ERK2) involved in Raf signaling pathways, but mechanistic details of MAP2 phosphorylation are unclear. Here, we used NMR spectroscopy to quantitatively describe the kinetics of phosphorylation of individual serines and threonines in the embryonic MAP2 variant MAP2c. We carried out real-time monitoring of phosphorylation to discover major phosphorylation sites that were not identified in previous studies relying on specific antibodies. Our comparison with the phosphorylation of MAP2c by a model cyclin-dependent kinase CDK2 and with phosphorylation of the MAP2c homolog Tau revealed differences in phosphorylation profiles that explain specificity of regulation of biological functions of MAP2c and Tau. To probe the molecular basis of the regulatory effect of ERK2, we investigated the interactions of phosphorylated and unphosphorylated MAP2c by NMR with single-residue resolution. As ERK2 phosphorylates mostly outside the regions binding microtubules, we studied the binding of proteins other than tubulin, namely regulatory subunit RIIα of cAMP-dependent PKA, adapter protein Grb2, Src homology domain 3 of tyrosine kinases Fyn and Abl, and ERK2 itself. We found ERK2 phosphorylation interfered mostly with binding to proline-rich regions of MAP2c. Furthermore, our NMR experiments in SH-SY5Y neuroblastoma cell lysates showed that the kinetics of dephosphorylation are compatible with in-cell NMR studies and that residues targeted by ERK2 and PKA are efficiently phosphorylated in the cell lysates. Taken together, our results provide a deeper characterization of MAP2c phosphorylation and its effects on interactions with other proteins.

Návaznosti

GA20-12669S, projekt VaV
Název: Interakce určující fyziologické funkce proteinu Microtubule Associated Protein 2c s atomovým rozlišením
Investor: Grantová agentura ČR, Interactions defining physiological functions of Microtubule Associated Protein 2c at atomic resolution
90127, velká výzkumná infrastruktura
Název: CIISB II