J 2024

Structural basis of binding the unique N-terminal domain of microtubule-associated protein 2c to proteins regulating kinases of signaling pathways

BARTOŠÍK, Viktor; Jitka PLUCAROVÁ; Alice LANÍKOVÁ; Zuzana JANÁČKOVÁ; Petr PADRTA et. al.

Basic information

Original name

Structural basis of binding the unique N-terminal domain of microtubule-associated protein 2c to proteins regulating kinases of signaling pathways

Authors

BARTOŠÍK, Viktor (203 Czech Republic, belonging to the institution); Jitka PLUCAROVÁ (203 Czech Republic, belonging to the institution); Alice LANÍKOVÁ (203 Czech Republic, belonging to the institution); Zuzana JANÁČKOVÁ (203 Czech Republic, belonging to the institution); Petr PADRTA (203 Czech Republic, belonging to the institution); Séverine JANSEN (250 France, belonging to the institution); Tobias GRUBER; Vojtěch VAŘEČKA (203 Czech Republic, belonging to the institution); Stephan M FELLER and Lukáš ŽÍDEK (203 Czech Republic, belonging to the institution)

Edition

International Journal of Biological Chemistry, AMSTERDAM, ANSInet, 2024, 0021-9258

Other information

Language

English

Type of outcome

Article in a journal

Field of Study

10608 Biochemistry and molecular biology

Country of publisher

Netherlands

Confidentiality degree

is not subject to a state or trade secret

References:

Impact factor

Impact factor: 4.000 in 2023

RIV identification code

RIV/00216224:14740/24:00138072

Organization unit

Central European Institute of Technology

UT WoS

001365739800001

EID Scopus

2-s2.0-85200983503

Keywords in English

GENERAL FORCE-FIELD; A ANCHORING PROTEIN; TYROSINE PHOSPHORYLATION; SECONDARY STRUCTURE; DIPOLAR COUPLINGS; HETERONUCLEAR NMR; AKAP SPECIFICITY; MAP2 EXPRESSION; LARGER PROTEINS; SH2 DOMAIN

Tags

International impact, Reviewed
Changed: 3/6/2025 12:29, Mgr. Eva Dubská

Abstract

V originále

Isoforms of microtubule-associated protein 2 (MAP2) differ from their homolog Tau in the sequence and interactions of the N-terminal region. Binding of the N-terminal region of MAP2c (N-MAP2c) to the dimerization/docking domains of the regulatory subunit RIIa of cAMP-dependent protein kinase (RIIDD2) and to the Src-homology domain 2 (SH2) of growth factor receptor-bound protein 2 (Grb2) have been described long time ago. However, the structural features of the complexes remained unknown due to the disordered nature of MAP2. Here, we provide structural description of the complexes. We have solved solution structure of N-MAP2c in complex with RIIDD2, confirming formation of an amphiphilic a-helix of MAP2c upon binding, defining orientation of the ahelix in the complex and showing that its binding register differs from previous predictions. Using chemical shift mapping, we characterized the binding interface of SH2-Grb2 and rat MAP2c phosphorylated by the tyrosine kinase Fyn in their complex and proposed a model explaining differences between SH2-Grb2 complexes with rat MAP2c and phosphopeptides with a Grb2-specific sequence. The results provide the structural basis of a potential role of MAP2 in regulating cAMPdependent phosphorylation cascade via interactions with RIIDD2 and Ras signaling pathway via interactions with SH2

Links

EF18_046/0015974, research and development project
Name: Modernizace České infrastruktury pro integrativní strukturní biologii
GA20-12669S, research and development project
Name: Interakce určující fyziologické funkce proteinu Microtubule Associated Protein 2c s atomovým rozlišením
Investor: Czech Science Foundation
MUNI/A/1641/2023, interní kód MU
Name: Struktura a dynamika biopolymerů
Investor: Masaryk University
90242, large research infrastructures
Name: CIISB III