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Atomic-resolution characterization of microtubule associated protein 2c (MAP2c) and of modifications regulating its function

Project goals

Intrinsically disordered proteins (IDPs) are macromolecules interesting both form biophysical and physiological point of view, but difficult to study by the current biophysical methods. Nuclear magnetic resonance (NMR) is a key technique of atomic-resolution studies of IDPs, but its applicability is limited by a spectral overlap in case of long or highly repetitive amino-acid sequences. Our group recently developed high-resolution NMR methodology that overcomes this limitation and makes studies of large IDPs possible. We propose to apply the methodology to microtubule associated protein 2c (MAP2c), a 49 kDa IDP involved in an early step of neurite initiation. Our goal is to provide a detailed biophysical description of MAP2c, including evaluation of flexibility of individual residues and their propensities to form transient contacts and secondary structures. MAP2c phosphorylation and its importance for binding to the regulatory protein 14-3-3 will be characterized and correlated with the ability of MAP2c interact with F-actin, monitored by cryo-electron microscopy.

Keywords

intrinsically disordered proteinsmicrotubule associated protein 2cprotein 14-3-3phosphorylationactinnuclear magnetic resonanceelectron microscopymass spectrometry

Public support

  • Provider

    Czech Science Foundation

  • Programme

    Standard projects

  • Call for proposals

    Standardní projekty 19 (SGA0201500001)

  • Main participants

    Masarykova univerzita / Středoevropský technologický institut

  • Contest type

    VS - Public tender

  • Contract ID

    15-14974S

Alternative language

  • Project name in Czech

    Charakterizace proteinu MAP2c (microtubule associated protein 2c) a modifikací regulujících jeho funkci s atomovým rozlišením

  • Annotation in Czech

    Přirozeně neuspořádané proteiny (PNP) jsou makromolekuly zajímavé z biofyzikálního i fyziologického pohledu, ale obtížně studovatelné stávajícími biofyzikálními metodami. Nukleární magnetická rezonance (NMR) je klíčovou metodou studia PNP s atomovým rozlišením, ale její použitelnost je omezena překryvy ve spektrech dlouhých nebo vysoce repetitivních aminokyselinových sekvencí. Naše skupina v poslední době vyvinula metodologii NMR s vysokým rozlišením, která překonává toto omezení a umožňuje studovat velké PNP. Navrhujeme použít tuto metodu pro studium proteinu MAP2c (microtubule associated protein 2c), 49 kDa PNP podílejícího se na rané fázi iniciace neuritů. Náš cíl je poskytnout detailní biofyzikální popis MAP2c, zahrnující vyhodnocení flexibility jednotlivých reziduí a jejich tendence tvořit přechodné kontakty a sekundární struktury. Fosforylace MAP2c a jejich význam pro vazbu regulačního proteinu 14-3-3 budou charakterizovány a korelovány se schopností MAP2c interagovat s F-aktinem, sledovanou pomocí kryo-elektronové mikroskopie.

Scientific branches

  • R&D category

    ZV - Basic research

  • CEP classification - main branch

    BO - Biophysics

  • CEP - secondary branch

  • CEP - another secondary branch

  • 10610 - Biophysics

Completed project evaluation

  • Provider evaluation

    U - Uspěl podle zadání (s publikovanými či patentovanými výsledky atd.)

  • Project results evaluation

    Project was devoted to biophysical characterisation of intrinsically disordered protein MAP2c by means of scattering techniques and NMR spectroscopy. Its transient structural properties and peptide backbone dynamics were described. Moreover, phosphorylation sites and its interaction with 14-3-3 protein was characterised. Project results were published in two articles.

Solution timeline

  • Realization period - beginning

    Jan 1, 2015

  • Realization period - end

    Dec 5, 2018

  • Project status

    U - Finished project

  • Latest support payment

    Apr 5, 2017

Data delivery to CEP

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

  • Data delivery code

    CEP19-GA0-GA-U/01:1

  • Data delivery date

    Jun 12, 2019

Finance

  • Total approved costs

    6,460 thou. CZK

  • Public financial support

    6,460 thou. CZK

  • Other public sources

    0 thou. CZK

  • Non public and foreign sources

    0 thou. CZK

Basic information

Recognised costs

6 460 CZK thou.

Public support

6 460 CZK thou.

100%


Provider

Czech Science Foundation

CEP

BO - Biophysics

Solution period

01. 01. 2015 - 05. 12. 2018