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Hsp90 is essential for restoring cellular functions of temperature-sensitive p53 mutant protein but not for stabilization and activation of wild-type p53

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00209805%3A_____%2F05%3A%230000018" target="_blank" >RIV/00209805:_____/05:#0000018 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Hsp90 is essential for restoring cellular functions of temperature-sensitive p53 mutant protein but not for stabilization and activation of wild-type p53

  • Original language description

    The ability of p53 to process cellular signals is abrogated by p53 gene mutations leading to alteration of protein conformation. Hsp90 has been implicated in regulating both wild-type and mutant p53 conformations. Using cell lines that contain human tumor-derived temperature-sensitive p53 mutants we show that Hsp90 is required for both stabilization and reactivation of mutated p53 at the permissive temperature. Mutant reactivation is enhanced by simultaneous treatment with agents that stabilize the reactivated protein and is blocked by geldanamycin, a specific inhibitor of Hsp90 activity. In contrast, Hsp90 is not required for maintaining wild-type p53 or for stabilizing wild-type p53 after treatment with chemotherapeutic agents.

  • Czech name

    Hsp90 je nezbytný pro obnovení buněčné funkce teplotně-senzitivního mutovaného proteinu p53, nikoliv pro stabilizaci a aktivaci wt p53

  • Czech description

    Schopnost p53 účastnit se buněčných signalizací je narušována mutacemi v genu kódující p53, vedoucími ke změnám v konformaci proteinu. Hsp90 se účastní regulace konformace wt i mutovaného proteinu p53. Za použití buněčných línií nesoucí teplotně-senzitivní mutaci p53 jsme prokázali, že Hsp90 je za podmínek permisivní teploty nezbytný pro stabilizaci a reaktivaci mutovaného p53. Reaktivace mutantního proteinu je podporována současným podáváním látek, které protein stabilizují a je blokována geldanamycinem, specifickým inhibitorem Hsp90 aktivity. Naproti tomu Hsp90 není nutný pro udržení a stabilizaci wt p53 po působení chemoterapeutik.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    FD - Oncology and haematology

  • OECD FORD branch

Result continuities

  • Project

    <a href="/en/project/NC7131" target="_blank" >NC7131: Analysis of functional alterations of mutant forms of p53 protein in human cancers.</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2005

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Journal of Biological Chemistry

  • ISSN

    0021-9258

  • e-ISSN

  • Volume of the periodical

    280

  • Issue of the periodical within the volume

    8

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    10

  • Pages from-to

    6682-6691

  • UT code for WoS article

  • EID of the result in the Scopus database