Главная страница Карта сайта Контактная информация




Главная » Наука » Публикации »
 

 

Cell Cycle. 2008 Dec 15;7(24):3943-6. Epub 2008 Dec 12. PubMed

Unexpected link between anaphase promoting complex and the toxicity of expanded polyglutamines expressed in yeast.

Bocharova, N. A.; Sokolov, S. S.; Knorre, D. A.; Skulachev, V. P.; Severin, F. F.

Protein aggregation is intimately linked to a number of neurodegenerative diseases. Expansion of the huntingtin polyglutamine-rich domain causes protein aggregation and neuronal degeneration. Recently we found that, similar to neurons, yeast expressing the expanded domain show markers of programmed cell death. Here we showed that deletion of yeast metacaspase gene YCA1 partly rescues the toxic effect of the domain overexpression. We also performed genetic screen for other genes deletions alleviating the toxic effect and found ASE1. Ase1 is a substrate of the Cdh1 form of anaphase promoting complex, APC/Cdh1. We tested Cdh1 overexpression and the deletion of CLB2 (mitotic cyclin, substrate of APC/Cdh1) and found that both mutations had a rescuing effect on the expanded polyglutamine toxicity. Our data suggest that the toxic effect of aggregated proteins is partly indirect. We speculate that cellular attempt to degrade the aggregates overloads the proteasome, and this leads to pathological accumulation of APC substrates.



 


  Московский Государственный Университет имени М.В.Ломоносова



Почтовый адрес:
119991 г. Москва, ГСП-1, Ленинские горы МГУ 1, стр. 73,
Факультет биоинженерии и биоинформатики, комната 433.

Телефон / факс: +7 (495) 939-41-95
Справочная телефонов МГУ +7 (495) 939-10-00

E-mail: bioeng@genebee.msu.ru

© 2011 Факультет биоинженерии и биоинформатики
Московского Государственного Университета имени М.В.Ломоносова


 





- создание сайта, 2010