JCB logo
Sign up for e-mail content alerts
  Home | Help | Feedback | Subscriptions | Archive | Search | Table of Contents
Published online 5 November 2001. doi:10.1083/jcb.200104035
This Article
Right arrow Full Text
Right arrow Full Text (PDF, 739K)
Right arrow PPT slides of all figures
Right arrow Alert me when this article is cited
Right arrow Citation Map
Services
Right arrow Email this article
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new content in the JCB
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Tateishi, K.
Right arrow Articles by Chiba, T.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Tateishi, K.
Right arrow Articles by Chiba, T.
Social Bookmarking
Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Reddit   Add to Technorati  
What's this?
© The Rockefeller University Press, 0021-9525/2001/11/571 $5.00
The Journal of Cell Biology, Volume 155, Number 4, November 12, 2001 571-580

Article

 The NEDD8 system is essential for cell cycle progression and morphogenetic pathway in mice

Keisuke Tateishi1,2, Masao Omata2, Keiji Tanaka1 and Tomoki Chiba1

1 Department of Molecular Oncology, Tokyo Metropolitan Institute of Medical Science, and CREST, Japan Science and Technology Corporation, Bunkyo-Ku, Tokyo 113-8613, Japan
2 Department of Gastroenterology, Faculty of Medicine, University of Tokyo, Bunkyo-Ku, Tokyo 113-8655, Japan

Address correspondence to Tomoki Chiba, Dept. of Molecular Oncology, Tokyo Metropolitan Institute of Medical Science, 3-18-22 Honkomagome, Bunkyo-Ku, Tokyo 113-8613, Japan. Tel. and fax: 81-3-3823-2237. E-mail: tchiba{at}rinshoken.or.jp

NEDD8/Rub1 is a ubiquitin (Ub)-like molecule that covalently ligates to target proteins through an enzymatic cascade analogous to ubiquitylation. This modifier is known to target all cullin (Cul) family proteins. The latter are essential components of Skp1/Cul-1/F-box protein (SCF)–like Ub ligase complexes, which play critical roles in Ub-mediated proteolysis. To determine the role of the NEDD8 system in mammals, we generated mice deficient in Uba3 gene that encodes a catalytic subunit of NEDD8-activating enzyme. Uba3-/- mice died in utero at the periimplantation stage. Mutant embryos showed selective apoptosis of the inner cell mass but not of trophoblastic cells. However, the mutant trophoblastic cells could not enter the S phase of the endoreduplication cycle. This cell cycle arrest was accompanied with aberrant expression of cyclin E and p57Kip2. These results suggested that the NEDD8 system is essential for both mitotic and the endoreduplicative cell cycle progression. ß-Catenin, a mediator of the Wnt/wingless signaling pathway, which degrades continuously in the cytoplasm through SCF Ub ligase, was also accumulated in the Uba3-/- cytoplasm and nucleus. Thus, the NEDD8 system is essential for the regulation of protein degradation pathways involved in cell cycle progression and morphogenesis, possibly through the function of the Cul family proteins.

Key Words: NEDD8; ubiquitin; cullin; knock-out; cell cycle


Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Reddit Reddit   Add to Technorati Technorati    What's this?


This article has been cited by other articles:



  Home | Help | Feedback | Subscriptions | Archive | Search | Table of Contents