Forgot your Password

If you have forgotten your password, please enter your account email below and we will reset your password and email you the new password.


Login to SciCrunch


Register an Account

Delete Saved Search

Are you sure you want to delete this saved search?


NIF LinkOut Portal


The Cdc48 ATPase modulates the interaction between two proteolytic factors Ufd2 and Rad23.

Baek GH, Kim I, Rao H
Proceedings of the National Academy of Sciences of the United States of America


Rad23 and cell division cycle protein 48 (Cdc48), two key regulators of postubiquitylation events, act on distinct and overlapping sets of substrates. The principle underlying their division of labor and cooperation in proteolysis remains elusive. Both Rad23 and Cdc48 bind a ubiquitin protein ligase ubiquitin fusion degradation-2 (Ufd2), and regulate the degradation of Ufd2 substrates. With its ability to bind ubiquitin chains directly and the proteasome via different domains, Rad23 serves as a bridge linking ubiquitylated substrates to the proteasome. The significance and specific role of the Ufd2-Cdc48 interaction are unclear. Here, we demonstrate that mutations in Ufd2 alter its interaction with Cdc48 and impair its function in substrate proteolysis but not in ubiquitylation. Furthermore, Cdc48 promotes the disassembly of the Ufd2-Rad23 complex in an manner that is dependent on ATP and Ufd2 binding, revealing a biochemical role for Cdc48. Rad23 was shown to bind separately to Ufd2 and to the proteasome subunit Rpn1, which define two distinct steps in proteolysis. The action of Cdc48 could free Rad23 from Ufd2 to allow its subsequent association with Rpn1, which in turn may facilitate the orderly transfer of the substrate from the ubiquitylation apparatus to the proteasome.

  1. Welcome

    Welcome to NIF. Explore available research resources: data, tools and materials, from across the web

  2. Community Resources

    Search for resources specially selected for NIF community

  3. More Resources

    Search across hundreds of additional biomedical databases

  4. Literature

    Search Pub Med abstracts and full text from PubMed Central

  5. Insert your Query

    Enter your search terms here and hit return. Search results for the selected tab will be returned.

  6. Join the Community

    Click here to login or register and join this community.

  7. Categories

    Narrow your search by selecting a category. For additional help in searching, view our tutorials.

  8. Query Info

    Displays the total number of search results. Provides additional information on search terms, e.g., automated query expansions, and any included categories or facets. Expansions, filters and facets can be removed by clicking on the X. Clicking on the + restores them.

  9. Search Results

    Displays individual records and a brief description. Click on the icons below each record to explore additional display options.