2BWE

The crystal structure of the complex between the UBA and UBL domains of Dsk2

Summary for 2BWE

• Entry DOI: 10.2210/pdb2bwe/pdb
• Related: 1WR1 2BWB 2BWF
• Descriptor: DSK2 (3 entities in total)
• Functional Keywords: ubiquitin, ubiquitin-like proteins, protein/protein interaction, signaling protein
• Biological source: SACCHAROMYCES CEREVISIAE; More
• Total number of polymer chains: 21
• Total formula weight: 126688.56

Authors

Lowe, E.D.,Hasan, N.,Trempe, J.-F.,Fonso, L.,Noble, M.E.M.,Endicott, J.A.,Johnson, L.N.,Brown, N.R. (deposition date: 2005-07-13, release date: 2006-01-25, Last modification date: 2023-12-13)

Primary citation

Lowe, E.D.,Hasan, N.,Trempe, J.-F.,Fonso, L.,Noble, M.E.M.,Endicott, J.A.,Johnson, L.N.,Brown, N.R.
Structures of the Dsk2 Ubl and Uba Domains and Their Complex.
Acta Crystallogr.,Sect.D, 62:177-, 2006

PubMed Abstract: The yeast proteins Dsk2 and Rad23 belong to a family of proteins that contain an N-terminal ubiquitin-like domain (UBL) and a C-terminal ubiquitin-associated domain (UBA). Both Dsk2 and Rad23 function as adaptors to target ubiquitin-labelled proteins to the proteasome through recognition of polyubiquitin (four or more K48-linked ubiquitins) by their UBA domains and to the yeast proteasomal subunit Rpn1 by their UBL domains. The crystal structures of the Dsk2 UBL domain, the Dsk2 UBA domain and the Dsk2 UBA-UBL complex are reported. In the crystal, the Dsk2 UBA domains associate through electrostatic interactions to form ninefold helical ribbons that leave the ubiquitin-binding surface exposed. The UBA-UBL complex explains the reduced affinity of the UBA domain for UBL compared with ubiquitin and has implications for the regulation of Dsk2 adaptor function during ubiquitin-mediated proteasomal targeting. A model is discussed in which two or more Dsk2 UBA molecules may selectively bind to K48-linked polyubiquitin.

PubMed: 16421449
DOI: 10.1107/S0907444905037777

Experimental method

X-RAY DIFFRACTION (3.1 Å)