2MBO

K11-linked Diubiquitin average solution structure at pH 6.8, 0 mM NaCl


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 
  • Conformers Submitted: 
  • Selection Criteria: target function 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Unique structural, dynamical, and functional properties of k11-linked polyubiquitin chains.

Castaneda, C.A.Kashyap, T.R.Nakasone, M.A.Krueger, S.Fushman, D.

(2013) Structure 21: 1168-1181

  • DOI: 10.1016/j.str.2013.04.029
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • K11-linked polyubiquitin chains play important signaling and regulatory roles in both degradative and nonproteolytic pathways in eukaryotes. To understand the structural basis of how these chains are recognized and distinguished from other polyubiqui ...

    K11-linked polyubiquitin chains play important signaling and regulatory roles in both degradative and nonproteolytic pathways in eukaryotes. To understand the structural basis of how these chains are recognized and distinguished from other polyubiquitins, we determined solution structures of K11-linked diubiquitin (K11-Ub2) in the absence and presence of salt. These structures reveal that K11-Ub2 adopts conformations distinct from those of K48-linked or K63-linked chains. Importantly, our solution NMR and SANS data are inconsistent with published crystal structures of K11-Ub2. We found that increasing salt concentration compacts K11-Ub2 and strengthens interactions between the two Ub units. Binding studies indicate that K11-Ub2 interacts with ubiquitin-receptor proteins from both proteasomal and nonproteasomal pathways but with intermediate affinity and different binding modes than either K48-linked or K63-linked diubiquitin. Our data support the hypothesis that polyubiquitin chains of different linkages possess unique conformational and dynamical properties, allowing them to be recognized differently by downstream receptor proteins.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, Center for Biomolecular Structure and Organization, University of Maryland, College Park, MD 20742, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ubiquitin
A, B
76Homo sapiensMutation(s): 0 
Gene Names: UBC
Find proteins for P0CG48 (Homo sapiens)
Go to Gene View: UBC
Go to UniProtKB:  P0CG48
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 
  • Conformers Submitted: 
  • Selection Criteria: target function 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-09-04
    Type: Initial release