5UJN

Representative 2-conformer ensembles of K27-linked Ub2 from RDC data


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100000 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the best agreement with RDC data 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Linkage via K27 Bestows Ubiquitin Chains with Unique Properties among Polyubiquitins.

Castaneda, C.A.Dixon, E.K.Walker, O.Chaturvedi, A.Nakasone, M.A.Curtis, J.E.Reed, M.R.Krueger, S.Cropp, T.A.Fushman, D.

(2016) Structure 24: 423-436

  • DOI: 10.1016/j.str.2016.01.007
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Polyubiquitination, a critical protein post-translational modification, signals for a diverse set of cellular events via the different isopeptide linkages formed between the C terminus of one ubiquitin (Ub) and the ɛ-amine of K6, K11, K27, K29, K33, ...

    Polyubiquitination, a critical protein post-translational modification, signals for a diverse set of cellular events via the different isopeptide linkages formed between the C terminus of one ubiquitin (Ub) and the ɛ-amine of K6, K11, K27, K29, K33, K48, or K63 of a second Ub. We assembled di-ubiquitins (Ub2) comprising every lysine linkage and examined them biochemically and structurally. Of these, K27-Ub2 is unique as it is not cleaved by most deubiquitinases. As this remains the only structurally uncharacterized lysine linkage, we comprehensively examined the structures and dynamics of K27-Ub2 using nuclear magnetic resonance, small-angle neutron scattering, and in silico ensemble modeling. Our structural data provide insights into the functional properties of K27-Ub2, in particular that K27-Ub2 may be specifically recognized by K48-selective receptor UBA2 domain from proteasomal shuttle protein hHR23a. Binding studies and mutagenesis confirmed this prediction, further highlighting structural/recognition versatility of polyubiquitins and the potential power of determining function from elucidation of conformational ensembles.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, Center for Biomolecular Structure and Organization, University of Maryland, College Park, MD 20742, USA.,Department of Chemistry and Biochemistry, Center for Biomolecular Structure and Organization, University of Maryland, College Park, MD 20742, USA. Electronic address: fushman@umd.edu.,Department of Chemistry and Biochemistry, Center for Biomolecular Structure and Organization, University of Maryland, College Park, MD 20742, USA; Departments of Biology & Chemistry, Syracuse University, Syracuse, NY 13244, USA. Electronic address: cacastan@syr.edu.,NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD 20899-8562, USA.,Department of Chemistry, Virginia Commonwealth University, Richmond, VA 23284, USA.,Institut des Sciences Analytiques, UMR5280-Université de Lyon, 69100 Villeurbanne, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ubiquitin
A, B
76Homo sapiensMutation(s): 0 
Gene Names: UBB
Find proteins for P0CG47 (Homo sapiens)
Go to Gene View: UBB
Go to UniProtKB:  P0CG47
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100000 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the best agreement with RDC data 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical SciencesUnited StatesGM065334

Revision History 

  • Version 1.0: 2018-08-08
    Type: Initial release