Solution structure of Brak/CXCL14

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


Structural Determinants Involved in the Regulation of CXCL14/BRAK Expression by the 26 S Proteasome.

Peterson, F.C.Thorpe, J.A.Harder, A.G.Volkman, B.F.Schwarze, S.R.

(2006) J Mol Biol 363: 813-822

  • DOI: https://doi.org/10.1016/j.jmb.2006.08.057
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The chemokine CXCL14/BRAK participates in immune surveillance by recruiting dendritic cells. CXCL14 gene expression is altered in a number of cancers, but protein expression levels have not been investigated. Here we report that CXCL14 protein can be expressed in primary epithelial cells; however, in several immortalized and cancer cell lines this protein is targeted for polyubiquitylation and proteasomal degradation. We determined the NMR structure of CXCL14 to identify motifs controlling its expression. CXCL14 adopts the canonical chemokine tertiary fold but contains a unique five amino acid insertion (41VSRYR45) relative to other CXC chemokines. Deletion or substitution of key residues within this insertion prevented proteasomal degradation. Furthermore, we defined a 15 amino acid fragment of CXCL14 that is sufficient to induce proteasomal degradation. This study elucidates a post-translational mechanism for the loss of CXCL14 in cancer and a novel mode of chemokine regulation.

  • Organizational Affiliation

    Department of Biochemistry, Medical College of Wisconsin, Milwaukee, WI 53226, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Small inducible cytokine B1478Homo sapiensMutation(s): 0 
Gene Names: CXCL14NJACSCYB14
UniProt & NIH Common Fund Data Resources
Find proteins for O95715 (Homo sapiens)
Explore O95715 
Go to UniProtKB:  O95715
PHAROS:  O95715
GTEx:  ENSG00000145824 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO95715
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-10-24
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2020-02-26
    Changes: Data collection, Database references, Derived calculations, Other
  • Version 1.4: 2023-06-14
    Changes: Database references, Other