Human CCR2 Membrane-Proximal C-Terminal Region (PRO-C) in a frount bound form

Experimental Data Snapshot

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

wwPDB Validation   3D Report Full Report

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Structural basis for the binding of the membrane-proximal C-terminal region of chemokine receptor CCR2 with the cytosolic regulator FROUNT.

Esaki, K.Yoshinaga, S.Tsuji, T.Toda, E.Terashima, Y.Saitoh, T.Kohda, D.Kohno, T.Osawa, M.Ueda, T.Shimada, I.Matsushima, K.Terasawa, H.

(2014) FEBS J 281: 5552-5566

  • DOI: https://doi.org/10.1111/febs.13096
  • Primary Citation of Related Structures:  
    2MLO, 2MLQ

  • PubMed Abstract: 

    The membrane-proximal C-terminal region (Pro-C) is important for the regulation of G-protein-coupled receptors (GPCRs), but the binding of the Pro-C region to a cytosolic regulator has not been structurally analyzed. The chemokine receptor CCR2 is a member of the GPCR superfamily, and the Pro-C region of CCR2 binds to the cytosolic regulator FROUNT. Studying the interaction between CCR2 Pro-C and FROUNT at an atomic level provides a basis for understanding the signal transduction mechanism via GPCRs. NOE-based NMR experiments showed that, when bound to FROUNT, CCR2 Pro-C adopted a helical conformation, as well as when embedded in dodecylphosphocholine micelles. A comparison of two types of cross-saturation-based NMR experiments, applied to a three-component mixture of Pro-C, FROUNT and micelles or a two-component mixture of Pro-C and micelles, revealed that the hydrophobic binding surface on Pro-C for FROUNT mostly overlapped with the binding site for micelles, suggesting competitive binding of Pro-C between FROUNT and micelles. Leu316 was important for both FROUNT and micelle binding. Phe319 was newly identified to be crucial for FROUNT binding, by NMR and mutational analyses. The association and dissociation rates of CCR2 Pro-C for lipid bilayer biomembranes were faster than those for FROUNT. We previously reported that FROUNT binding to CCR2 is detectable even in unstimulated cells and increases in response to chemokine stimulation. Taken together, these results support a model of CCR2 equilibrium: chemokine binding changes the conformational equilibrium of CCR2 toward the active state, and Pro-C switches its binding partner from the membrane to FROUNT.

  • Organizational Affiliation

    Department of Structural BioImaging, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan.


Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
MCP-1 receptor16Homo sapiensMutation(s): 0 
Gene Names: CCR2
UniProt & NIH Common Fund Data Resources
Find proteins for P41597 (Homo sapiens)
Explore P41597 
Go to UniProtKB:  P41597
PHAROS:  P41597
GTEx:  ENSG00000121807 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP41597
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: 2014-10-08
    Type: Initial release
  • Version 1.1: 2014-10-29
    Changes: Database references
  • Version 1.2: 2022-08-24
    Changes: Database references
  • Version 1.3: 2023-06-14
    Changes: Other
  • Version 1.4: 2024-05-15
    Changes: Data collection, Database references