1ESR

CRYSTAL STRUCTURE OF HUMAN MONOCYTE CHEMOTACTIC PROTEIN-2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.320 
  • R-Value Work: 0.232 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Complete crystal structure of monocyte chemotactic protein-2, a CC chemokine that interacts with multiple receptors.

Blaszczyk, J.Coillie, E.V.Proost, P.Damme, J.V.Opdenakker, G.Bujacz, G.D.Wang, J.M.Ji, X.

(2000) Biochemistry 39: 14075-14081


  • PubMed Abstract: 
  • Monocyte chemotactic protein 2 (MCP-2) is a CC chemokine that utilizes multiple cellular receptors to attract and activate human leukocytes. MCP-2 is a potent inhibitor of HIV-1 by virtue of its high-affinity binding to the receptor CCR5, one of the ...

    Monocyte chemotactic protein 2 (MCP-2) is a CC chemokine that utilizes multiple cellular receptors to attract and activate human leukocytes. MCP-2 is a potent inhibitor of HIV-1 by virtue of its high-affinity binding to the receptor CCR5, one of the major coreceptors for HIV-1. Although a few structures of CC chemokines have been reported, none of these was determined with the N-terminal pyroglutamic acid residue (pGlu1) and a complete C-terminus. pGlu1 is essential for the chemotactic activity of MCP-2. Recombinant MCP-2 has Gln1 at the N terminus, 12-15% of which cyclizes automatically and forms pGlu1. The chemotactic activity of such MCP-2 mixture, which contains 12-15% pGlu1-form and 85-88% Gln1-form protein, is approximately 10 times lower when compared with that of fully cyclized MCP-2 preparation. Therefore, this chemokine is practically inactive without pGlu1. We have determined the complete crystal structure of MCP-2 that contains both pGlu1 and an intact C-terminus. With the existence of pGlu1, the conformation of the N-terminus allows two additional interactions between the two subunits of MCP-2 dimer: a hydrogen bond between pGlu1 and Asn17 and a salt bridge between Asp3 and Arg18. Consequently, both pGlu1 are anchored and buried, and thereby, both N-terminal regions are protected against protease degradation. We have also observed not previously reported extended helical nature of the C terminal region, which covers residues 58-74.


    Organizational Affiliation

    Program in Structural Biology and Laboratory of Molecular Immunoregulation, National Cancer Institute, Frederick, Maryland 21702, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MONOCYTE CHEMOTACTIC PROTEIN 2
A
76Homo sapiensGene Names: CCL8 (MCP2, SCYA10, SCYA8)
Find proteins for P80075 (Homo sapiens)
Go to Gene View: CCL8
Go to UniProtKB:  P80075
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PCA
Query on PCA
A
L-PEPTIDE LINKINGC5 H7 N O3GLU
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.320 
  • R-Value Work: 0.232 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 61.012α = 90.00
b = 61.012β = 90.00
c = 114.926γ = 120.00
Software Package:
Software NamePurpose
SHELXL-97refinement
SCALEPACKdata scaling
DENZOdata reduction
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2000-04-10 
  • Released Date: 2000-12-06 
  • Deposition Author(s): Blaszczyk, J., Ji, X.

Revision History 

  • Version 1.0: 2000-12-06
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance