4GLP

The crystal structure of soluble human CD14 reveals a bent solenoid with a hydrophobic amino-terminal pocket.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.002 Å
  • R-Value Free: 0.321 
  • R-Value Work: 0.283 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

The Crystal Structure of Human Soluble CD14 Reveals a Bent Solenoid with a Hydrophobic Amino-Terminal Pocket.

Kelley, S.L.Lukk, T.Nair, S.K.Tapping, R.I.

(2013) J.Immunol. 190: 1304-1311

  • DOI: 10.4049/jimmunol.1202446

  • PubMed Abstract: 
  • Human monocyte differentiation Ag CD14 is a pattern recognition receptor that enhances innate immune responses to infection by sensitizing host cells to bacterial LPS (endotoxin), lipoproteins, lipoteichoic acid, and other acylated microbial products ...

    Human monocyte differentiation Ag CD14 is a pattern recognition receptor that enhances innate immune responses to infection by sensitizing host cells to bacterial LPS (endotoxin), lipoproteins, lipoteichoic acid, and other acylated microbial products. CD14 physically delivers these lipidated microbial products to various TLR signaling complexes that subsequently induce intracellular proinflammatory signaling cascades upon ligand binding. The ensuing cellular responses are usually protective to the host but can also result in host fatality through sepsis. In this work, we have determined the x-ray crystal structure of human CD14. The structure reveals a bent solenoid typical of leucine-rich repeat proteins with an amino-terminal pocket that presumably binds acylated ligands including LPS. Comparison of human and mouse CD14 structures shows great similarity in overall protein fold. However, compared with mouse CD14, human CD14 contains an expanded pocket and alternative rim residues that are likely to be important for LPS binding and cell activation. The x-ray crystal structure of human CD14 presented in this article may foster additional ligand-bound structural studies, virtual docking studies, and drug design efforts to mitigate LPS-induced sepsis and other inflammatory diseases.


    Organizational Affiliation

    Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Monocyte differentiation antigen CD14
A
310Homo sapiensMutations: S281C
Gene Names: CD14
Find proteins for P08571 (Homo sapiens)
Go to Gene View: CD14
Go to UniProtKB:  P08571
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.002 Å
  • R-Value Free: 0.321 
  • R-Value Work: 0.283 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 147.520α = 90.00
b = 147.520β = 90.00
c = 44.070γ = 120.00
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling
PDB_EXTRACTdata extraction
HKL-2000data collection
PHASERphasing
Cootmodel building
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-12-26
    Type: Initial release
  • Version 1.1: 2013-01-16
    Type: Database references
  • Version 1.2: 2013-02-06
    Type: Database references
  • Version 1.3: 2017-11-15
    Type: Refinement description