1U9K

Crystal Structure of Mouse Triggering Receptor Expressed on Myeloid Cells 1 (TREM-1) at 1.76

• PDB DOI: https://doi.org/10.2210/pdb1U9K/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Mus musculus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2004-08-09 Released: 2004-12-14 
• Deposition Author(s): Kelker, M.S., Debler, E.W., Wilson, I.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.76 Å
• R-Value Free: 0.248 
• R-Value Work: 0.225 
• R-Value Observed: 0.226 

Starting Model: experimental

Literature

Crystal Structure of Mouse Triggering Receptor Expressed on Myeloid Cells 1 (TREM-1) at 1.76A

Kelker, M.S., Debler, E.W., Wilson, I.A.

(2004) J Mol Biol 344: 1175-1181

• PubMed: 15561137 
• DOI: https://doi.org/10.1016/j.jmb.2004.10.009
• Primary Citation of Related Structures:  
  1U9K


• PubMed Abstract: 
  

  Triggering receptor expressed on myeloid cells (TREM) 1 is an activating receptor expressed on myeloid cells whose ligand(s) remain elusive. TREM-1 stimulation activates neutrophils and monocytes and induces the secretion of pro-inflammatory molecules, which amplifies the Toll-like receptor-initiated responses to invading pathogens. In addition, TREM-1 mediates the septic shock pathway, and thus represents a potential therapeutic target. We report the crystal structure of the mouse TREM-1 extracellular domain at 1.76A resolution. The mouse extracellular domain is monomeric, consistent with our previous human TREM-1 structure, and strongly supports the contention that the globular TREM-1 head is a monomer contrary to proposals of a symmetric dimer.

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Organizational Affiliation: 

Department of Molecular Biology and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 26.41 kDa 
• Atom Count: 1,846 
• Modelled Residue Count: 220 
• Deposited Residue Count: 228 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
triggering receptor expressed on myeloid cells 1	A, B	114	Mus musculus	Mutation(s): 0  Gene Names: trem
UniProt & NIH Common Fund Data Resources
Find proteins for Q9JKE2 (Mus musculus) Explore Q9JKE2  Go to UniProtKB:  Q9JKE2
IMPC:  MGI:1930005

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	C [auth A], D [auth A], E [auth B]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.76 Å
• R-Value Free: 0.248 
• R-Value Work: 0.225 
• R-Value Observed: 0.226 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 47.837	α = 90
b = 49.081	β = 90
c = 125.208	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2004-12-14 
Deposition Author(s): Kelker, M.S., Debler, E.W., Wilson, I.A.

Revision History  

• Version 1.0: 2004-12-14
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Advisory, Version format compliance
• Version 1.3: 2023-08-23
  Changes: Data collection, Database references, Derived calculations, Refinement description