4K9G

1.55 A Crystal Structure of Macrophage Migration Inhibitory Factor bound to ISO-66 and a related compound


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.199 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

ISO-66, a novel inhibitor of macrophage migration, shows efficacy in melanoma and colon cancer models.

Ioannou, K.Cheng, K.F.Crichlow, G.V.Birmpilis, A.I.Lolis, E.J.Tsitsilonis, O.E.Al-Abed, Y.

(2014) INT J ONCOL. 45: 1457-1468

  • DOI: 10.3892/ijo.2014.2551

  • PubMed Abstract: 
  • Macrophage migration inhibitory factor (MIF) is a pleiotropic pro-inflammatory cytokine, which possesses a contributing role in cancer progression and metastasis and, thus, is now considered a promising anticancer drug target. Many MIF-inactivating s ...

    Macrophage migration inhibitory factor (MIF) is a pleiotropic pro-inflammatory cytokine, which possesses a contributing role in cancer progression and metastasis and, thus, is now considered a promising anticancer drug target. Many MIF-inactivating strategies have proven successful in delaying cancer growth. Here, we report on the synthesis of ISO-66, a novel, highly stable, small-molecule MIF inhibitor, an analog of ISO-1 with improved characteristics. The MIF:ISO-66 co-crystal structure demonstrated that ISO-66 ligates the tautomerase active site of MIF, which has previously been shown to play an important role in its biological functions. In vitro, ISO-66 enhanced specific and non-specific anticancer immune responses, whereas prolonged administration of ISO-66 in mice with established syngeneic melanoma or colon cancer was non-toxic and resulted in a significant decrease in tumor burden. Subsequent ex vivo analysis of mouse splenocytes revealed that the observed decrease in tumor growth rates was likely mediated by the selective in vivo expansion of antitumor-reactive effector cells induced by ISO-66. Compared to other MIF-inactivating strategies employed in vivo, the anticancer activity of ISO-66 is demonstrated to be of equal or better efficacy. Our findings suggest that targeting MIF, via highly specific and stable compounds, such as ISO-66, may be effective for cancer treatment and stimulation of anticancer immune responses.


    Organizational Affiliation

    Department of Animal and Human Physiology, Faculty of Biology, University of Athens, Athens 15784, Greece.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Macrophage migration inhibitory factor
A, B, C
114Homo sapiensMutation(s): 0 
Gene Names: MIF (GLIF, MMIF)
EC: 5.3.2.1
Find proteins for P14174 (Homo sapiens)
Go to Gene View: MIF
Go to UniProtKB:  P14174
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CL
Query on CL

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Download CCD File 
A, B, C
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
1Q2
Query on 1Q2

Download SDF File 
Download CCD File 
A, B, C
(4R,6Z)-6-(3-fluoro-4-hydroxyphenyl)-4-hydroxy-6-iminohexan-2-one
C12 H14 F N O3
DBWKEXPZAPNKOY-ZQQXWWNKSA-N
 Ligand Interaction
1Q1
Query on 1Q1

Download SDF File 
Download CCD File 
A
1-[(5S)-3-(3-fluoro-4-hydroxyphenyl)-4,5-dihydro-1,2-oxazol-5-yl]propan-2-one
C12 H12 F N O3
LDIXQWIEGSUIMD-SECBINFHSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.199 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 95.458α = 90.00
b = 95.458β = 90.00
c = 104.552γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
CBASSdata collection
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-09-24
    Type: Initial release