6EHA

Heme oxygenase 1 in complex with inhibitor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.192 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Development and characterization of a new inhibitor of heme oxygenase activity for cancer treatment.

Mucha, O.Podkalicka, P.Mikulski, M.Barwacz, S.Andrysiak, K.Biela, A.Mieczkowski, M.Kachamakova-Trojanowska, N.Ryszawy, D.Bialas, A.Szelazek, B.Grudnik, P.Majewska, E.Michalik, K.Jakubiec, K.Bien, M.Witkowska, N.Gluza, K.Ekonomiuk, D.Sitarz, K.Galezowski, M.Brzozka, K.Dubin, G.Jozkowicz, A.Dulak, J.Loboda, A.

(2019) Arch Biochem Biophys 671: 130-142

  • DOI: 10.1016/j.abb.2019.07.002
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Heme oxygenase-1 (HO-1, HMOX1) degrades pro-oxidant heme into carbon monoxide (CO), ferrous ions (Fe 2+ ) and biliverdin. The enzyme exerts multiple cytoprotective functions associated with the promotion of angiogenesis and counteraction o ...

    Heme oxygenase-1 (HO-1, HMOX1) degrades pro-oxidant heme into carbon monoxide (CO), ferrous ions (Fe 2+ ) and biliverdin. The enzyme exerts multiple cytoprotective functions associated with the promotion of angiogenesis and counteraction of the detrimental effects of cellular stress which are crucial for the survival of both normal and tumor cells. Accordingly, in many tumor types, high expression of HO-1 correlates with poor prognosis and resistance to treatment, i.e. chemotherapy, suggesting inhibition of HO-1 as a possible antitumor approach. At the same time, the lack of selective and well-profiled inhibitors of HO-1 determines the unmet need for new modulators of this enzyme, with the potential to be used in either adjuvant therapy or as the stand-alone targeted therapeutics. In the current study, we provided novel inhibitors of HO-1 and validated the effect of pharmacological inhibition of HO activity by the imidazole-based inhibitor (SLV-11199) in human pancreatic (PANC-1) and prostate (DU-145) cancer cell lines. We demonstrated potent inhibition of HO activity in vitro and showed associated anticancer effectiveness of SLV-11199. Treatment with the tested compound led to decreased cancer cell viability and clonogenic potential. It has also sensitized the cancer cells to chemotherapy. In PANC-1 cells, diminished HO activity resulted in down-regulation of pro-angiogenic factors like IL-8. Mechanistic investigations revealed that the treatment with SLV-11199 decreased cell migration and inhibited MMP-1 and MMP-9 expression. Moreover, it affected mesenchymal phenotype by regulating key modulators of the epithelial to mesenchymal transition (EMT) signalling axis. Finally, F-actin cytoskeleton and focal contacts were destabilized by the reported compound. Overall, the current study suggests a possible relevance of the tested novel inhibitor of HO activity as a potential anticancer compound. To support such utility, further investigation is still needed, especially in in vivo conditions.


    Organizational Affiliation

    Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387, Kraków, Poland. Electronic address: agnieszka.loboda@uj.edu.pl.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Heme oxygenase 1
A, B
288Homo sapiensMutation(s): 0 
Gene Names: HMOX1HOHO1
EC: 1.14.14.18
Find proteins for P09601 (Homo sapiens)
Go to UniProtKB:  P09601
NIH Common Fund Data Resources
PHAROS  P09601
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download CCD File 
A, B
PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
B5B
Query on B5B

Download CCD File 
A, B
1-(3-imidazol-1-ylpropyl)-5-(2-methylpropyl)-4-phenyl-imidazole
C19 H24 N4
WJQVYWBLSJRHQE-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.192 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 61.411α = 90
b = 54.566β = 99.54
c = 72.54γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PHENIXrefinement
XDSdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-10-10
    Type: Initial release
  • Version 1.1: 2019-10-23
    Changes: Data collection, Database references, Structure summary