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Volumn 20, Issue 5, 2010, Pages 1491-1495

The discovery and optimization of hexahydro-2H-pyrano[3,2-c]quinolines (HHPQs) as potent and selective inhibitors of the mitotic kinesin-5

Author keywords

Anti mitotic agents; Eg5 inhibitors; EMD 534085; Kinesin spindle protein; Kinesin 5; KSP; SAR

Indexed keywords

ADENOSINE TRIPHOSPHATASE INHIBITOR; ANTIMITOTIC AGENT; ANTINEOPLASTIC AGENT; EMD 534085; HEXAHYDRO 2H PYRANO[3,2 C]QUINOLINE DERIVATIVE; KINESIN; KINESIN 5; NUCLEOTIDE; QUINOLINE DERIVATIVE; UNCLASSIFIED DRUG;

EID: 76749108514     PISSN: 0960894X     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.bmcl.2010.01.110     Document Type: Article
Times cited : (61)

References (38)
  • 16
    • 76749119140 scopus 로고    scopus 로고
    • note
    • 50). DMSO was used as a solvent for compounds and kept constant in the assay at a concentration of 0.5%. A reaction without the Kinesin-5 ATPase served as a blank control. The ATPase reaction was monitored by measuring absorption at 340 nm over time (Mithras, LB 940 photometer). The reaction velocity was calculated by linear regression from the time kinetic record.
  • 31
    • 76749101354 scopus 로고    scopus 로고
    • note
    • Crystals of Kinesin-5 (amino acids 1-368) in complex with Monastrol were first obtained by vapor diffusion by mixing equal volumes of reservoir solution (17-18% w/v PEG3350, 0.23-0.26 M ammonium citrate pH 7.0) and protein solution (10 mg/ml Kinesin 5, 50 mM PIPES, 2 mM MgCl2, 1 mM EGTA, 1 mM ATP, 1 mM TCEP, 8 mM Monastrol, pH 6.8). Crystals of Kinesin-5 (amino acids 1-368) in complex with EMD 534085 were subsequently obtained by soaking crystals of Kinesin-5 in complex with Monastrol for 3 days in reservoir solution containing 20 mM EMD 534085. X-ray diffraction data were collected at 100 K at beamline X06SA of the Swiss Light Source (Paul-Scherrer-Institut, 5232 Villigen, Switzerland) to 2.0 Å resolution (R-sym = 0.061, completeness = 88,3%) in space group C2 with cell dimensions a = 161.0 Å, b = 79.7 Å, c = 65.5 Å, α = 90°, β = 96.9°, γ = 90°. The structure of Kinesin-5 in complex with EMD 534085 was determined by difference Fourier analysis and refined to an R-factor of 0.234 and R-free (5% of data) of 0.258. The refined model consists of two copies of Kinesin-5 (visible residues 16-271 and 288-362), ADP (as a result of ATP hydrolysis under the experimental conditions) and EMD 534085, related by a twofold non-crystallographic symmetry axis plus water molecules. The coordinates have been deposited with RCSB Protein Data Bank under the accession code 3L9H.
  • 35
    • 76749104928 scopus 로고    scopus 로고
    • note
    • 1H NMR (500 MHz, DMSO) δ = 7.47-7.34 (m, 4H), 7.34-7.27 (m, 1H), 6.88 (s, 1H), 6.83 (dd, J = 8.2, 1.9, 1H), 6.51 (d, J = 8.2, 1H), 5.86 (s, 1H), 4.56 (t, J = 5.8, 1H), 4.48 (d, J = 11.4, 1H), 4.31 (d, J = 2.2, 1H), 3.62-3.53 (m, 1H), 3.47-3.41 (m, 1H), 3.39-3.33 (m, 1H), 2.44 (q, J = 7.6, 2H), 1.88-1.78 (m, 1H), 1.64-1.55 (m, 1H), 1.53-1.37 (m, 1H), 1.34-1.23 (m, 2H), 1.12 (t, J = 7.6, 3H).
  • 36
    • 76749145745 scopus 로고    scopus 로고
    • Schiemann, K.; Emde, U.; Schlueter, T.; Saal, C.; Maiwald, M. PCT WO2007147480A2, 2007.
    • Schiemann, K.; Emde, U.; Schlueter, T.; Saal, C.; Maiwald, M. PCT WO2007147480A2, 2007.
  • 37
    • 76749160033 scopus 로고    scopus 로고
    • note
    • 2. On the next day, the medium was removed and 100 μL of fresh medium including serial dilutions of compounds were added to the culture plates and incubation was continued further for 48 h. The concentration of the compound solvent DMSO was kept constant at 0.5%. At the end of the compound incubation period the medium was removed and wells were washed briefly with 200 μL 1× PBS. 100 μL crystal violet staining solution (0.5% crystal violet in methanol) was added per well and incubated for 15 min at room temperature. The staining solution was removed and wells were washed thoroughly with deionized water. Plates were dried at room temperature o/n or at 37 °C for 1 h. The remaining dye in the wells was extracted with 200 μL methanol and absorption was determined at 540 or 550 nm.


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