期刊
JOURNAL OF MEDICINAL CHEMISTRY
卷 51, 期 9, 页码 2853-2857出版社
AMER CHEMICAL SOC
DOI: 10.1021/jm701558c
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Macbecin compares favorably to geldanamycin as an Hsp90 inhibitor, being more soluble, stable, more potently inhibiting ATPase activity (IC(50) = 2 mu M) and binding with higher affinity (K(d) = 0.24 mu M). Structural studies reveal significant differences in their Hsp90 binding characteristics, and macbecin-induced tumor cell growth inhibition is accompanied by characteristic degradation of Hsp90 client proteins. Macbecin significantly reduced tumor growth rates (minimum TIC: 32%) in a DU145 murine xenograft. Macbecin thus represents an attractive lead for further optimization.
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