Metal-Chelating Inhibitors of a Zinc Finger Protein HIV-EP1. Remarkable Potentiation of Inhibitory Activity by Introduction of SH Groups
作者:Mikako Fujita、Masami Otsuka、Yukio Sugiura
DOI:10.1021/jm950831t
日期:1996.1.1
HIV-EP1 is a C2H2 type zinc finger proteinwhich binds to DNA kappa B site present in the long terminal repeat of HIV provirus. Previously we have reported zincchelators having histidine--pyridine--histidine skeleton and were successful in inhibiting the DNA binding of HIV-EP1 by removing zinc from the zinc finger domain. Aiming at the potentiation of the inhibitory activity of our previous zinc chelators
the properties of their coppercomplexes were studied. Potentiometric titration, absorption and ESR spectral measurement, and X-ray crystallography of coppercomplexes of 4 and 7 were carried out. X-ray structure of [Cu4]2+ and [Cu7]2+ revealed an intermediategeometrybetween the regular trigonalbipyramid with two secondary amines being axial and the regular squarepyramid with one of the thioethers