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Nucleic Acids Research, 1980, Vol. 8, No. 17 3917-3932
© 1980

CHEMISTRY

The electrostatic potential and steric accessibility of reactive sites within Z-DNA

Krystyna Zakrezewska, Richard Lavery, Alberte Pullman and Bernard Pullman

Institut de Biologie Physico-Chimique, Laboratoire de Chimie Théorique, associé au C.N.R.S. 13, rue Pierre et Marie Curie, 75005 Paris, France

Received July 8, 1980. A theoretical study of indices potentially useful for investigation of the reactivity of the recently discovered Z-DNA double helix is presented. The electrostatic potential minima and the steric accessibility of reactive sites are calculated. The effect of screening the phosphate groups by metal cations is investigated. The results are compared with those for the B-DNA double helix.


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