当前位置： SCI文献检索 > BIOCHEMICAL PHARMACOLOGY期刊下所有文献 > Interaction of the DNA topoisomerase II catalytic inhibitor meso-2,3-bis(3,5-dioxopiperazine-1-yl)butane (ICRF-193), a bisdioxopiperazine derivative, with the conserved region(s) of eukaryotic but not prokaryotic enzyme.

Interaction of the DNA topoisomerase II catalytic inhibitor meso-2,3-bis(3,5-dioxopiperazine-1-yl)butane (ICRF-193), a bisdioxopiperazine derivative, with the conserved region(s) of eukaryotic but not prokaryotic enzyme.

Abstract：

:ICRF-193 [meso-2,3-bis(3,5-dioxopiperazine-1-yl)butane], a bisdioxopiperazine compound, has been shown to be a catalytic inhibitor of DNA topoisomerase II by stabilizing the enzyme in the form of a closed "protein clamp," an intermediate form in the catalytic cycle (Roca et al., Proc Natl Acad Sci USA 91: 1781-1785, 1994). In view of its usefulness as a probe in the functional analysis of the enzyme, we tried further to define the domain(s) of the enzyme interacting with the drug by examining its inhibitory activity on type II topoisomerases from various species of eukaryotes and prokaryotes. ICRF-193 inhibited the enzyme from yeast, fly, frog, plant, and mammals at IC50 values in the range of 1-13 microM. Experiments using fission yeast truncated mutant type II enzyme lacking both amino-terminal 74 amino acids and carboxy-terminal 265 amino acids revealed that ICRF-193 interacts with the 125 kDa "core" polypeptide of the enzyme. In contrast, prokaryotic type II enzymes, Escherichia coli DNA gyrase, topo IV, and phage T4 topo, were not affected by the drug. From these results, the domain(s) common to eukaryotic but not to prokaryotic type II enzymes interacting with ICRF-193 was speculated.

journal_name

Biochem Pharmacol

journal_title

Biochemical pharmacology

authors

Sato M,Ishida R,Narita T,Kato J,Ikeda H,Fukazawa H,Andoh T

doi

10.1016/s0006-2952(97)00201-3

subject

Has Abstract

pub_date

1997-09-01 00:00:00

pages

545-50

issue

5

eissn

0006-2952

issn

1873-2968

pii

S0006295297002013

journal_volume

54

pub_type

杂志文章

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