SITE-SPECIFIC CLEAVAGE OF DOUBLE-STRAND DNA BY HYDROPEROXIDE OF LINOLEIC-ACID

SITE-SPECIFIC CLEAVAGE OF DOUBLE-STRAND DNA BY HYDROPEROXIDE OF LINOLEIC-ACID
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DOI:
10.1016/0014-5793(84)81131-x
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发表时间:
1984-01-01
期刊:
影响因子:
3.5
通讯作者:
INOUYE, S
INOUYE, S
中科院分区:
生物学3区
文献类型:
--
作者:
INOUYE, S

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通过超螺旋 pBR322 DNA 的琼脂糖凝胶电泳研究 13-L-过氧化氢-顺-9,反-11-十八碳二烯酸 (LAHPO) 对双链 (ds) DNA 的断裂,并使用 3' 端和 5' 端标记的 DNA 片段作为底物,通过 DNA 序列分析的方法确定 DNA 分子上的切割位点。 LAHPO 在 dsDNA 中的鸟嘌呤核苷酸位置引起切割。 LAHPO 在特定位点引起 dsDNA 断裂,但亚油酸 (LA) 和 13-L-羟基-顺-9,反式-11-十八碳二烯酸 (LAHO) 对 dsDNA 没有这种影响。 LAHPO 氢过氧基的活性氧原子可能负责 dsDNA 的位点特异性切割。
The breakage of double‐strand (ds) DNA by 13‐L‐hydroperoxy‐cis‐9,trans‐11‐octadecadienoic acid (LAHPO) was investigated by agarose gel electrophoresis of supercoiled pBR322 DNA and the site of cleavage on the DNA molecule was determined by the method of DNA sequence analysis using 3'‐end and 5'‐end‐labeled DNA fragments as substrates. LAHPO caused cleavage at the position of guanine nucleotide in dsDNA. LAHPO caused dsDNA breaks at specific sites, but linoleic acid (LA) and 13‐L‐hydoxy‐cis‐9,trans‐11‐octadecadienoic acid (LAHO) have no such effects on dsDNA. The active oxygen atom of the hydroperoxy group of LAHPO was perhaps responsible for the site‐specific cleavage of dsDNA.