摘要
具有自我剪接能力的Ⅰ型和Ⅱ型内含子有编码蛋白质的功能。Ⅰ型内含子编码成熟酶和核酸内切酶，后者参与Ⅰ型内含子的归巢。Ⅱ型内含子编码的蛋白质呈现成熟酶核酸内切酶和逆转录酶活性，三种活性都在Ⅱ型内含子归巢中起作用。除归巢外，Ⅰ型和Ⅱ型内含子的转移还表现为转位和丢失。内含子作为可转移遗传因子，可能在进化中有一定的意义。
Both self splicing groop Ⅰ and groop Ⅱ introns can encode proteins. Groop Ⅰ introns encode proteins with maturase and endonuclease activities, whereas, groop Ⅱ intron encode proteins contain domains with activities of maturase, endonuclease and retrotranscriptase. As mobile genetic elements, the mobility of groop Ⅰ and groop Ⅱ introns include homing, transposition and lossing. Only the details of homing were described.
出处
《生物工程进展》
CSCD
1999年第2期29-31,55,共4页
Progress in Biotechnology
关键词
内含子转移
编码蛋白
核酸内切酶
逆转录酶
Intron, homing, intron encoded protein, endonuclease, retrotranscriptase
