内含子编码蛋白与内含子的转移

Intron Encoded Protein and Intron Mobility

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.