Boer P H, Gray M W
Department of Biochemistry, Dalhousie University, Halifax, Nova Scotia, Canada.
Curr Genet. 1991 Apr;19(4):309-12. doi: 10.1007/BF00355060.
In the mtDNA of Chlamydomonas reinhardtii, a unicellular green alga, we have identified a set of short repeated sequences up to 65 nucleotides long, each of which contains the palindromic consensus motif CTCGG(N4-14)CCGAG. Most of these repeated elements are localized in spacer regions that flank the transcribed coding regions of C. reinhardtii mtDNA. These algal mitochondrial repeats have features reminiscent of short repeats in some fungal mtDNAs, such as GC clusters in Saccharomyces cerevisiae and PstI palindromes in Neurospora crassa. The location of these elements suggests that they could play a role in gene expression, e.g., post-transcriptional processing, in C. reinhardtii mitochondria.
在单细胞绿藻莱茵衣藻的线粒体DNA（mtDNA）中，我们鉴定出了一组长度达65个核苷酸的短重复序列，每个序列都包含回文共有基序CTCGG(N4 - 14)CCGAG。这些重复元件大多位于莱茵衣藻mtDNA转录编码区两侧的间隔区。这些藻类线粒体重复序列具有一些特征，让人联想到某些真菌mtDNA中的短重复序列，比如酿酒酵母中的GC簇和粗糙脉孢菌中的PstI回文序列。这些元件的位置表明它们可能在莱茵衣藻线粒体的基因表达中发挥作用，例如转录后加工。
