Cordesse F, Cooke R, Tremousaygue D, Grellet F, Delseny M
Laboratoire de Physiologie et Biologie Moléculaire Végétales, URA 565 du Centre National de la Recherche Scientifique, Université de Perpignan, France.
J Mol Evol. 1993 Apr;36(4):369-79. doi: 10.1007/BF00182184.
The intergenic spacer of a rice ribosomal RNA gene repeating unit has been completely sequenced. The spacer contains three imperfect, direct repeated regions of 264-253 bp, followed by a related but more highly divergent region. Detailed analysis of the sequence allows the presentation of an evolutionary scenario in which the 264-253-bp repeats are derived from an ancestral 150-bp sequence by deletion and amplification. Comparison of the rice sequence with those of maize, wheat, and rye shows that, despite considerable divergence from the ancestral sequence, several regions have been highly conserved, suggesting that they may play an important role in the structure and/or expression of the ribosomal genes.
水稻核糖体RNA基因重复单位的基因间隔区已被完全测序。该间隔区包含三个264 - 253 bp的不完全直接重复区域，随后是一个相关但差异更大的区域。对该序列的详细分析揭示了一种进化情形，即264 - 253 bp的重复序列是通过缺失和扩增从一个150 bp的祖先序列衍生而来。将水稻序列与玉米、小麦和黑麦的序列进行比较表明，尽管与祖先序列有很大差异，但仍有几个区域高度保守，这表明它们可能在核糖体基因的结构和/或表达中发挥重要作用。
