Brunner B, Todt T, Lenzner S, Stout K, Schulz U, Ropers H H, Kalscheuer V M
Max-Planck-Institute for Molecular Genetics, D-14195 Berlin-Dahlem, Germany.
Genome Res. 1999 May;9(5):437-48.
The pufferfish Fugu rubripes has a compact 400-Mb genome that is approximately 7.5 times smaller than the human genome but contains a similar number of genes. Focusing on the distal short arm of the human X chromosome, we have studied the evolutionary conservation of gene orders in Fugu and man. Sequencing of 68 kb of Fugu genomic DNA identified nine genes in the following order: (SCML2)-STK9, XLRS1, PPEF-1, KELCH2, KELCH1, PHKA2, AP19, and U2AF1-RS2. Apart from an evolutionary inversion separating AP19 and U2AF1-RS2 from PHKA2, gene orders are identical in Fugu and man, and all nine human homologs map to the Xp22 band. All Fugu genes were found to be smaller than their human counterparts, but gene structures were mostly identical. These data suggest that genomic sequencing in Fugu is a powerful and economical strategy to predict gene orders in the human genome and to elucidate the structure of human genes.
河豚红鳍东方鲀拥有一个紧凑的400兆碱基对的基因组,其大小约为人类基因组的7.5倍,但所含基因数量相近。聚焦于人类X染色体的远端短臂,我们研究了河豚和人类基因顺序的进化保守性。对68千碱基对的河豚基因组DNA进行测序,确定了九个基因,顺序如下:(SCML2)-STK9、XLRS1、PPEF-1、KELCH2、KELCH1、PHKA2、AP19和U2AF1-RS2。除了将AP19和U2AF1-RS2与PHKA2分开的进化倒位外,河豚和人类的基因顺序相同,且所有九个人类同源基因都定位于Xp22带区。所有河豚基因都比其人类对应基因小,但基因结构大多相同。这些数据表明,河豚基因组测序是预测人类基因组中基因顺序以及阐明人类基因结构的一种强大且经济的策略。