TY - JOUR A1 - Kiyosawa, Hidenori A1 - Mise, Nathan A1 - Iwase, Shigeru A1 - Hayashizaki, Yoshihide A1 - Abe, Kuniya T1 - Disclosing hidden transcripts: Mouse natural sense–antisense transcripts tend to be poly(A) negative and nuclear localized Y1 - 2005/04/01 JF - Genome Research JO - Genome Research SP - 463 EP - 474 DO - 10.1101/gr.3155905 VL - 15 IS - 4 UR - http://genome.cshlp.org/content/15/4/463.abstract N2 - Genome-wide in silico analysis identified thousands of natural sense–antisense transcript (SAT) pairs in the mouse transcriptome. We investigated their expression using strand-specific oligo-microarray that distinguishes expression of sense and antisense RNA from 1947 SAT pairs. The majority of the predicted SATs are expressed at various steady-state levels in various tissues, and cluster analysis of the array data demonstrated that the ratio of sense and antisense expression for some of the SATs fluctuated markedly among these tissues, while the rest was unchanged. Surprisingly, further analyses indicated that vast amounts of multiple-sized transcripts are expressed from the SAT loci, which tended to be poly(A) negative, and nuclear localized. The tendency that the SATs are often not polyadenylated is conserved, even in the randomly chosen SAT genes in the plant Arabidopsis thaliana. Such common characteristics imply general roles of the SATs in regulation of gene expression. ER -