کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9131916 1160967 2005 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Asymmetric expression of transcripts derived from the shared promoter between the divergently oriented ACACA and TADA2L genes
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی ژنتیک
پیش نمایش صفحه اول مقاله
Asymmetric expression of transcripts derived from the shared promoter between the divergently oriented ACACA and TADA2L genes
چکیده انگلیسی
The mammalian gene (ACACA) encoding acetyl-CoA carboxylase-α, a key regulatory enzyme of fatty acid synthesis, is transcribed from multiple promoters. We have delineated the 5′ boundary of ACACA in four species (human, mouse, rat, and ovine). The 5′ end of ACACA is located within a 600- to 700-bp CpG island encompassing a bidirectional promoter shared with the divergently oriented TADA2L, which encodes a component of chromatin-modifying complexes. In mouse and rat, this promoter, now referred to as Acaca PI, is located 43 kb upstream of the previously known regulatory regions. The shared promoter coregulates transcripts for TADA2L and ACACA in an asymmetric fashion in human and mouse tissues. A higher concentration of RNA polymerase II (Pol II) within the intergenic region in brain compared to liver of mouse reflects the greater abundance of the two transcripts in brain. The concentration of Pol II tracking downstream, which is lower than at the promoter, is not significantly different in either gene in the two tissues and does not reflect the 10- and >200-fold greater abundance of Tada2l and Acaca PI transcripts, respectively, in brain. Thus, regulation of clearance of Pol II from the promoter and the rate of elongation may therefore be determinants of the asymmetric expression of these transcripts.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Genomics - Volume 85, Issue 1, January 2005, Pages 71-84
نویسندگان
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