Alternative splicing generates a novel FADS2 alternative transcript in baboons.

Alternative splicing generates a novel FADS2 alternative transcript in baboons.
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DOI:
10.1007/s11033-009-9750-9
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发表时间:
2010-06
影响因子:
2.8
通讯作者:
Brenna JT
Brenna JT
中科院分区:
生物学4区
文献类型:
--
作者:
Park WJ;Reardon HT;Tyburczy C;Kothapalli KS;Brenna JT

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哺乳动物脂肪酸去饱和酶2 (FADS2)基因编码的催化活性被认为是长链多不饱和脂肪酸(LCPUFA)合成的限速步骤。FADS2催化至少5种底物的6-去饱和和至少2种底物的8-去饱和。然而,调控fads2介导的去饱和的分子机制仍然不明确。我们在此报告了灵长类动物FADS2的替代转录本(AT1)的特征,并将其与经典转录本在12周龄新生狒狒的12个组织和人类SK-N-SH神经母细胞瘤(NB)细胞中的表达进行了比较。RT-PCR分析显示,在所有组织中,经典转录本的丰度均高于AT1。然而,AT1的表达是高度可变的,在肝脏、视网膜、枕叶、海马、脾脏和卵巢中的表达比在其他组织中的表达更多,而经典转录本几乎没有变异性。这些数据表明FADS2 AT1是调控LCPUFA合成的候选基因。
The mammalian fatty acid desaturase 2 (FADS2) gene codes for catalytic activity considered to be the rate limited step in long chain polyunsaturated fatty acid (LCPUFA) synthesis. FADS2 catalyzes 6-desaturation in at least five substrates and 8-desaturation in at least two substrates. However, the molecular mechanisms that regulate FADS2-mediated desaturation remain ill-defined. We report here characterization of an alternative transcript (AT1) of primate FADS2 and compare its expression to that of the classical transcript in 12 tissues of a 12 week old neonate baboon, and in human SK-N-SH neuroblastoma (NB) cells. RT-PCR analysis indicates relatively greater abundance of classical transcript than AT1 in all tissues. However, AT1 expression is highly variable, showing greater expression in liver, retina, occipital lobe, hippocampus, spleen, and ovary, than in other tissues, whereas classical transcript displayed little variability. These data suggest that FADS2 AT1 is a candidate for regulation of LCPUFA synthesis.
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