系统发育上不同藻类中保守的昼夜节律元件。
Conserved circadian elements in phylogenetically diverse algae.
作者信息
Mittag M
机构信息
Botanisches Institut, Ludwig-Maximilians-Universität München, Germany.
出版信息
Proc Natl Acad Sci U S A. 1996 Dec 10;93(25):14401-4. doi: 10.1073/pnas.93.25.14401.
Abstract
Circadian expression of the luciferin-binding protein (LBP) from the dinoflagellate Gonyaulax polyedra is regulated at the translational level. A small interval in the lbp 3'-untranslated region, which contains seven UG-repeats, serves as a cis-acting element to which a trans-acting factor (CCTR) binds in a circadian manner. Its binding activity correlates negatively with the circadian expression of LBP. Here I report the identification of a protein in the green alga Chlamydomonas reinhardtii that represents a CCTR analog. It binds both specifically and under control of the circadian clock to the UG-repeat region. The data show for the first time that circadian cis-elements implicated in translational regulation have been conserved during evolution.
摘要
来自多甲藻（Gonyaulax polyedra）的荧光素结合蛋白（LBP）的昼夜节律表达在翻译水平上受到调控。lbp 3'-非翻译区中的一个小间隔，包含七个UG重复序列，作为一个顺式作用元件，一个反式作用因子（CCTR）以昼夜节律的方式与其结合。其结合活性与LBP的昼夜节律表达呈负相关。在此，我报告了在莱茵衣藻（Chlamydomonas reinhardtii）中鉴定出一种代表CCTR类似物的蛋白质。它在昼夜节律时钟的控制下特异性地结合到UG重复区域。数据首次表明，参与翻译调控的昼夜节律顺式元件在进化过程中得到了保守。
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