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Jian-Ping An Hong-Liang Li Zhi-Ying Liu Da-Ru Wang Chun-Xiang You Yuepeng Han 《植物学报(英文版)》2023,65(9):2175-2193
PHR1(PHOSPHATE STARVATION RESPONSE1)plays key roles in the inorganic phosphate(Pi)starvation response and in Pi deficiency-induced anthocyanin biosynthesis in plants. However, the post-translational regulation of PHR1 is unclear,and the molecular basis of PHR1-mediated anthocyanin biosynthesis remains elusive. In this study, we determined that MdPHR1 was essential for Pi deficiency-induced anthocyanin accumulation in apple(Malus × domestica). MdPHR1 interacted with MdWRKY75, a positive regulator... 相似文献
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The transcription factor E2F1 modulates apoptosis of neurons 总被引:9,自引:2,他引:9
Hou ST Callaghan D Fournier MC Hill I Kang L Massie B Morley P Murray C Rasquinha I Slack R MacManus JP 《Journal of neurochemistry》2000,75(1):91-100
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Seelan RS Parthasarathy LK Parthasarathy RN 《Archives of biochemistry and biophysics》2004,431(1):95-106
Human myo-inositol 1-phosphate synthase (IP synthase; E.C. 5.5.1.4), encoded by ISYNA1, catalyzes the de novo synthesis of inositol 1-phosphate from glucose 6-phosphate. It is a potential target for mood-stabilizing drugs such as lithium and valproate. But, very little is known about the regulation of human IP synthase. Here, we have characterized the minimal promoter of ISYNA1 and show that it is upregulated by E2F1. Upregulation occurs in a dose-dependent fashion and can be suppressed by ectopic expression of Rb. EMSA and antibody supershift analysis identified a functional E2F binding motif at -117. Complex formation at this site was competed by an excess of unlabeled Sp1 oligo consistent with the -117 E2F site overlapping an Sp1 motif. Because the -117 E2F motif is not a high-affinity binding site, we propose that the upregulation of ISYNA1 occurs through the cooperative interaction of several low-affinity E2F binding motifs present in the minimal promoter. 相似文献
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