RUI: Gene-Specific Importin Alpha Functions in Development

0234751 Fleming在真核细胞中，细胞质和核区室由核膜分隔。 这种双膜结构包含许多核孔，这些核孔调节分子信息流入和流出细胞核。 这种转运过程的正常运作对于正常的细胞代谢调节以及将发育信号从细胞外和细胞质区室传递到细胞核是必不可少的，从而在细胞分化过程中调节和修饰基因转录。特别是，弗莱明博士将专注于importin a（imp a）基因作为含有经典核定位信号的货物分子的衔接蛋白。imp a基因家族包含三个不同的成员（进化枝）：imp a1、a2和a3。后生动物通常具有三个分支中的每一个的代表。从果蝇到人类的所有三个进化支的进化保守性表明，每个进化支在其与其他进化支的分歧或趋同的能力方面受到限制，这表明每个进化支都进化出了专门的功能。 他选择研究果蝇中的imp a基因家族，因为每个进化枝只有一个基因代表，从而使我们能够评估单个进化枝成员的任何特定功能。这些研究的优点在于明确证明了特定imp a基因在核运输中的独特作用，以及这些基因在其他细胞过程中的作用。阐明这些功能对于理解细胞信号传导和稳态是至关重要的。 预期这些作用将在具有不同进化枝的代表性成员的其他后生动物中保留。他的研究将通过与其他物种的比较，揭示特定功能的进化保守性。此外，本提案中的实验将为本科生提供直接接触当前生物学方法的机会，同时展示从现有数据中得出结论的程度。 这种接触将允许学生根据他们的发现设计额外的实验，并探索科学思想和实验的真实性质。 预计学生将有机会在地方和国家会议上展示他们的研究结果，并在出版物中体验科学界的整体及其促进的互动。

0234751FlemingIn eukaryotic cells, cytoplasmic and nuclear compartments are separated by the nuclear envelope. This double membrane structure contains numerous nuclear pores that regulate the flow of molecular information into and out of the nucleus. Proper functioning of this transport process is essential for normal cellular metabolic regulation as well as the transmission of developmental signals from the extracellular and cytoplasmic compartments to the nucleus so that gene transcription can be regulated and modified during cellular differentiation processes.Many specific transporter molecules have been identified in this process. In particular, Dr. Fleming will focus on the importin a (imp a) genes act as adapter proteins for cargo molecules containing classical nuclear localization signals. The imp a gene family contains three distinct members (clades): imp a1, a2 and a3. Metazoan animals generally have representatives of each of the three clades. The evolutionary conservation of all three clades from Drosophila through human suggests that each clade is constrained in its ability to diverge from or converge on the others, suggesting that each clade has evolved specialized functions. He has chosen to examine the imp a gene family in Drosophila since there are only single genes representing each of the clades, thus allowing us to assess any specific functions of individual clade members.The merit of these studies resides in the definitive demonstration of unique roles for specific imp a genes in nuclear transport and perhaps roles for these genes in other cellular processes. The elucidation of these functions is critical for the understanding of cellular signaling and homeostasis. It is expected that these roles will be conserved in other metazoan animals having representative members of the different imp a clades. His studies will reveal evolutionary conservation of specific functions by comparisons with other species. Additionally, the experimentation within this proposal will provide undergraduate students with direct exposure to current biological methodologies while demonstrating the extent to which conclusions can be drawn from available data. This exposure will allow students to design additional experiments based on their findings and explore the true nature of scientific thought and experimentation. It is further anticipated that students will experience the opportunity to present their findings at local and national meetings and also in publications to experience the totality of the scientific community and the interactions fostered by it.