MAGP: A Matricellular Protein with Multiple Functions

超出所提供的空间。与基质相关的信号事件直接影响细胞分化、增殖和迁移，从而影响胚胎发生、组织修复和广泛的疾病，如癌症、血管疾病和肺发育。近年来，有人提出一些ECM蛋白可以在细胞外和细胞内同时起作用。微纤维相关糖蛋白-1 （MAGP1）就是这样一种蛋白。除了其作为微原纤维成分的细胞外作用外，还可以发现一种可选择剪接形式的MAGP1作为一种稳定的细胞内蛋白，对细胞施加调节功能。本应用程序中描述的实验将侧重于描述MAGP1的细胞内和细胞外功能，特别是它们与富含弹性蛋白的组织的发育和调节有关。我们将研究MAGP在弹性纤维组装和影响分化特异性基因表达方面发挥主要作用的假设。我们还将评估使用MAGP1的独特结构域（基质结合结构域）将生物活性分子靶向细胞外基质的可能性。我们的具体目标是：1。为了更好地定义MAGP作为微纤维蛋白的功能作用，并表征其与原纤维蛋白的相互作用。2. 确定MAGP1的二级和三级结构，重点研究其基质结合结构域。3. 了解MAGP1及其细胞内选择性剪接异构体如何影响细胞粘附、细胞表型和组织发育。4. 表征MAGP1基因的启动子序列，并确定细胞分化过程中组织表达和调控的关键区域。网站性能 ======================================== 节结束 ===========================================

EXCEED THE SPACE PROVIDED. Matrix-associated signaling events directly influence cell differentiation, proliferation and migration, thereby impacting embryogenesis, tissue repair, and a wide range of diseases such as cancer, vascular disease, and lung development. In recent years, there has been the suggestion that some ECM proteins can act both extracellularly and intracellularly. MAGP1 (microfibril associated glycoprotein-1) is one such protein. In addition to its extracellular role as a component of microfibrils, an alternatively spliced form of MAGP1 can be found as a stable, intracellular protein that exerts a regulatory function on the cell. The experimentation described in this application will focus on Idelineating the intracellular and extracellular functions of MAGP1, particularly as they relate to development and regulation of elastin-rich tissues. We will investigate the hypothesis that MAGP plays a major role in both elastic fiber assembly and in influencing expression of differentiation-specific genes. We will also assess the possibility of Iusing a unique domain of MAGP1 (the matrix-binding domain) to target biologically active molecules to the extracellular matrix. Our specific aims are: 1. To better define the functional role of MAGP as a microfibrillar protein and characterize its interactions with fibrillin. 2. To ascertain the second & tertiary structure of MAGP1, focusing on the matrix-binding domain. 3. To understand how MAGP1 and its intracellular alternatively spliced isoforms influence cell adhesion, cell phenotypes, and tissue development. 4. To characterize the promoter sequences of the MAGP1 gene and to identify the critical regions for tissue expression and regulation during cell differentiation. PERFORMANCE SITE ========================================Section End===========================================