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引用次数: 4
摘要
CD147也被称为BSG,首次从F9个胚胎癌细胞中发现(Miyauchi et al., 1990),人类BSG位点位于染色体19p13.3上,含有10个外显子(Belton et al., 2008;Kaname et al., 1993;Liao et al., 2011),其编码四种选择性剪接转录物:CD147/ bsg -1,2,3,4 (Kaname et al., 1993;廖等人,2011)。Bsg-1具有3个igg样结构域(CD147/Bsg-1) (Hanna et al., 2003;ochritor et al., 2003),而CD147/ bsg -3,4包含一个单一的igg样结构域(Belton et al., 2008;廖等人,2011)。有证据表明,CD147/Bsg-2是最丰富和最具特征的剪接产物,它包含两个Ig-like结构域(Weidle et al., 2010)。氨基酸分析表明,CD147包含一个由21个氨基酸组成的单链I型跨膜结构域、一个由186个氨基酸组成的胞外结构域和一个由41个残基组成的胞质结构域(Kanekura et al., 2010;尤尔琴科等人,2005)。CD147 n端结构域的三个保守天冬酰胺(Asn 44、152和186)有三个糖基化位点(Fadool et al., 1993;Tang et al., 2004;Yu et al., 2006),这可以解释CD147的分子质量从Western blotting预测的27 kDa左右转移到40-65 kDa。特异性抑制剂对糖基化的抑制表明,在含有β-1,6支链的聚乳糖胺型糖的碳水化合物侧基上,聚焦化是CD147 n -糖基化的主要糖基化类型(Ni et al., 2014;Riethdorf et al., 2006;Tang et al., 2004)。此外,CD147的n -糖基化已被确定为低糖基化(约32 kDa)或高糖基化(约45-65 kDa)。完全糖基化的成熟CD147(高糖基化的CD147)易位到质膜,而低糖基化的CD147是内质网中高糖基化的CD147的前体,在细胞表面表达之前需要在高尔基体中进行额外的修饰;高水平的糖基化是CD147的主要生化特性(Jia et al., 2006;Jiang et al., 2014;Ni et al., 2014;Tang et al., 2004)。
期刊介绍:
Journal of Investigative Dermatology Symposium Proceedings (JIDSP) publishes peer-reviewed, invited papers relevant to all aspects of cutaneous biology and skin disease. Papers in the JIDSP are often initially presented at a scientific meeting. Potential topics include biochemistry, biophysics, carcinogenesis, cellular growth and regulation, clinical research, development, epidemiology and other population-based research, extracellular matrix, genetics, immunology, melanocyte biology, microbiology, molecular and cell biology, pathology, pharmacology and percutaneous absorption, photobiology, physiology, and skin structure.