鲁氏毛霉菌丝体膜在细胞壁基质聚合物合成与分泌中的作用
Role of membranes of mycelial Mucor rouxii in synthesis and secretion of cell wall matrix polymers.
作者信息
Dow J M, Carreon R R, Villa V D
出版信息
J Bacteriol. 1981 Jan;145(1):272-9. doi: 10.1128/jb.145.1.272-279.1981.
Abstract
Membrane fractions of the mycelial form of Mucor rouxii contained endogenous polyuronides and glycoproteins with sugar compositions similar to the cell wall polyuronide (mucoran) and extracellular (wall and filtrate) glycoproteins, respectively. The polyuronide pool was rapidly labeled with D-[U-14C]glucose and on pulse-chase experiments appeared to turn over, suggesting that these polymers were precursors of the wall mucoran. In contrast, the glycoproteins appeared to accumulate. Although the membrane-associated glycoproteins had molecular weights similar to those of the extracellular glycoproteins, the bulk of the membrane-associated polyuronides were of a molecular weight lower than that of the wall polyuronide.
摘要
鲁氏毛霉丝状菌体的膜组分含有内源性聚糖醛酸和糖蛋白，其糖组成分别与细胞壁聚糖醛酸（粘霉聚糖）和细胞外（壁和滤液）糖蛋白相似。聚糖醛酸库被D-[U-14C]葡萄糖迅速标记，在脉冲追踪实验中似乎发生了周转，表明这些聚合物是壁粘霉聚糖的前体。相比之下，糖蛋白似乎会积累。尽管与膜相关的糖蛋白的分子量与细胞外糖蛋白的分子量相似，但与膜相关的聚糖醛酸大部分分子量低于壁聚糖醛酸的分子量。
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