鼠伤寒沙门氏菌中的可溶性和膜结合天冬氨酸结合活性。
Soluble and membrane-bound aspartate-binding activities in Salmonella typhimurium.
作者信息
Aksamit R R, Howlett B J, Koshland D E
出版信息
J Bacteriol. 1975 Sep;123(3):1000-5. doi: 10.1128/jb.123.3.1000-1005.1975.
Abstract
The specificities of the soluble and membrane aspartate-binding activities were compared with each other and with the specificity of aspartate chemotaxis and were found to be distinct. The soluble aspartate-binding protein was purified to homogeneity and had a molecular weight of 30,000. The dissociation constant was 10(-6) M for aspartate, and the protein bound glutamate, cysteic acid, and 2-amino-3-phosphonopropionate. Aspartate transport was inhibited by cysteic acid.
摘要
将可溶性和膜结合天冬氨酸结合活性的特异性相互比较，并与天冬氨酸趋化性的特异性进行比较，发现它们是不同的。可溶性天冬氨酸结合蛋白被纯化至同质，分子量为30,000。天冬氨酸的解离常数为10^(-6) M，该蛋白结合谷氨酸、半胱氨酸和2-氨基-3-膦酰丙酸。半胱氨酸抑制天冬氨酸转运。
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