Johnston K H, Zabriskie J B
J Exp Med. 1986 Mar 1;163(3):697-712. doi: 10.1084/jem.163.3.697.
We report the isolation and purification of the nephritis strain-associated protein (NSAP) first described by Villareal et al. (8). Amino acid analysis, and determination of the first 21 amino-terminal amino acids indicated that this 46 kD protein is a streptokinase. Biochemical analysis confirmed that NSAP could act as a plasminogen activator; immunological investigations indicated that NSAP is antigenically different from streptokinase from group C streptococcus, and possibly represents a unique streptokinase. It is this uniqueness that may contribute to the role of NSAP in the pathogenesis of acute poststreptococcal glomerulonephritis.
我们报道了对肾炎菌株相关蛋白(NSAP)的分离和纯化,该蛋白最初由比利亚雷亚尔等人描述(8)。氨基酸分析以及对前21个氨基末端氨基酸的测定表明,这种46 kD的蛋白质是一种链激酶。生化分析证实NSAP可作为纤溶酶原激活剂;免疫学研究表明,NSAP在抗原性上与C组链球菌的链激酶不同,可能代表一种独特的链激酶。正是这种独特性可能导致NSAP在急性链球菌感染后肾小球肾炎发病机制中发挥作用。