We synthesized a new affinity gel (PKSI-Toyopearl) using a selective synthetic inhibitor of plasma kallikrein (PKSI-527) as an affinity ligand, and employed it for the rapid purification of plasma kallikrein from human plasma. Human plasma activated with kaolin after acid treatment was applied to a PKSI-Toyopearl column. Adsorbed protein was eluted with 50 mM glycine-hydrochloric acid buffer (pH 3.0). Plasma kallikrein was purified 181-fold with a yield of 85% from the kaolin-activated plasma. Further purification was performed by chromatography on a DEAE-Toyopearl 650M column. Plasma kallikrein was finally purified 1720-fold with a 63% yield by these procedures. On sodium dodecyl sulfate (SDS) polyacrylamide gel electrophoresis, a band was observed at approximately 88 kDa. These findings indicate that PKSI-Toyopearl is a valuable tool for the purification of plasma kallikrein from human plasma.
我们以血浆胰激肽原的选择性合成
抑制剂(PKSI-527)为亲和
配体,合成了一种新的亲和凝胶(PKSI-Toyopearl),并将其用于从人血浆中快速纯化血浆胰激肽原。用酸处理后的
高岭土活化的人体血浆被应用于 PKSI-Toyopearl 柱。吸附的蛋白质用 50 mM 甘
氨酸-
盐酸缓冲液(pH 3.0)洗脱。从
高岭土活化的血浆中纯化出 181 倍的血浆allikrein,产率为 85%。使用
DEAE-Toyopearl 650M 色谱柱进一步纯化。通过这些程序,血浆中的allikrein最终纯化了1720倍,产率为63%。在
十二烷基硫酸钠(
SDS)聚
丙烯酰胺凝胶电泳中,观察到一条大约 88 kDa 的条带。这些研究结果表明,PKSI-Toyopearl 是从人体血浆中纯化血浆胰激肽原的重要工具。