Purification and characterization of a new L-amino acid oxidase from Daboia russellii siamensis venom

A new L-amino acid oxidase (designated as DRS-LAAO) was purified from Daboia russellii siamensis venom by ion-exchange, gel filtration and affinity chromatographies. DRS-LAAO is a homodimeric enzyme with a molecular weight of 120.0 kDa as measured by size

Purif ication and Characterization of Jerdonitin ,a Non2hemorrhagic Metalloproteinase fromTrimeresurus jerdonii Venom

以前从菜花烙铁头蛇毒中分离纯化到J erdonitin 。与其他Ⅱ型蛇毒金属蛋白酶相比, J erdonitin 由金属蛋白酶和去整合素两个结构域组成。但没有检测到其出血和纤维蛋白原降解活性, 推测可能高压液相色谱的有机溶液影响了其酶活性。采用不含高压液相色谱柱层析的新分离手段分离得到J erdonitin 。J erdonitin 在还原和非还原SDS2PAGE 电泳中分别呈现一条表观分子量为38 和36 kDa 的条带。像其他典型的蛇毒金属蛋白酶一样, J erdonitin 优先降解人纤维蛋白原的alpha 链, 并且该活性能被EDTA 完全抑制, 而PMSF 对其没有影响。J er2 donitin 不诱导小白鼠皮下出血。