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Contribution of Streptokinase-Domains from Groups G and A (SK2a) Streptococci in Amidolytic/Proteolytic Activities and Fibrin-Dependent Plasminogen activation: A Domain-Exchange Study.

Maryam Rafipour | Malihe Keramati | Mohammad Mehdi Aslani | Arash Arashkia | Farzin Roohvand
Iranian biomedical journal | 2020

Streptokinase (SK), a heterogeneous plasminogen activator (PA) protein from groups A, C, and G streptococci (GAS, GCS, GGS, respectively) contains three structural domains (SKα, SKβ, and SK). Based on the variable region of SKβ, GAS-SK (ska) are clustered as SK1 and SK2 (including cluster2-streptokinase (SK2a)/SK2b), which show low and high fibrinogen (FG)-dependent plasminogen (Plg) activation properties, respectively. Despite being co-clustered as SK2a, GCS/GGS-SK (skcg) variants display properties similar to SK1. Herein, by SKβ exchange between GGS (G88) and GAS-SK2a (STAB902) variants, the potential roles of SK domains in amidolytic/proteolytic activity and FG-bound-Plg activation are represented.

Pubmed ID: 31454859

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