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Open AccessArticle

Novel Fibrinolytic Protease Producing Streptomyces radiopugnans VITSD8 from Marine Sponges

Department of Biotechnology, School of Bio Sciences and Technology, Vellore Institute of Technology, Vellore-632014, Tamil Nadu, India
Department of Life Sciences, Kristu Jayanti College, Bengaluru-560043, Karnataka, India
Author to whom correspondence should be addressed.
Mar. Drugs 2019, 17(3), 164;
Received: 1 February 2019 / Revised: 3 March 2019 / Accepted: 5 March 2019 / Published: 13 March 2019
(This article belongs to the Special Issue Marine Molecules for the Treatment of Thrombosis)
PDF [4957 KB, uploaded 13 March 2019]


Fibrinolytic enzymes have received more attention due to their medicinal potential for thrombolytic diseases. The aim of this study is to characterize the in vitro fibrinolytic nature of purified protease producing Streptomyces radiopugnans VITSD8 from marine brown tube sponges Agelas conifera. Three varieties of sponge were collected from the Rameshwaram Sea coast, Tamil Nadu, India. The fibrinolytic activity of Streptomyces sp. was screened and determined by casein plasminogen plate and fibrin plate methods respectively. The crude caseinolytic protease was purified using ammonium sulfate fractionation, affinity and ion-exchange chromatography. Based on the morphological, biochemical, and molecular characterization, the isolate VITSD8 was confirmed as Streptomyces radiopugnans. Maltose and peptone were found to be the best carbon and nitrogen sources for the production of fibrinolytic protease. The carbon and nitrogen source peptone showed (781 U/mL) enzyme activity. The optimum pH and temperature for fibrinolytic protease production was found to be 7.0 and 33 °C respectively. The purified enzyme showed a maximum specific activity of 3891 U. The blood clot lysis activity was compared with the standard, and it was concluded that a minimum of 0.18 U (10 µL) of purified protease was required to dissolve the blood clot. This is the first report which exploits the fibrinolytic protease activity of Streptomyces radiopugnans VITSD8 extracted from a marine sponge. Hence the investigation suggests a potential benefit of purified fibrinolytic protease which will serve as an excellent clot buster alternative. View Full-Text
Keywords: marine sponges; marine actinomycetes; Streptomyces radiopugnans VITSD8; fibrinolytic protease; clot busters marine sponges; marine actinomycetes; Streptomyces radiopugnans VITSD8; fibrinolytic protease; clot busters

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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D, D.; S, J.N.; S, M.K.; C, S.D. Novel Fibrinolytic Protease Producing Streptomyces radiopugnans VITSD8 from Marine Sponges. Mar. Drugs 2019, 17, 164.

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