Fibrinogen supplies the primary building block of the blood clot or thrombus after α-thrombin converts fibrinogen to fibrin during the final phases of coagulation. When the homeostasis system is disrupted, blood clots that aggregate in the blood vessels can lead to thrombosis. Fibrin-degrading enzyme from Bacillus subtilis K2 (Subtilisin K2) of Indonesian moromi has many excellent characteristics apart from its strong fibrinolytic activity. Bioinformatic analysis using the CDART webserver indicated that the enzyme appeared to share a conserved domain with the peptidase s8 superfamily also known as the subtilase family. This study used molecular docking between these fibrin-degrading enzymes and specific substrates (fibrin and fibrinogen) using the HADDOCK webserver and aimed to predict the enzyme mechanism of action. This analysis revealed that the enzyme interlocked with the two substrates; however, it suggested no productive interactions between Subtilisin K2 and fibrinogen. A hydrolysis reaction is suggested between Subtilisin K2 and the fibrin substrate. There was a strong indication that amino acids Asp19, His51, and Ser208 in Subtilisin K2's active site interacts with Leu168, Ile171, and Leu172 of the fibrin substrate with a ∆G of -19.4 kcal/mol. Subtilisin K2 tends to act more as a fibrin-degrading enzyme than as a fibrinogen-degrading enzyme.
Ice cream is a frozen dairy product that includes healthy and nutritious aspects. To improve the value of the health benefits, it is necessary to develop functional ice cream products. One such addition is horn plantain bananas, which have the benefit of having a high dietary fibre and pectin content. In order to make ice cream, gelatin must be used as a stabilizer. The increase of non-halal gelatin has led to improvements in the production of halal gelatin derived from fish. This study was performed to evaluate the effect of adding fish gelatin to the characteristics of plantain banana (Musa paradisiaca
fa. Corniculata)-based ice cream. This study used a pre-experimental design with a fully randomized design and one component, the addition of varying quantities of fish gelatin (A1: 0 %, A2: 0.25 %, and A3: 0.5 %) with three replicates. The characteristics (taste, fragrance, texture, and colour), melting time, and overrun were evaluated. The Duncan Multiple Range Test as post-hoc test was used to continue ANOVA-based data analysis. The results demonstrated that the inclusion of fish gelatin at various levels did not significantly alter the degree of preference for colour, fragrance, flavour, or overrun. Texture and melting time were different (p <0.05). According to this study, the ice cream that the panellists preferred had an average overrun value of 52.67 ± 9.87, a melting time of 26.0 ± 0.1 minutes, and was made using the A3 formulation with 0.5 % fish gelatin.
Fibrinogen supplies the primary building block of the blood clot or thrombus after α-thrombin converts this fibrinogen to fibrin during the final phases of coagulation. When the homeostasis system is disrupted, blood clots that aggregate in the blood vessels can lead to thrombosis. Fibrin degrading enzyme from Bacillus subtilis K2 (Subtilisin K2) has many excellent characteristics with strong fibrinolytic activity. Bioinformatic analysis indicated that the enzyme molecule appeared to share conserved domain, with peptidase s8 super family also known as the subtilase family with its motif: Asp subtilase (motif: VAVIDSGIDSsH), His subtilase (motif: HGTHVAGTIAA) and Ser subtilase (motif: GTSMATPHVAG). Study on molecular docking between this fibrin degrading enzymes and the specific substrates, fibrin and fibrinogen was aimed to predict the mechanism of action. This analysis, revealed no productive interaction between Subtilisin K2 and fibrinogen. However, hydrolysis reaction is indicated strongly between Subtilisin K2 and fibrin substrate. Amino acid Asp19, His51, and Ser208 in the Subtilisin K2's active site interacted with Leu168, Ile171, and Leu172 of the fibrin substrate with [?]G of-19.4 kcal/mol that showed suitable substrate specificity. The fibrin degrading enzyme Subtilisin K2 tend to act more as fibrin degrading enzyme than as fibrinogen degrading enzyme.
<em><span>Data collected by WHO in 2019 shows an estimated 17.9 million (equivalent to 32% of global death). The total number is due to cardiovascular disease, 85% were due to heart attacks and strokes. One of the basic pathophysiologies of stroke is atero-thromboembolic (thrombosis). The accumulation of clots formed by fibrin in blood vessels can inhibit several processes in the body system, such as blood flow, oxygen transportation, and transportation of nutritional and non-nutritional compounds needed. Fibrinolytic enzymes from food microbes have attracted attention for further research as thrombolytic agents. The Bacillus genus from fermented foods can produce strong fibrinolytic enzymes, such as Bacillus natto from natto (Japan), Bacillus subtilis KCK-7 from Chungkook-jang (Korea), Bacillus weihenstephanensis from shrimp paste (Vietnam), Bacillus amyloliquefaciens MH18B1 from Hawaijar (India), Rhizopus chinensis 12 from Chinese wine (China), and Bacillus pumillus and Bacillus subtilis K2 from fermented soybean food products such as tempe gembus, red oncom, and moromi (Indonesia). The high protein content in soybeans can be used as a medium for the growth of proteolytic and fibrinolytic microorganisms. Studies in Asia regarding fibrinolytic enzymes from fermented foods are still limited, even though the Asian region comprises many countries rich in fermented foods. This review is relevant to healthy food ingredients from local fermented foods. Recently, microbial fibrinolytic enzymes from fermented foods have received tremendous interest in the medical field. Many local fermented foods are a potential source of fibrin-degrading enzymes, which can be further developed to treat diseases like stroke and heart attack. This article aims to review microbial fibrinolytic enzymes from various fermented foods and their impact on health, especially thrombosis. This manuscript review uses the narrative review method. From the overall discussion, it can be concluded that fermented foods have properties as fibrinolytic agents.</span></em>
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