• Title/Summary/Keyword: fibrinolytic enzyme

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Purification and Characterization of a Fibrinolytic Enzyme from Snake Venom of Macrovipera lebetina turanica

  • Kwon, Ki-Rok;Park, Do-Il;Lee, Seung-Bae;Choi, Suk-Ho
    • Journal of Pharmacopuncture
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    • v.14 no.2
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    • pp.5-14
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    • 2011
  • Objectives: Fibrinolytic enzyme preparations were isolated from the snake venom of Macrovipera lebetica turanica in this study. Methods: The purity of the preparations was determined using SDS-PAGE and the enzymic characteristics of the purified fibrinolytic enzyme were determined. Results: 1. All of the two preparations with fibrinolytic activity obtained from the snake venom of M. l. turanicat contained the major polypeptide with the molecular weight of 27,500. One of the preparation showed purified fibrinolytic enzyme. 2. The purified fibrinolytic enzyme hydrolyzed ${\alpha}$-chain of fibrinogen faster than ${\beta}$-chain but not ${\gamma}$-chain. 3. The fibrinolytic activity was inhibited completely by EDTA, EGTA, 1,10-phenanthroline, and dithiothreitol. 4. The fibrinolytic activity was inhibited completely by calcium chloride, iron(III) chloride, mercuric chloride, and cobalt (II) chloride. 5. The fibrinolysis zone formed after addition of zinc sulfate was smaller but clearer than the control. Conclusions: These results suggested that the fibrinolytic enzyme purifed from the snake venom of M. l turanica was a metalloprotease containing dithiol group.

Optimization of the Production of Fibrinolytic Enzyme from Bacillus firmus NA-1 in Fermented Soybeans

  • Seo, Ji-Hyun;Lee, Sam-Pin
    • Preventive Nutrition and Food Science
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    • v.9 no.1
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    • pp.14-20
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    • 2004
  • Bacillus strains capable of producing fibrinolytic enzyme were isolated from traditional fermented Korean soybean paste and Japanese fermented soybean (Natto). Among the 16 strains, a selected Bacillus sp. was identified as bacillus firmus, with 80.7% homology, by API kit analysis. Seed starter or B. firmus NA-1 was prepared with 5% soymilk prepared from micronized soybean powder. To produce fibrinolytic enzyme by B. firmus NA-1 the liquid culture was performed with NB broth (pH 7.0) fortified with 1% galactose, 0.1% tryptone, and 0.5% $K_2$HPO$_4$, by shaking with 180 rpm at 37$^{\circ}C$. Fibrinolytic enzyme activity reached the highest value at 7.8 unit/mL (plasmin unit) after fermentation for 72 hr. The crude fibrinolytic enzyme showed higher relative activity in the range of pH 7.0∼9.0. The activity of crude fibrinolytic enzyme was well maintained even after concentration by the vacuum evaporation at 5$0^{\circ}C$ for 1 hr.

Effect of Medium Components on the Productivity of Fibrinolytic Enzyme in Bacillus sp (배지 조성에 따른 Bacillus sp. 의 혈전 용해효소 생산효과)

  • 김영숙
    • Journal of Life Science
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    • v.9 no.4
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    • pp.489-492
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    • 1999
  • A bacteial strain which can produce the extracellular fibrinolytic enzyme was isolated from Jeot-Gal (anchovy) that was Korean traditional salt-fermented fish. The isolated bacterium was identified to be a strain of Bacillus sp. The optimal medium for fibrinolytic enzyme production was determined to consist of 5 g maltose, 10 g defatted soybean, 20 g sodium chloride, 1.75 g K2HPO4 per liter (pH 7.0)

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Purification and Characterization of Fibrinolytic Enzyme Excreted by Bacillus subtilis K-54 Isolated from Chung Guk Jang. (청국장에서 분리한 Bacillus subtilis K-54가 분비하는 혈전용해효소의 정제 및 특성)

  • 유천권;서원상;이철수;강상모
    • Microbiology and Biotechnology Letters
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    • v.26 no.6
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    • pp.507-514
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    • 1998
  • The strain K-54, the best producer of fibrinolytic enzyme, was isolated from Korean traditional food Chung Guk Jang and identified as Bacillus subtilis. Fibrinolytic enzyme was purified and characterized, and its molecular weight was determined. The fibrinolytic enzyme activity was increased about 66.9 times via purification with recovery yield of 10.1%. The optimum pH and temperature of this enzyme were 11 and $65^{\circ}C$. The enzyme was stable within a pH range 8-12 and unstable at 9$0^{\circ}C$. The molecular weight was estimated to be 29,000 dalton in the form of monomer with no other subunit. The isoelectric point was calculated 8.67. N-terminal sequence was identified Ala-Gly-Ser-Val-Pro-Try-Gly-Ser. Km value of the enzyme for $\alpha$-casein was calculated to be 0.31 (3.1 mg/$m\ell$). The enzyme activity highly inhibited by PMSF at 1 nM.

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The Optimal Conditions for Fibrinolytic Enzyme Production from Streptomyces sp. JK-20 (Streptomyces sp. JK-20유래 혈전용해효소의 생산조건)

  • 정영기;전홍기;김유정
    • Journal of Life Science
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    • v.12 no.1
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    • pp.43-48
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    • 2002
  • An actinomycetes which produces fibrinolytic enzyme was isolated from soil. Characteristics of the isolated strain and the optimal conditions for the productions of fibrinolytic enzyme were summarized as follows; The fibrinolytic enzyme production strain generates gray airmycelium and had about 0.6~0.8$\times$0.4~0.8${\mu}{\textrm}{m}$ cylindrical spore, smooth surface and formed spore chain of 10~40 spores. We have identified this strain as Streptomyces sp. JK-20. This strain was able to grow up at 20~32$^{\circ}C$ and its optimum growth temperature and pH was 24$^{\circ}C$ and pH 6.0, respectively. The optimal conditions for porducing fibrinolytic enzyme; carbon source, nitrogen source, metal ions and phosphorous sources was 1% xylose, 0.5% yeast extract, 0.5% polypepton, 0.1% MgSO$_4$.7$H_2O$ and 0.1% NaH$_2$PO$_4$.2$H_2O$, respectively. This strain showed the highest productivity of fibrinolytic enzyme after the fourth day under such optimal culture conditions.

Purification and Characteristics of Fibrinolytic Enzyme from Chongkukjang

  • Yang, Jeong-Lye;Kim, Hee-Sook;Hong, Jeong-Hwa;Song, Young-Sun
    • Preventive Nutrition and Food Science
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    • v.11 no.2
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    • pp.127-132
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    • 2006
  • Bacillus sp. strain K-l, which produces a strong fibrinolytic enzyme, was isolated from chongkukjang, a traditional Korean fermented soybean paste. The fibrinolytic enzyme was purified from chongkukjang base by using ammonium sulfate fractionation and chromatographic techniques. Purified enzyme, CK K-1 was demonstrated to be homogeneous by SDS-PAGE and isoelectric focusing electrophoresis, and has molecular mass of a 12.4 kDa and a pI of 8.0. The optimal reaction pH value and temperature were 8.0 and $40^{\circ}C$, respectively. Phenyl-methyl-sulfonyl-fluoride (PMSF; serine protease inhibitor), ethylene-diamine-tetra-acetic acid (EDTA; metallo protease inhibitor), copper ion, ferric ion and lead ion inhibited the enzyme activity. These results indicated that the fibrinolytic enzyme is a metallo-serine protease and different from nattokinase and chongkukjangkinase.

Purification and Characterization of Fibrinolytic Enzyme from Armillariella mellea (뽕나무버섯으로부터 Fibrinolytic enzyme의 정제 및 특성 연구)

  • Kim, Jun-Ho;Kim, Yang-Sun
    • The Korean Journal of Mycology
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    • v.26 no.4
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    • pp.583-588
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    • 1998
  • A fibrinolytic enzyme has been isolated from the edible honey mushroom, Armillariella mellea and purified. The apparent molecular mass of purified enzyme was estimated to be 19800Da by SDS polyacryl amide gel electrophoresis and 19900Da by gel filtration, indicating that it was a monomer. The enzyme was optimal at pH 7, suggesting that the purified enzyme was a neutral proteinase. It shows the maximum fibrinolytic activity at $55^{\circ}C$, is completely inactivated above $65^{\circ}C$, and still indicates 40% of activity at $37^{\circ}C$. The fibrinolytic activity has been decreased by the addition of EDTA. Fifteen amino acid sequence was determined by protein sequencing techniques.

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Screening of Fibrinolytic Enzyme Producing from Microorganisms in Korean Fermented Soybean Paste and Optimum Conditions of Enzyme Production. (된장 유래 혈전분해효소 생산균주의 분리 및 최적 효소생산 조건 탐색)

  • Ok Min;Choi Young-Su
    • Korean Journal of Food Preservation
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    • v.12 no.6
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    • pp.643-649
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    • 2005
  • This study was investigated to find out optimal medium maximizing the production of fibrinolytic enzyme by Bacillus sp. isolated from Korean fermented soybean paste, which could hydrolyze the fibrin produced through the blood coagulation mechanism in human body. Among carbon sources tested, galactose was most effective for the enzyme production, and the level of the concentration for the optimal enzyme production was $4\%$(w/v). For nitrogen sources tested, malt extract was most effective for the enzyme production, and level of the concentration for optimal enzyme production was $4\%$(w/v). For mineral sources tested, $K_2HPO_4$ was most effective for enzyme production. The enzyme was maximally produced by cultivating the organism at the liquid medium of the initial pH 6 and temperature of $40^{\circ}C$.

Medium Optimization for Fibrinolytic Enzyme Production by Bacillus subtilis KCK-7 Isolated from Korean Traditional Chungkookjang. (청국장으로부터 분리한 Bacillus subtilis KCK-7에 의한 fibrin분해 효소 생산 배지 최적화)

  • Lee, Si-Kyung;Heo, Seok;Bae, Dong-Ho;Choi, Kee-Hyun
    • Microbiology and Biotechnology Letters
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    • v.26 no.3
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    • pp.226-231
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    • 1998
  • The medium optimization was investigated to maximize the production of fibrinolytic enzyme by Bacillus subtilis KCK-7 isolated from Chungkookjang, which could hydrolyze the fibrin produced through the blood coagulation mechanism in human body. The simultaneous addition of 5% soluble starch and 0.5% cellobiose to the medium as carbon sources resulted in the highest production of the fibrinolytic enzyme. Likewise, the optimized composition of medium appeared to be 0.5% peptone, 0.3% beef extract, 0.5% cellobiose, 5% soluble starch, 2% raw soybean meal and 0.02% Na$_2$HPO$_4$. In addition, the fibrinolytic enzyme production by Bacillus subtilis KCK-7 reached to the maximum level after the cultivation for 48 hr, using the optimized medium.

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Isolation and Characterization of a 32-kDa Fibrinolytic Enzyme (FE-32kDa) from Gloydius blomhoffii siniticus Venom -Fibrinolytic Enzyme from Gloydius blomhoffii siniticus Venom-

  • Kim, Joung-Yoon;Lee, Seung-Bae;Kwon, Ki Rok;Choi, Suk-Ho
    • Journal of Pharmacopuncture
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    • v.17 no.1
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    • pp.44-50
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    • 2014
  • Objectives: This study was undertaken to isolate a fibrinolytic enzyme from the snake venom of Gloydius blomhoffii siniticus and to investigate its enzymatic characteristics and hemorrhagic activity as a potential pharmacopuncture agent. Methods: The fibrinolytic enzyme was isolated by using chromatography, sodium dodecyl sulfate-polyacrylamide gel electrophoresis, and fibrin plate assay. The characteristics of the enzyme were investigated using fibrin plate assay, protein hydrolysis analysis, and hemorrhage assay. Its amino acid composition was determined. Results: The fibrinolytic enzyme with the molecular weight of 32kDa (FE-32kDa) from Gloydius blomhoffii siniticus showed a fibrin hydrolysis zone at the concentration of 0.2 mg/mL in the fibrin plate assay. The fibrin hydrolysis activity of the enzyme was inhibited completely by ethylenediaminetetraacetic acid (EDTA), ethyleneglycoltetraacetic acid (EGTA), and 1, 10-phenanthroline, thiothreitol and cysteine, and partially by phenylmethanesulfonylfluoride (PMSF). Metal ions such as $Fe^{2+}$ and $Hg^{2+}$ inhibited the fibrin hydrolysis completely, but $Zn^{2+}$ enhanced it. FE-32kDa hydrolyzed ${\alpha}$-chain but did not hydrolyze ${\beta}$-chain and ${\gamma}$-chain of fibrinogen. High-molecular-weight polypeptides of gelatin were hydrolyzed partially into low-molecular-weight polypeptides, but the extent of hydrolysis was limited. FE-32kDa induced hemorrhage beneath back skin of mice at the dose of $2{\mu}g$. Conclusions: FE-32kDa is a ${\alpha}$-fibrin(ogen)olytic metalloprotease that requires $Zn^{2+}$ for fibrinolytic activity and causes hemorrhage, suggesting that the enzyme is not appropriate for use as a clinical pharmacopuncture.