• 제목/요약/키워드: metalloprotease

검색결과 145건 처리시간 0.039초

Purification and Properties of a Collagenolytic Protease Produced by Marine Bacterium Vibrio vulnificus CYK279H

  • Kang, Sung-Il;Jang, Young-Boo;Choi, Yeung-Joon;Kong, Jai-Yul
    • Biotechnology and Bioprocess Engineering:BBE
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    • 제10권6호
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    • pp.593-598
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    • 2005
  • A collagenolytic enzyme, produced by Vibrio vulnificus CYK279H, was purified by ultrafiltration, dialysis, Q-Sepharose ion exchange and Superdex-200 gel chromatography. The enzyme from the supernatant was purified 13.2 fold, with a yield of 11.4%. The molecular weight of the purified enzyme was estimated by SDS-PAGE to be approximately 35.0kDa. The N-terminal sequence of the enzyme was determined as Gly-Asp-Pro-Cys-Met-Pro-Ile-Ile-Ser-Asn. The optimum temperature and pH for the enzyme activity were $35^{\circ}C$ and 7.5, respectively. The enzyme activity was stable within the pH and temperature ranges 6.8-8.0 and $20{\sim}35^{\circ}C$, respectively. The purified enzyme was strongly activated by $Zn^{2+},\;Li^{2+},\;and\;Ca^{2+}$, but inhibited by $Cu^{2+}$. In addition, the enzyme was strongly inhibited by 1, 10-phenanthroline and EDTA. The purified enzyme was suggested to be a neutral metalloprotease.

Pretense activity of 80 kDa protein secreted from the apicomplexan parasite Toxoplasma gondii

  • Song, Kyoung-Ju;Nam, Ho-Woo
    • Parasites, Hosts and Diseases
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    • 제41권3호
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    • pp.165-169
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    • 2003
  • This study describes the characterization of 80 kDa pretense showing gelationlytic property among three pretenses in the excretory/secretory proteins (ESP) from Toxoplasma gondii. The pretense activity was detected in the ESP but not in the somatic extract of RH tachyzoites. This pretense was active only in the presence of calcium ion but not other divalent cationic ions such as $Cu^{2+},{\;}Zn^{2+},{\;}Mg^{2+},{\;}and{\;}$Mn^{2+}$, implying that $Ca^{2+}$ is critical factor for the activation of the protease. The 80 kDa pretense was optimally active at pH 7.5. Its gelatinolytic activity was maximal at $37^{\circ}C$, and significant level of enzyme activity of the pretense remained after heat treatment at $56^{\circ}C$ for 30 min or $100^{\circ}C$ for 10 min, This thermostable enzyme was strongly inhibited by metal chelators, i.e., EDTA, EGTA, and 11 10-phenanthroline. Thus, the 80 kDa pretense in the ESP secreted by T. gondii was classified as a calcium dependent neutral metalloprotease.

조직 괴사 활성을 지닌 Aeromonas hydrophila 의 분비 단백질에 관한 연구 (A Potent Tissue Destructive Activity of Secreted Proteins of Aeromonas hydrophila)

  • 김규리;최윤정;강호영
    • 생명과학회지
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    • 제25권2호
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    • pp.214-222
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    • 2015
  • Aeromonas hydrophila는 수생계에 흔히 존재하는 병원체로서 출혈성 패혈증, 수종, 궤양 등의 질병을 유발한다. A. hydrophila는 효과적인 감염과 다양한 환경에서 적응하기 위해 세포 외 물질(Extracellular products, ECPs)을 분비한다. 본 연구에서 사용한 A. hydrophila CK257은 매우 독성이 강한 균주로 균이 분비하는 ECP 역시 쥐, 토끼, 금붕어를 포함한 동물 모델에게 조직 손상을 일으키며 독성을 보였다. 이러한 괴사 반응을 일으키는 원인 요소를 찾기 위해 ECP의 특성을 분석하였고 그 결과, 원인 요소가 단백질이라는 것을 확인하여 이후 단백질 분리 및 정제에 초점을 맞추어 실험을 진행하였다. 균체를 제거한 배양액 상의 분비 단백질을 얻기 위하여 ammonium sulfate 침전법을 사용하였고, 이후 겔 거르기 크로마토그래피(Gel filtration chromatography)를 이용하여 단백질을 정제하였다. 정제 후 단백질은 다섯 개의 분획으로 나뉘었고 이 중 한 개의 분획이 동물 모델에 괴사와 같은 피부 손상을 일으키는 것을 확인하였다. 괴사 활성을 가진 분획의 단백질 4개의 밴드를 MALDI-TOF 시스템을 통해 분석한 결과, Peptidase M35와 Peptidase M28로 밝혀졌으며 이들은 각각 금속촉매효소(metalloprotease)임을 확인할 수 있었다. Peptidase M35와 Peptidase M28의 단백질 분해 효소로써의 기능을 확인하기 위해 카제인 분해 활성을 확인하였고, 다양한 금속 이온을 처리함에 따라 그 활성이 달라지는 것을 관찰할 수 있었다. 또한 조직에 존재하는 단백질의 한 종류인 엘라스틴(elastin) 분해능 역시 확인해 보았다. 본 연구에서는 A. hydrophila가 분비하는 물질 가운데 조직 괴사 활성을 일으키는 것으로 추정되는 Peptidase M35와 Peptidase M28의 두 가지 인자를 확인하여 동정하였다. 이후 두 가지 인자를 결손 시킨 돌연변이주를 구축하여 조직 괴사에 이들이 직접적으로 작용하는지 확인 할 예정이다.

The Expression of Matrix Metalloprotease 20 is Stimulated by Wild Type but not by 4 bp- or 2 bp-Deletion Mutant DLX3

  • Park, Hyun-Jung;Ryoo, Hyun-Mo;Woo, Kyung-Mi;Kim, Gwan-Shik;Baek, Jeong-Hwa
    • International Journal of Oral Biology
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    • 제34권1호
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    • pp.21-28
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    • 2009
  • Mutations in DLX3 are associated with both autosomal dominant hypoplastic hypomaturation amelogenesis imperfecta (ADHHAI) and tricho-dento-osseous (TDO) syndrome. ADHHAI is caused by a c.561_562delCT (2bp-del DLX3) mutation whereas TDO syndrome is associated with a c.571_574delGGGG (4bp-del DLX3) mutation. However, although the causal relationships between DLX3 and an enamel phenotype have been established, the pathophysiological role of DLX3 mutations in enamel development has not yet been clarified. In our current study, we prepared expression vectors for wild type and deletion mutant DLX3 products (4bp-del DLX3, 2bp-del DLX3) and examined the effects of their overexpression on the expression of the enamel matrix proteins and proteases. Wild type DLX3 enhanced the expression of matrix metalloprotease 20 (MMP20) mRNA and protein in murine ameloblast-like cells. However, neither a 4bp-del nor 2bp-del DLX3 increased MMP20 expression. Wild type DLX3, but not the above DLX3 mutants, also increased the activity of reporters containing 1.5 kb or 0.5 kb of the MMP20 promoter. An examination of protein stability showed that the half-life of wild type DLX3 protein was less than 12 h whilst that of both deletion mutants was longer than 24 h. Endogenous Dlx3 was also found to be continuously expressed during ameloblast differentiation. Since inactivating mutations in the gene encoding MMP20 are associated with amelogenesis imperfecta, the inability of 4bp-del or 2bp-del DLX3 to induce MMP20 expression suggests a possible involvement of such mutations in the enamel phenotype associated with TDO syndrome or ADHHAI.

Isolation of Angiotensin I Converting Enzyme (ACE) Inhibitor from fermented oyster, Crassostrea gigas

  • Park, Ji-Young;Je, Jae-Young;Park, Pyo-Jam;Kim, Se-Kwon
    • 한국어업기술학회:학술대회논문집
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    • 한국어업기술학회 2002년도 추계 수산관련학회 공동학술대회발표요지집
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    • pp.193-194
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    • 2002
  • Angiotensin I converting enzyme (ACE) inhibitor was purified from Crassostrea gigas. The ACE belongs to the class of metalloprotease. This enzyme plays an important physiological role in regulating blood pressure of the rennin-angiotensin system by converting from angiotensin I to octapeptide angiotensin II, a potent vasoconstrictor and by inactivating bradykinin, which has depressor action. (omitted)

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Retrovirus-mediated Gene Delivery of TIMP-2 Inhibits Invasiveness, Motility and Angiogenesis

  • Ahn, Seong-Min;Seojin Jeong;Kim, Yeon-Soo;Yeowon Sohn;Aree Moon
    • 한국독성학회:학술대회논문집
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    • 한국독성학회 2003년도 추계학술대회
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    • pp.143-143
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    • 2003
  • The matrix metalloproteases (MMPs) play important roles in invasion, metastasis and angiogenesis in various cell types. An endogenous inhibitor of MMP, tissue inhibitor of metalloprotease-2 (TIMP-2), has high specificity for MMP-2. An imbalance between MMP-2 and TIMP-2 causes the degradation of the extracellular matrix associated with pathological events including invasion, metastasis and angiogenesis.(omitted)

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Detection of Matrix Metalloprotease-9 and Analysis of Protein Patterns in Bovine Vaginal Mucus during Estrus and Pregnancy

  • Kim, Sang-Hwan;Baek, Jun-Seok;Lee, Ho-Jun;Min, Kwan-Sik;Lee, Deuk-Hwan;Yoon, Jong-Taek
    • 한국수정란이식학회지
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    • 제27권2호
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    • pp.93-100
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    • 2012
  • To investigate the biochemical nature of changes in vaginal physiology during estrus and pregnancy, we examined the cytology and viscosity, and monitored the protein expression profile in vaginal mucus during estrus and pregnancy. The viscosity progressively decreased from estrus to pregnancy. Cell type analysis revealed that white blood cells progressively increased from estrus to pregnancy, while red blood cells progressively decreased during pregnancy. The cornification index (CI) was higher in estrus than in pregnancy. Protein mass spectrumetry identified the presence of ribosome-binding protein 1, GRIP 1 (Glutamate receptor-interacting protein 1)-associated protein 1, DUF729 (Domain of unknown function729) domain-containing protein 1, prolactin precursor, dihydrofolatereductase, and MMP (Matrix metalloprotease)-9 in vaginal mucus. MMP-2 and MMP-9 proteins in the vaginal mucus were active throughout estrus and gestation, as measured by a gelatinase assay, but most abundant in the vaginal mucus on day 0 of estrus. Results from ELISA of MMP-2 and MMP-9 were in accordance with the gelatinase assay. In light of the crucial role of metalloproteinases in extracellular matrix remodeling, the level of MMP-9 in vaginal mucus might be useful as an indicator of estrus and pregnancy to increase the efficiency of reproduction.

AGS 인체 위암세포에서 톳 에탄올 추출물에 의한 침윤성 저해 (Inhibition of Cell Invasion by Ethyl Alcohol Extracts of Hizikia fusiforme in AGS Human Gastric Adenocarcinoma Cells)

  • 최영현
    • 생명과학회지
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    • 제20권12호
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    • pp.1784-1791
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    • 2010
  • 본 연구에서는 AGS 인체 위암세포에서 톳 에탄올 추출물(EHF)의 항침윤성과 tight junctions (TJs)의 tightening과의 관계를 조사하였다. EHF에 의한 AGS 위암세포의 증식억제와 연관된 세포이동성 및 침윤성의 감소는 transepithelial electrical resistance의 증가와 연계된 Js의 tightness 증가와 연관성이 있었다. EHF는 matrix metalloprotease (MMP)-2 및 -9의 활성을 억제하였으며, 이는 MMPs의 mRNA 및 단백질 발현 감소에 의한 것이었으나 tissue inhibitor of metalloproteinase (TIMP)-1 및 -2의 mRNA 발현은 증가시켰다. 또한 EHF는 TJs의 주요 조절인자인 claudin family 단백질들(claudin-1, -3 및 -4)의 발현을 감소시켰으며, insulin like growth factor-1 receptor 단백질은 감소된 반면 thrombospondin-1 및 E-cadherin의 발현은 증가되었다. 본 연구의 결과는 톳 추출물이 암의 전이를 효과적으로 억제하는 효능이 있음을 보여주는 결과이다.

Pseudomonas sp. KP-364가 생산하는 Keratinolytic Pretense의 정제 및 성질 (Purification and some Properties of Keratinolytic Protease Produced by Pseudomonas sp. KP-364.)

  • 전동호;강상모;권태종
    • 한국미생물·생명공학회지
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    • 제31권3호
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    • pp.224-229
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    • 2003
  • 경기도 일대의 가금류 공장부근 토양로부터 keratinolytic protease 생산성이 우수한 균주 KP-364를 선별하여 본 효소를 정제하고 일반적인 특성을 조사하였다. 본 효소는 ulkafiltration, ammonium sulfate fiactionation, DEAE-cellulose ion-exchange chromatography, Sephadex G-150 gel filtration 등을 통하여 정제되었으며 회수율은 25.2%이었다 SDS-PAGE와 gel filtration으로. 단일성과 분자량을 추정한 결과 전기영동 상에 단일 band를 나타내었으며 분자량은 약 36,000 dalton이였으며 1개의 subunit로_구성되어 있었다. 효소반응의 최적조건을 검토한 결과 최적 pH는 6.5, pH 3.0에서 10.0까지 90%이상의 활성을 나타냈으며 반응 최적 온도는 $37^{\circ}C$이였고 $60^{\circ}C$에서 1시간동안 80%이상의 활성을 유지하였다. 정제된 효소의 활성은$ FeSo_4$, KCI, $Li_2$$SO_4$를 첨가하였을 때 증가하였으며 $Ag_2$$SO_4$, $CuCl_2$, $HgCl_2$에 의해 저해되었다. 또한 EDTA, EGTA에 의해 저해되는 것으로 보아 metalloprotease의 일종이라고 판단되며 $Li^{ +}$를 cofactor로 함유하고 있는 것으로 조사되었다.