• Title/Summary/Keyword: Biophysics

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Glutathione and Glutathione-Related Enzymes during Dictyostelium Development

  • Kim, Beom-Jun;Park, Chang-hoon;Kang, Sa-Ouk
    • 한국생물물리학회:학술대회논문집
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    • 한국생물물리학회 2002년도 제9회 학술 발표회 프로그램과 논문초록
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    • pp.48-48
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    • 2002
  • Glutathione (GSH) is most prevalent reducing thiols in eukaryotic cells and known that participates in many cellular processes. It was found that total amount of glutathione and the ratio of reduced to oxidized glutathione during development of Dictyostelium discoideum increase at the initial stage of the aggregation of amoeba.(omitted)

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Characterization of Activator of Photopigment and puc Expression, AppA from Rhodobacter sphaeroides 2.4.1

  • Yun, Sang-Hee;Cho, Seung-Hyun;Sa-Ouk kang
    • 한국생물물리학회:학술대회논문집
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    • 한국생물물리학회 2001년도 학술 발표회 진행표 및 논문초록
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    • pp.50-50
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    • 2001
  • Rhodobacter sphaeroides 2.4.1 is a facultatively photoheterotrophic bacterium. The AppA protein is required for increased photo system gene expression upon transition from aerobic respiration to anaerobic photosynthesis condition. This protein has FAD binding domain in amino terminus and cysteine-rich motif in carboxy terminus.(omitted)

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Identification of a Protein that Interacts with Calcium-Binding Protein 3(CBP3) in Dictyostelium discoideum

  • Jung, Sun-Young;Lee, Chang-Hun;Kang, Sa-Ouk
    • 한국생물물리학회:학술대회논문집
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    • 한국생물물리학회 2001년도 학술 발표회 진행표 및 논문초록
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    • pp.43-43
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    • 2001
  • In cells of the eukaryotic microorganism Dictyostelium discoideum, at least eight small, four-EF hand calcium-binding proteins respectively are expressed at specific stages during development. One of these proteins, calcium-binding protein 3 (CBP3), first appears just prior to cell aggregation and then maintains relatively constant levels throughout development.(omitted)

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The effect of surface charge balance on thermodynamic stability and kinetics of refolding of firefly luciferase

  • Khalifeh, Khosrow;Ranjbar, Bijan;Alipour, Bagher Said;Hosseinkhani, Saman
    • BMB Reports
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    • 제44권2호
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    • pp.102-106
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    • 2011
  • Thermodynamic stability and refolding kinetics of firefly luciferase and three representative mutants with depletion of negative charge on a flexible loop via substitution of Glu by Arg (ER mutant) or Lys (EK mutant) as well as insertion of another Arg in ER mutants (ERR mutant) was investigated. According to thermodynamic studies, structural stability of ERR and ER mutants are enhanced compared to WT protein, whereas, these mutants become prone to aggregation at higher temperatures. Accordingly, it was concluded that enhanced structural stability of mutants depends on more compactness of folded state, whereas aggregation at higher temperatures in mutants is due to weakening of intermolecular repulsive electrostatic interactions and increase of intermolecular hydrophobic interactions. Kinetic results indicate that early events of protein folding are accelerated in mutants.