Abstract:
본 발명은 폴리-시스테인 펩티드 융합 재조합 알부민 및 이의 제조방법에 관한 것으로서, 보다 상세하게는 알부민의 N-말단과 C-말단에 약물 결합에 이용될 수 있는 시스테인의 갯수가 증폭되어 있는 재조합 알부민 및 이의 제조방법에 관한 것이다. 본 발명의 재조합 알부민은 약물 전달체용으로 사용시에 알부민-약물 컨쥬게이션 효율을 향상시키므로 다량의 약물을 표적 조직에 효과적으로 전달할 수 있고, 융합된 시스테인의 갯수를 조절함으로써 알부민 단일 개체당 결합되는 약물의 갯수를 조절할 수 있으므로 기존 알부민 전달체의 부작용을 개선한 우수한 약물 전달체로 사용될 수 있으며, 또한, 이러한 재조합 알부민을 분자 영상용 형광체 및 조영제 등과 결합시켜 비침습적으로 실시간 질병 진단 및 치료와 신약의 스크리닝에 활용할 수 있다. 폴리-시스테인 펩티드, 재조합 알부민, 약물 결합, 약물 전달, 분자 영상
Abstract:
PURPOSE: A biosensor for detecting Atg4B protease containing a polypeptide specifically recognized by Atg4B protease is provided to effectively detect the protease. CONSTITUTION: A biosensor for detecting Atg4B(Arabidopsis autophagy-related proteins 4b) protease contains polypeptides with 3-20 amino acid residues having an amino acid sequence of chemical formula 1(R1-R2-Gly). In chemical formula 1, R1 is Thr or Val; and R2 is Phe or Tyr. The biosensor contains polypeptides and polymer-linked conjugate for forming nanoparticles. A composition for Atg4B protease reaction contains the biosensor.
Abstract:
PURPOSE: A fusion protein of ferritin and GALA peptides and a cage protein containing the same are provided to effectively release drug under a weak acid condition and to be applied as a biosensor. CONSTITUTION: A fusion protein contains a GALA(Glu-Ala-Leu-Ala) motif containing an amino acid sequence of sequence number 13 linked to C-terminal of a polypeptide of a fragment containing ferritin protein, A-helix, B-helix, C-helix, and D-helix or mutant thereof. The ferritin is denoted by amino acid sequence number 1. The fragment is denoted by amino acid sequence 3. The GALA motif contains 4-100 amino acids of amino acid sequence number 13 and is denoted by amino acid sequence number 5 or 7. A cage protein contains the fusion protein.
Abstract:
PURPOSE: A fusion protein containing low molecular heat shock protein and a cage protein formed by the same are provided to emit high fluorescence signal. CONSTITUTION: A fusion protein contains a recognition site of a protease and histidine polymers linked to low molecular heat shock protein(HSP). The low molecular HSP is a polypeptide of amino acid sequence 6 or fragment or mutant thereof. The protease is caspase, matrix metalloproteinase(MMP), cathepsin S, or viral protease. The recognition site is a polypeptide having 4-20 amino acid residue containing a cysteine residue. A cage protein contains the fusion proteins.
Abstract:
PURPOSE: Aqueous-dispersed chemical-luminescent nanoparticles, a producing method thereof, and a use thereof are provided to accurately and extensively diagnose active oxygen related disease by directly imaging hydrogen peroxide. CONSTITUTION: Aqueous-dispersed chemical-luminescent nanoparticles contain the following: 0.01~3wt% of core containing a hydrophobic chemical-luminescent substance; 0.5~30wt% of surfactant surrounding the core; and 67~99.49wt% water. The luminescent wavelength of the hydrophobic chemical-luminescent substance is 650~900nm. The hydrophobic chemical-luminescent substance is formed with a peroxyoxalate derivative and a fluorescent material. The surfactant is poloxamer.
Abstract:
PURPOSE: A plasmid for expressing protein containing thioredoxin as a fusion partner is provided to easily remove thioredoxin and to massively produce a target protein. CONSTITUTION: A pET-32-S(-) plasmid contains a multi-cloning site for inserting thioredoxin gene, thrombin recognition site, S-tag coding region, and a gene encoding a target protein. A method for producing the target protein comprises: a step of inserting the gene encoding target protein into a multi-cloning site of a plasmid; a step of transforming the plasmid to E.coli and culturing; and a step of treating thrombine.