Abstract:
본 발명은 인간의 B형 간염을 치료하기 위해서 HBV 중합효소 저해역가를 가진 미생물인 스트렙토마이세스 DWJJ 839(Streptomyces sp. DWJJ 839)를 분리하여 시험관내(in vitro) 실험을 통해 HBV 중합효소 저해 역가를 측정한후 이 균주를 발효조를 이용하여 대량 배양하여 배양액을 용매추출과 칼럼크로마토그래피 과정을 거쳐 HBV 저해역가를 가진 물질만을 분리 정제하여 제제화하는 방법에 관한 것이다. 특히 본 발명은 공지물질이지만 간염치료제로서의 용도가 알려진 바가 없던 프테리딘 유도체가 인간 B형 간염 치료제로서의 용도를 제공하는 특징을 가진다.
Abstract:
PURPOSE: A method for producing TNF Related Apoptosis Inducing Ligand(TRAIL) protein, and for crystallizing the TRAIL protein and the three-dimensional structure thereof are provided, thereby TRAIL protein having improved activity, which specifically kills cancer cells and cells infected by virus, can be produced. CONSTITUTION: The TRAIL having sequence No. 2 is produced by the steps of: inserting the human TRAIL protein gene into a plasmid to produce pET3a-TLS; transforming E. coli with pET3a-TLS to produce E. coli BL21-TLS(pET3a-TLS)(KCCM-10169); incubating the transformed E. coli BL21-TLS(pET3a-TLS)(KCCM-10169) at 22 to 37 deg. C and adding IPTG during incubation to express the TRAIL gene; breaking the cells, collecting insoluble fragments, denaturing and refolding the fragments to collect soluble protein; treating the soluble fragment and soluble protein with cationic exchange chromatography and size excluding chromatography to isolate and purify the TRAIL protein. The TRAIL protein is crystallized by using a solution containing 20 to 40% of PEG MME550, 0.02 to 0.5M of bicine, and 0.02 to 0.5M of sodium chloride, then reacting 24 μg of TRAIL protein and a precipitation solution containing 20 to 30% of PEG MME550, 10 to 100mM bicine, and 5 to 20mM of cadmium chloride. The three-dimensional structure of TRAIL protein consists of an inner sheet comprising strand A, A'', H, C and H; an outer sheet comprising strand B', B, G, D and E; and a loop which links ten strands.
Abstract:
PURPOSE: A pteridine derivative is provided which is obtained by culturing Streptomyces sp. DWJJ 839 and purification, and shows excellent inhibiting effect on HBV polymerase. Therefore, it can be effectively used as a therapeutic agent for B type hepatitis and formulated into injection, ointment, cream, liquid, etc. CONSTITUTION: Streptomyces sp. DWJJ 839(KFCC 10974) separated from soil is cultured, the culture solution thereof is heat treated and centrifuged to separate a supernatant, the concentrated supernatant is extracted in butanol, purified with column chromatography and separated with HPLC to produce a pteridine derivative of the formula(1-1). In formula, R5 and R6 are CH3; X1 and X2 are nitrogen; X3 and X4 are oxygen. The therapeutic agent for B type hepatitis contains a pteridine derivative of the formula(1) or a salt thereof. In formula, R1 and R2 are each H, C1-4 alkyl or lower alkoxy or can form a benzene ring by binding R1 and R2.
Abstract:
PURPOSE: Provided are a three-dimensional structure of TRAIL-sDR5 complex of a human derived apoptotic factor and a receptor thereof by X-ray crystallography and TRAIL(TNF Related Apoptosis Inducing Ligand) deletion mutant protein. CONSTITUTION: TRAIL-sDR5 complex is prepared by mixing TRAIL protein of SEQ ID NO:1 and sDR5 protein of SEQ ID NO:2. It can be crystallization method comprises the steps of: injecting a solution consisting of 16% of polyethyleneglycol 3000, 0.05M of sodium acetate(pH 4.5), 0.22 M of sodium acetate and 0.6M of sodium chloride into a well; mixing the precipitation solution and protein solution in a mixing ratio of 1:1 on the surface of a cover slip; and covering the well with the cover slip to crystallize the protein.
Abstract translation:目的:提供通过X射线晶体学和TRAIL(TNF相关凋亡诱导配体)缺失突变蛋白的人源性凋亡因子及其受体的TRAIL-sDR5复合物的三维结构。 构成:通过混合SEQ ID NO:1的TRAIL蛋白和SEQ ID NO:2的sDR5蛋白来制备TRAIL-sDR5复合物。 结晶方法包括以下步骤:将由16%聚乙二醇3000,0.05M乙酸钠(pH4.5),0.22M乙酸钠和0.6M氯化钠组成的溶液注入孔中; 将沉淀溶液和蛋白质溶液以1:1的混合比混合在盖板的表面上; 并用盖子覆盖井,使蛋白质结晶。