Abstract:
A method for screening an initial codon, which provides target protein level is provided to express an active protein at high speed and synthesize signal peptide having expression intensity by regulating the expression intensity of signal peptide. A method for screening an initial codon, which provides expression level of target protein comprises: a step of changing the target gene in one or more site of +2 to +13 codon in random; a step of isolating individual gene and amplifying the isolated gene through colony PCR; a step of performing cell-free protein synthesis; and a step of selecting a codon by irradiating.
Abstract:
The present invention relates to a gel matrix comprising a hydrogel holding microbeads, on which a first capturer conjugated with a target gene template and a second capturer conjugated with Ni-NTA (nitrilotriacetic acid) are combined, for synthesizing in situ protein, a method for manufacturing the gel matrix, protein in situ array according to the method, and a method for detecting or analyzing a protein using the same. The gel matrix according to the present invention allows one or multiple genes to synthesize proteins rapidly and also does not need complicated separation and purification processes. Additionally, the present invention enables a three-dimensional structure of the protein to be maintained, thereby being useful for detection and analysis of proteins including antigen-antibody reaction. Also, the present invention enables conjugation of various kinds of genes so that various proteins are synthesized at the same time, thereby being useful for researches and industries related to protein such as improvement of proteins, synthesis of biomolecules, molecular diagnosis, and synthetic biology.
Abstract:
PURPOSE: A Candida Antarctica-derived lipase B(CalB) protein variant is provided to increase enzyme activity and to be used in the industry. CONSTITUTION: A CalB protein variant is selected from a protein of amino acid sequences 2-8 in which 274-289th amino acid is partially substituted in Candida Antarctica-derived lipase B(CalB) protein. A gene encoding CalB protein variant sequence is denoted by sequence number selected from sequence numbers 10-16. A recombinant vector containing the gene is prepared by inserting the gen into pK7 vector. A transformed cell which produces CalB protein variant is obtained by transforming a host cell with the recombinant vector. The host cells are Pichia pastoris.
Abstract:
본 발명은 캔디다 안타르크티카( Candida antarctica ) 유래의 리파제 B(CalB) 단백질 변이체에 관한 것으로서, 서열번호 1의 아미노산 서열로 표시되는 CalB 단백질의 274 위치 내지 289 위치의 아미노산 중 일부가 치환된, 서열번호 2 내지 8의 아미노산 서열로 표시되는 단백질로 이루어진 군에서 선택되는 본 발명에 따른 CalB 단백질 변이체는, 기존의 CalB 단백질보다 최대 35 배 증가된 효소 활성을 가지므로 리파제를 이용하는 산업에 유용하게 사용될 수 있다. 생명공학, 효소, 변이, 단백질, 활성
Abstract:
A preparation method of a cell extract useful as catalyst for synthesis of a cell-free protein and the cell-free protein synthesis method by using the same extract are provided to improve economical efficiency and productivity of the cell-free protein synthesis by simplifying the preparation process of the cell extract through high-speed centrifugation. The preparation method of the cell extract useful as catalyst for synthesis of the cell-free protein comprises the steps of: destroying the cells cultured in the medium to prepare destroyed cell solution containing cellular organelles and factors required for synthesis of a desired protein; centrifuging the destroyed cell solution at 12,000 to 30,000Xg and collecting the supernatant to prepare the cell extract; and adding the cell extract into a reaction medium containing amino acid mixture, protein synthesis energy source, gene information source and buffer solution, wherein the cell is Escherichia coli, Bacillus subtilis, wheat germ, rice germ, barley germ, CHO(Chinese hamster ovary) cell, hybridoma cell or reticulocyte; the protein synthesis energy source is ATP(adenine triphosphate), CTP(cytidine triphosphate), GTP(guanosine triphosphate), TTP(thymine triphosphate) or UTP(uridine triphosphate); and the gene information source is DNA or mRNA(messenger RNA) encoding the target protein.