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    • 55. 发明授权
    • 고농도의 아스타산틴을 생산하는 돌연변이 균주 파피아로도지마 및 이 균주의 발효 배양 방법
    • 고농도의아스타산틴을생산하는돌연변이균주파피아로도지마및이균주의발효배양방
    • KR100431359B1
    • 2004-05-14
    • KR1020010001721
    • 2001-01-12
    • 해태제과식품주식회사한국생명공학연구원
    • 한지영이승재정명교정광호최의성손정훈심동섭
    • C12N1/16
    • PURPOSE: Provided is a method for separating mutant strain, Phaffia rhodozyma (KCTC-0920B) which generates astaxanthin in a high yield in a short period of time without being degenerated into a wild type during continuous cultivations. CONSTITUTION: The method for separating mutant strain, Phaffia rhodozyma (KCTC-0920B) comprises the steps of: i) cultivating Phaffia rhodozyma (ATCC-96594) in YM broth and treating the strain with 1-methyl-3-nitro-1-nitrosoguanidine (NTG) to kill 98% of yeast; ii) spreading the remaining yeast on YM medium for cultivation and selecting colonies which are growing faster with red color than the original strain; iii) repeating these processes several times and then, cultivating selected bacteria in YM broth for 4-6 days; and iv) measuring the amount of mycobiont and carotenoid and selecting the strain which produces carotenoid in a high yield.
    • 发明目的:提供一种在连续培养过程中在短时间内以高收率生产虾青素的突变株红发夫酵母(KFTC-0920B)而不退化为野生型的方法。 构成:分离突变株红发夫酵母(KFTC-0920B)的方法包括以下步骤:i)在YM肉汤中培养红发夫酵母(ATCC-96594),并用1-甲基-3-硝基-1-亚硝基胍 (NTG)杀死98%的酵母; ii)将剩余的酵母铺在YM培养基上进行培养,并选择比原始菌株红色增长更快的菌落; iii)重复这些过程若干次,然后在YM肉汤中培养选择的细菌4-6天; 和iv)测量mycobiont和类胡萝卜素的量并选择以高产率产生类胡萝卜素的菌株。
    • 56. 发明公开
    • 효모 표면 발현 벡터를 이용하여 변이 리파제를스크리닝하는 방법 및 신규 변이 리파제
    • 使用YEAST表面显示向量筛选突变的脂肪的方法
    • KR1020040024074A
    • 2004-03-20
    • KR1020020055575
    • 2002-09-13
    • 한국생명공학연구원
    • 최의성손정훈김소영
    • C12Q1/68
    • C40B40/02C12N9/18C12N15/1037
    • PURPOSE: A method for screening mutated lipase using a yeast surface display vector is provided, thereby easily preparing a transformant producing mutated lipase having improved enzymatic activity, and easily recovering the mutated lipase because the mutated lipase is fixed on the surface of the transformed cell. CONSTITUTION: A method for screening of mutated lipase using a yeast surface display vector comprises the steps of: (1) cloning a lipase gene into a yeast surface display vector; (2) carrying out mutation-inducing PCR using the lipase gene in the yeast surface display vector as a template to produce a mutated lipase gene; (3) transforming a host cell with the mutated gene and the yeast surface display vector; and (4) determining the activity of the mutated lipase displayed on the surface of the transformant to screen a mutated lipase having improved enzymatic activity, wherein the lipase gene is Candida antarctica lipase B gene having the nucleotide sequence set forth in SEQ ID NO: 14; and the mutated gene is Candida antarctica lipase B gene of SEQ ID NO: 14 in which leucine at amino acid position 219 and/or 278 is substituted by any other amino acid.
    • 目的:提供使用酵母表面显示载体筛选突变脂肪酶的方法,从而容易地制备产生具有改善的酶活性的突变脂肪酶的转化体,并且容易地回收突变的脂肪酶,因为突变的脂肪酶固定在转化细胞的表面上。 构成:使用酵母表面显示载体筛选突变脂肪酶的方法包括以下步骤:(1)将脂肪酶基因克隆到酵母表面显示载体中; (2)使用酵母表面显示载体中的脂肪酶基因进行突变诱导PCR作为模板以产生突变的脂肪酶基因; (3)用突变基因和酵母表面显示载体转化宿主细胞; (4)测定显示在转化体表面上的突变脂肪酶的活性,筛选具有改善的酶活性的突变脂肪酶,其中所述脂肪酶基因是具有SEQ ID NO:14所示核苷酸序列的南极假丝酵母 ; 并且突变基因是SEQ ID NO:14的假丝酵母属南极脂肪酶B基因,其中氨基酸位置219和/或278的亮氨酸被任何其它氨基酸取代。
    • 59. 发明公开
    • 한세눌라 폴리모르파 유전자 및 이들 유전자가 결핍된 균주
    • HANSENULA POLYMORPHA基因和相似基因的菌株缺失
    • KR1020020063146A
    • 2002-08-01
    • KR1020020032934
    • 2002-06-12
    • 한국생명공학연구원
    • 최의성이상기손정훈강현아배정훈
    • C12N15/57
    • C12N9/60C07K14/485C12N15/815
    • PURPOSE: A Hansenula polymorpha gene and a strain lacking of the same gene are provided, thereby a foreign protein having decreased carboxy terminal digestion can be produced from the strain lacking of the Hansenula polymorpha gene. CONSTITUTION: A gene KEX1 having the nucleotide sequence of SEQ ID NO: 3 and encoding carboxypeptidase alpha derived from Hansenula polymorpha DL1(ATCC 26012). A recombinant vector pKUZ is constructed by inserting Hansenula polymorpha URA3 gene pop out cassette into a plasmid pKH3.9 containing the gene KEX1 having the nucleotide sequence of SEQ ID NO: 3. The Hansenula polymorpha DL1 carboxypeptidase alpha mutant strain is produced by transforming with the recombinant vector pKUZ. A foreign protein is expressed by inserting the foreign gene into the transformed mutant strain and culturing the strain in a methanol medium, wherein the foreign protein is hEGF.
    • 目的:提供汉逊酵母多形汉逊酵母基因和缺乏相同基因的菌株,从而可以从缺少汉逊酵母多形汉逊酵母基因的菌株中产生具有降低的羧基末端消化的外源蛋白质。 构成:具有SEQ ID NO:3的核苷酸序列并编码源自多形汉逊酵母DL1(ATCC 26012)的羧肽酶α的基因KEX1。 通过将多形汉逊酵母URA3基因突变盒插入到含有具有SEQ ID NO:3的核苷酸序列的基因KEX1的质粒pKH3.9中构建重组载体pKUZ。多形汉逊酵母DL1羧肽酶α突变株通过用 重组载体pKUZ。 通过将外源基因插入转化的突变菌株中并在甲醇培养基中培养菌株来表达外源蛋白质,其中外源蛋白质是hEGF。
    • 60. 发明公开
    • 파피아로도지마형질전환용벡터및그형질전환방법
    • PHAFFIA RHODOZYMA的转化载体及其转化方法
    • KR1020000028349A
    • 2000-05-25
    • KR1019980046547
    • 1998-10-31
    • 한국생명공학연구원
    • 최의성이상기손정훈박수동이윤형이승재장재권최석근손영록
    • C12N15/31C12N15/79
    • C12N15/815C07K14/39
    • PURPOSE: A vector having targeting gene and cycloheximide resistance gene is constructed for stable transformation of Phaffia rhodozyma. Electroporation method is applied to transform Phaffia rhodozyma. CONSTITUTION: Part of ribosome protein L41 gene is amplified from genome DNA of Phaffia rhodozyma and used to screen whole gene of L41 from genome library. RT-PCR is performed to clone whole L41 gene based on genomic sequence. Cycloheximide resistance is introduced by site directed mutagenesis of L41 gene in particular, proline 56 is substituted into glutamine by mutagenesis. Ribosome gene including 18S region and non-transcription sequence (NTS) is cloned from mini library. Vector pTPLR1 is constructed by ligation of 0.73kb ribosome DNA and 3.7kb L14 DNA. Vector pTPLR2 having opposite direction of L14 gene expression is also constructed. The conditions of electroporation are 0.8-1.2KV, 400-800 ohm, and 25-50 micro Farad. Southern blotting analysis reveals that the transformants are stable in cycloheximide free medium during serial passage culture for several generation.
    • 目的:构建了具有靶向基因和放线菌酮抗性基因的载体,用于稳定转化红发夫酵母。 电穿孔法用于转化红发夫酵母。 构成:从酵母红酵母的基因组DNA扩增核糖体蛋白L41基因的一部分,用于从基因组文库中筛选出L41的全基因。 基于基因组序列进行RT-PCR克隆整个L41基因。 特别是通过L41基因的定点诱变引入环己酰亚胺抗性,通过诱变将脯氨酸56代替为谷氨酰胺。 包括18S区域和非转录序列(NTS)的核糖体基因从小型文库克隆。 载体pTPLR1通过连接0.73kb核糖体DNA和3.7kb L14 DNA构建。 还构建了具有相反方向的L14基因表达的载体pTPLR2。 电穿孔条件为0.8-1.2KV,400-800欧姆和25-50微法拉。 Southern印迹分析显示,在连续传代培养中,转化体在无放线菌酮游离培养基中稳定数代。