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    • 3. 发明申请
    • HOMOLOGY RETRIEVAL SYSTEM, HOMOLOGY RETRIEVAL APPARATUS, AND HOMOLOGY RETRIEVAL METHOD
    • 同位素检索系统,同源检索仪器和同步检索方法
    • US20100205204A1
    • 2010-08-12
    • US12529506
    • 2008-02-29
    • Takashi GojoboriKazuho IkeoToshitsugu Okayama
    • Takashi GojoboriKazuho IkeoToshitsugu Okayama
    • G06F17/30
    • G06F16/90344G16B30/00
    • A homology retrieval can be performed with higher accuracy than conventional technologies when comparing a query sequence with a target sequence, and retrieving a similar location in the target sequence. The sequence information of a query sequence and a genomic-scale target sequence is acquired, the acquired information is compressingly converted into a compressed query sequence and a compressed target sequence in each of which a homopolymer region including two or more consecutive identical bases is replaced with a single base of the bases, the two sequences are compared, and a refining search is performed for a compressed target partial sequence that matches the compressed query sequence in the compressed target sequence. For the refined compressed candidate sequence and the query sequence, based on the information on the number of consecutive identical bases in the each of the sequences before compression, the number of consecutive bases is compared between the two compressed sequences for each corresponding base, and the degree of similarity indicating homology of the candidate sequence with the query sequence is computed from a degree of match or a degree of mismatch in the number of consecutive bases. By ranking and selecting an arbitrary number of candidate sequences having relatively high homology with the query sequence from this degree of similarity, it is possible to avoid the influence of the number of consecutive identical bases in a homopolymer region, thereby performing a homology retrieval accurately.
    • 当将查询序列与目标序列进行比较时,可以以比传统技术更高的精度执行同源性检索,并且在目标序列中检索类似的位置。 获取查询序列和基因组大小目标序列的序列信息,将所获取的信息压缩转换为压缩查询序列,并将压缩的目标序列分别包含两个或多个连续相同的碱基的均聚物区域替换为 碱基的单个碱基,比较两个序列,并且对与压缩的目标序列中的压缩查询序列匹配的压缩目标部分序列进行精制搜索。 对于经精制的压缩候选序列和查询序列,基于压缩前每个序列中连续相同碱基数的信息,对于每个对应的碱基,在两个压缩序列之间比较连续碱基数, 从候选序列与查询序列的同源性的相似度的程度根据匹配度或连续基数的失配程度计算。 通过从该相似度排序和选择与查询序列具有相对高同源性的任意数量的候选序列,可以避免在均聚物区域中连续相同碱基的数量的影响,从而准确地进行同源性检索。
    • 5. 发明申请
    • Method for modifying a property of a protein
    • 改变蛋白质性质的方法
    • US20050233308A1
    • 2005-10-20
    • US10933280
    • 2004-09-03
    • Yosuke NishioEiichiro KimuraYoshihiro UsudaKazuho IkeoYoji NakamuraTakashi GojoboriYutaka KawarabayashiYumi HinoEiichi HoriJun Yamazaki
    • Yosuke NishioEiichiro KimuraYoshihiro UsudaKazuho IkeoYoji NakamuraTakashi GojoboriYutaka KawarabayashiYumi HinoEiichi HoriJun Yamazaki
    • C12N15/09C12N1/21C12N9/00C12N15/10C12P21/02C12Q1/00G01N33/48G01N33/50G06F19/00
    • C12N9/88C12N9/00C12N9/0016C12N9/1205C12N15/1034C12N15/1089
    • A property of a protein is modified by the following steps: (a) selecting 1000 or more genes from the genome of a first microorganism, and selecting 1000 or more genes from the genome of a second microorganism, wherein the genes from the first microorganism are orthologs to the genes from the second microorganism, and wherein the second microorganism is closely related to the first microorganism, but grows differently under at least one optimum growth condition when compared with the first microorganism, (b) comparing an amino acid sequence encoded by a gene from the first microorganism to an amino acid sequence encoded by the orthologous gene from the second microorganism, (c) detecting substitutions between the amino acid sequence encoded by a gene from the first microorganism and the amino acid sequence encoded by a gene from the second microorganism for each pair of orthologous genes, (d) compiling the detected amino acid substitutions for each amino acid substitution type, (e) calculating the frequency of each amino acid substitution type, wherein for each detected amino acid substitution type, a correction is made by subtracting the total number of substitution types which occur from the first microorganism to the second microorganism from the total number of the same substitution type which occurs in the reverse direction, or from the second microorganism to the first microorganism, (f) identifying and labelling the amino acid substitutions which occur at a high frequency as amino acid substitutions which are involved in said optimum growth condition, and (g) introducing one or more of the amino acid substitutions identified in (f) into the gene encoding the protein to modify a property of the protein.
    • 通过以下步骤修饰蛋白质的性质:(a)从第一微生物的基因组中选择1000个或更多个基因,并从第二微生物的基因组中选择1000个或更多个基因,其中来自第一个微生物的基因是 与第二微生物的基因直系同源,其中第二微生物与第一微生物密切相关,但与第一微生物相比,在至少一个最佳生长条件下生长不同,(b)比较由第一微生物编码的氨基酸序列 基因从第一微生物到由第二微生物的直系同源基因编码的氨基酸序列,(c)检测由第一微生物的基因编码的氨基酸序列与由第二微生物的基因编码的氨基酸序列之间的取代 每对直系同源基因的微生物,(d)编码每个氨基酸取代类型的检测到的氨基酸取代,(e)cal 规定每个氨基酸取代型的频率,其中对于每个检测到的氨基酸取代类型,通过从相同的取代类型的总数中减去从第一微生物发生到第二微生物的替代类型的总数来进行校正 (f)鉴定和标记高频发生的氨基酸取代作为参与所述最佳生长条件的氨基酸取代,和(g) 将(f)中鉴定的一个或多个氨基酸取代引入编码蛋白质的基因中以改变蛋白质的性质。