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    • 21. 发明授权
    • Using thymidine analogs to improve replication in an expanded genetic alphabet
    • 使用胸苷类似物改善扩增的基因字母表中的复制
    • US07794936B1
    • 2010-09-14
    • US11541295
    • 2006-09-29
    • Steven Albert BennerAlbert Michael Sismour
    • Steven Albert BennerAlbert Michael Sismour
    • C12Q1/68
    • C12Q1/6844C12Q2525/117C12Q2521/101
    • This invention relates to nucleoside, nucleotide, and oligonucleotide analogs that incorporate non-standard nucleobase analogs, those that present a pattern of hydrogen bonds to a paired nucleobase analog in a complementary strand that is different from the pattern presented by adenine, guanine, cytosine, and thymine. Most specifically, this invention discloses and claims processes for amplifying nucleic acid analogs containing non-standard nucleobases using polymerase chain reactions, and combinations of non-standard nucleobases, analogs of standard nucleotides, and enzymes that perform this amplification. Most specifically, this invention is for the use of 2-thiothymidine triphosphate (2-thioTTP) instead of thymidine triphosphate in a six letter polymerase chain reaction that includes 2′-deoxyadenosine triphosphate, 2′-deoxyguanosine triphosphate, 2′-deoxycytidine triphosphate, 2′-deoxy-iso-guanosine triphosphate, and 2′-deoxy-iso-cytidine triphosphate, as well as their forms that contain side chain modifications. Because of the size and hydrogen bonding properties of the sulfur unit in 2-thioT, 2-thioT does not mispair effectively with the minor tautomer of isoG. This permits the PCR amplification of a six letter artificially expanded genetic information system, we examined the relative rates of misincorporation of 2-thioTTP and TTP opposite isoG using affinity electrophoresis with a fidelity-per-round of ca. 98%. The analogous PCR employing TTP has a fidelity-per-round of only ca. 93%. Therefore, this invention represents the first example of a six letter artificial genetic system that is amplifiable by a thermostable polymerase, and capable of Darwinian evolution.
    • 本发明涉及包含非标准核碱基类似物的核苷,核苷酸和寡核苷酸类似物,那些与互补链中的配对核碱基类似物呈现氢键图案的核苷酸,核苷酸和寡核苷酸类似物不同于腺嘌呤,鸟嘌呤,胞嘧啶, 和胸腺嘧啶。 最具体地,本发明公开并要求使用聚合酶链反应扩增含有非标准核碱基的核酸类似物的方法,以及非标准核碱基,标准核苷酸的类似物和进行该扩增的酶的组合。 最具体地,本发明是在六字母聚合酶链反应中使用二硫代胸苷三磷酸(2-硫代TTP)代替三磷酸胸苷,其包括二脱氧腺苷三磷酸,2'-脱氧鸟苷酸三磷酸,2'-脱氧胞苷三磷酸, 2'-脱氧异鸟苷三磷酸和2'-脱氧 - 异胞苷三磷酸,以及其含有侧链修饰的形式。 由于2-硫代噻硫单元的大小和氢键性质,2-硫代不能有效地与异构体的次互变异构体失配。 这允许PCR扩增六个字母的人工扩增的遗传信息系统,我们使用亲和力电泳,以每秒保真度为单位检查了2-thioTTP和TTP与isoG的错配合相对速率。 98%。 使用TTP的类似的PCR具有仅保留每一倍的保真度。 93%。 因此,本发明代表了可通过热稳定聚合酶扩增并具有达尔文进化的六字母人造遗传系统的第一个例子。
    • 24. 发明授权
    • Processes replacing standard nucleotides by non-standard nucleotides and non-standard nucleotides by standard nucleotides in DNA
    • 用DNA中的标准核苷酸替换非标准核苷酸和非标准核苷酸的方法
    • US09334534B1
    • 2016-05-10
    • US12653613
    • 2009-12-16
    • Steven Albert Benner
    • Steven Albert Benner
    • C12P19/34C12Q1/68C07H21/04
    • C12P19/34C07H21/04C12Q1/6844C12Q1/6869C12Q2525/117C12Q2521/101
    • This invention concerns non-standard nucleotides that can form non-standard Watson-Crick nucleobase pairs having geometries similar to the geometries of standard nucleotide pairs, but that are joined by a non-standard hydrogen bonding schemes. Disclosed are processes that yield oligonucleotides that are semi-complementary to a standard oligonucleotide, where the region of semi-complementarity pairs one or more standard nucleotides with a non-standard nucleotide, or vice versa. Duplexes formed from two semi-complementary oligonucleotides are also inventions disclosed. The processes extending a primer annealed to an oligonucleotide template with a polymerase in the presence of a non-standard nucleoside triphosphate and a mixture of standard nucleoside triphosphates, where the non-standard triphosphate is incorporated opposite the standard triphosphate because it has available a protonated or deprotonated form, or a minor tautomeric form, that is complementary in the Watson-Crick sense to the standard nucleotide, even though in its normal form (neither protonated or deprotonated, or as its major tautomer) it is complementary in the Watson-Crick sense to a non-standard nucleobase. Also disclosed are processes that exploit an intermediary nucleoside, one whose nucleobase is partially complementary to both a standard nucleotide and a non-standard nucleotide at two of their three hydrogen bonding units. Also disclosed are intermediary nucleotides whose hydrogen bonding patterns are changed by chemical reagents. Also disclosed are the vice versa processes and process pairs where standard nucleotides are incorporated opposite non-standard nucleotides, yielding clonable products that can be sequenced to determine where non-standard nucleotides were present in the parent template oligonucleotide.
    • 本发明涉及可以形成具有类似于标准核苷酸对的几何形状但具有非标准氢键合方案的几何形式的非标准沃森 - 克里克核碱基对的非标准核苷酸。 公开了产生与标准寡核苷酸半互补的寡核苷酸的方法,其中半互补区域与一个或多个具有非标准核苷酸的标准核苷酸对应,反之亦然。 由两个半互补寡核苷酸形成的双链体也是公开的发明。 在非标准核苷三磷酸盐和标准核苷三磷酸盐的混合物存在下,使用聚合酶将引物退火至寡核苷酸模板的方法,其中非标准三磷酸盐与标准三磷酸盐相结合,因为其可用于质子化或 即使在正常形式(既不质子化还是去质子化,或作为其主要互变异构体),它在沃森 - 克里克意思上与沃森 - 克里克意识相互补充,就是在沃森 - 克里克的意义上是互补的 到非标准核碱基。 还公开了利用中间核苷的方法,其核碱基与其三个氢键单元中的两个处的标准核苷酸和非标准核苷酸部分互补。 还公开了通过化学试剂改变其氢键图案的中间核苷酸。 还公开了相反的过程和方法对,其中标准核苷酸与非标准核苷酸相结合,产生可测序的可克隆产物以确定亲本模板寡核苷酸中存在非标准核苷酸的位置。
    • 25. 发明授权
    • Dynamic and combinatorial synthesis of polymerase primers
    • 聚合酶引物的动态和组合合成
    • US08153361B1
    • 2012-04-10
    • US11702327
    • 2007-02-05
    • Steven Albert Benner
    • Steven Albert Benner
    • C12Q1/68C12P19/34C07H21/00
    • C12P19/34
    • This invention relates to the field of nucleic acid chemistry, more specifically to compositions of matter that are nucleic acid analogs, and processes that use them. Still more specifically, these compositions comprise two fragments of DNA-like molecules, each having one or more ends modified to carry a reactive group, where the reactive group on one fragment can form a transient covalent bond with the reactive group on the other under conditions of dynamic equilibrium to form a composite, where the composite can then bind to a target oligonucleotide, such as a DNA or RNA molecule. Most specifically, once the transient covalent bond forms, the composite serves as a primer for a template-directed polymerization using a DNA polymerase, an RNA polymerase, or a reverse transcriptase. Once incorporated, the epimerization causes the base pair to be destabilized, the duplex containing the epimerized nucleoside to likewise be destabilized, and the double strand to then disassociate. This leaves the template available to template the synthesis of another complementary oligonucleotide containing the epimerizing base.
    • 本发明涉及核酸化学领域,更具体地涉及作为核酸类似物的物质组合物以及使用它们的方法。 更具体地,这些组合物包含两个DNA样分子的片段,每个片段具有一个或多个末端被修饰以携带反应性基团,其中一个片段上的反应性基团可以在条件下与另一个片段上的反应性基团形成瞬时共价键 的动态平衡以形成复合物,其中复合物然后可以结合靶DNA,例如DNA或RNA分子。 最具体地,一旦形成瞬时共价键,该复合物用作使用DNA聚合酶,RNA聚合酶或逆转录酶的模板定向聚合的引物。 一旦并入,差向异构化导致碱基对失去稳定,含有差向异构化核苷的双链体同样地不稳定,然后双链脱离。 这使模板可用于模拟含有差向异构化碱基的另一互补寡核苷酸的合成。
    • 26. 发明申请
    • POLYMERASE INCORPORATION OF NON-STANDARD NUCLEOTIDES
    • 聚合物纳入非标准核素
    • US20110124053A1
    • 2011-05-26
    • US12999138
    • 2009-06-16
    • Steven Albert BennerFei ChenZunyi Yang
    • Steven Albert BennerFei ChenZunyi Yang
    • C12P19/34
    • C12Q1/6853C12P19/34C12Q1/686C12Q2521/101C12Q2525/117C12Q2525/191
    • The disclosed invention teaches processes to amplify oligonucleotides by contacting templates and primers with DNA polymerases and triphosphates of non-standard nucleotides, which form nucleobase pairs fitting the standard Watson-Crick geometry, but joined by hydrogen bonding patterns different from those that join standard A:T and G:C pairs. Thus, this invention relates to nucleotide analogs and their derivatives that, when incorporated into DNA and RNA, expand the number of replicatable nucleotides beyond the four found in standard DNA and RNA. The invention further relates to polymerases that incorporate those non-standard nucleotide analogs into oligonucleotide products using the corresponding triphosphate derivatives, and more specifically, polymerases and non-standard nucleoside triphosphates that support the polymerase chain reaction (PCR), including PCR where the products contain more than one non-standard nucleotide unit. Examples are provides that show this process using 6-amino-5-nitro-3-(1′-beta-D-2′-deoxyribofuranosyl)-2(1H)-pyridone to implement the non-standard “small” donor-donor-acceptor (pyDDA) hydrogen bonding pattern, and 2-amino-8-(r-beta-D-2′-deoxyribofuranosyl)-imidazo[1,2-α]-1,3,5-triazin-4(8H)-one to implement the “large” acceptor-acceptor-donor (puADD) pattern.
    • 所公开的发明教导了通过使模板和引物与DNA聚合酶和非标准核苷酸的三磷酸接触来扩增寡核苷酸的过程,其形成适合标准Watson-Crick几何形状的核碱基对,但是通过与加入标准A: T和G:C对。 因此,本发明涉及核苷酸类似物及其衍生物,其在掺入DNA和RNA时扩大超出标准DNA和RNA中发现的四种可重复核苷酸的数量。 本发明还涉及使用相应的三磷酸衍生物,更具体地,支持聚合酶链式反应(PCR)的聚合酶和非标准核苷三磷酸(包括产物含有的PCR)的寡核苷酸产物,将这些非标准核苷酸类似物结合到聚合酶中的聚合酶 多个非标准核苷酸单位。 提供了使用6-氨基-5-硝基-3-(1'-β-D-2'-脱氧三呋喃糖基)-2(1H) - 吡啶酮来实施非标准“小”供体 - 供体 - 受体(pyDDA)氢键图案和2-氨基-8-(r-β-D-2'-脱氧三呋喃糖基) - 咪唑并[1,2-α] -1,3,5-三嗪-4(8H) - 实施“大”受体 - 受体 - 供体(puADD)模式。
    • 27. 发明授权
    • Application of protein structure predictions
    • US06377893B1
    • 2002-04-23
    • US08914375
    • 1997-08-19
    • Steven Albert Benner
    • Steven Albert Benner
    • G06G748
    • G01N33/6803
    • A method for making a model for the folded structure of a set of proteins from an evolutionary analysis of a set of aligned homologous protein sequences was claimed in Ser. No. 07/857,224. The instant application concerns methods for using these models. The first method is used to confirm or deny a hypothesis that two proteins are homologous, and is comprised of comparing a predicted structure model for one family of proteins with a predicted structure model for a second family of proteins, or an experimental structure for the second family, and deducing the presence or absence of homology based on the presence or absence of structural similarity flanking key residue motifs in the polypeptide sequence. The second method identifies mutations during the divergent evolution of a protein sequence that are potentially adaptive by identifying episodes during the divergent evolution of a family of proteins where there is a high absolute rate of amino acid substitution, or a high ratio of non-silent substitutions to non-silent substitutions. Amino acids that are changing during this episode are likely to be adaptive. The third is a method for identifying specific in vitro properties of the protein that are likely to play a physiological role in vivo in an organism. This methods involves synthesizing in the laboratory proteins having the reconstructed amino acid sequences of a protein before and after a period of rapid sequence evolution that characterizes adaptive substitution, measuring the in vitro properties of the protein before the episode of rapid sequence evolution, and then measuring the in vivo properties of the protein after the episode of rapid sequence evolution. The in vitro behaviors that remained unchanged through this episode are not likely to have adaptive significance physiologically. The in vitro behaviors that changed through this episode are likely to have adaptive significance physiologically. The fourth concerns method for organizing genome sized sequence databases.