摘要:
A method for measuring a test substance whereby the test substance in a sample can be specifically measured without using an antibody against the test substance; an aptamer molecule used therefor; and a method for creating the aptamer are disclosed. An aptamer capable of hybridizing with an oligonucleotide when it is bound to a test substance, but is incapable of hybridizing with the oligonucleotide when it is not bound to the test substance, is utilized. The aptamer is brought into contact with a sample, and the aptamer bound to the test substance is brought into contact with an immobilized oligonucleotide which hybridizes with the aptamer, to bind the aptamer to a solid phase, followed by measurement of the aptamer immobilized on the solid phase.
摘要:
An aptamer having a G-quartet structure and being at least one selected from the group consisting of the following polynucleotides, the aptamer having a binding ability to an amyloid protein oligomer: (1) a polynucleotide comprising a base sequence represented by any one of SEQ ID NO:1 to SEQ ID NO:18; (2) a polynucleotide comprising a base sequence that includes at least four sets of at least two consecutive guanosine nucleotides and in which one or several bases has been deleted, substituted, or added in a base sequence represented by any one of SEQ ID NO:18; and (3) a polynucleotide that is a multimer including the polynucleotide of (1) or (2) as a structural unit.
摘要翻译:具有G-四重结构并且选自下列多核苷酸中的至少一种的适体,所述适配体具有与淀粉样蛋白寡聚物的结合能力:(1)包含由SEQ ID NO: SEQ ID NO:1至SEQ ID NO:18; (2)包含碱基序列的多核苷酸,其包含至少两组至少两个连续的鸟苷核苷酸,并且其中一个或几个碱基已被缺失,取代或加入到由SEQ ID NO: 18; 和(3)多核苷酸,其是包含作为结构单元的(1)或(2)的多核苷酸的多聚体。
摘要:
The present invention provides an aptamer that binds to prostate-specific antigen (PSA), the aptamer including: a preceding region having a random polynucleotide sequence consisting of from 1 to 10 nucleotides; a first region, at a 3′ end of the preceding region, consisting of nnnnCT wherein each n is independently selected from A, T, G and C; a second region consisting of nnCTTT wherein each n is independently selected from A, T, G and C, and at least one part of the second region is complementary to the first region; and a third region positioned between the first region and the second region and consisting of a random polynucleotide sequence having from 3 to 30 nucleotides.
摘要:
An aptamer-probe complex for detecting the presence of a target molecule is disclosed. The complex of the present invention contains an aptamer moiety which is able to bind to an indicator protein and change the properties of the indicator protein, and a probe moiety which is able to bind to a target molecule, wherein the aptamer moiety and the probe moiety are combined in such a manner that the binding mode between the aptamer moiety and the indicator protein changes when the probe moiety binds to the target molecule. A target molecule can be detected with combination of an aptamer which binds to a certain protein, and a probe which binds to the target molecule, utilizing the properties of that protein as an indicator.
摘要:
A method for measuring a test substance whereby the test substance in a sample can be specifically measured without using an antibody against the test substance; an aptamer molecule used therefor; and a method for creating the aptamer are disclosed. An aptamer capable of hybridizing with an oligonucleotide when it is bound to a test substance, but is incapable of hybridizing with the oligonucleotide when it is not bound to the test substance, is utilized. The aptamer is brought into contact with a sample, and the aptamer bound to the test substance is brought into contact with an immobilized oligonucleotide which hybridizes with the aptamer, to bind the aptamer to a solid phase, followed by measurement of the aptamer immobilized on the solid phase.
摘要:
An aptamer having a G-quartet structure and being at least one selected from the group consisting of the following polynucleotides, the aptamer having a binding ability to an amyloid protein oligomer: (1) a polynucleotide comprising a base sequence represented by any one of SEQ ID NO:1 to SEQ ID NO:18; (2) a polynucleotide comprising a base sequence that includes at least four sets of at least two consecutive guanosine nucleotides and in which one or several bases has been deleted, substituted, or added in a base sequence represented by any one of SEQ ID NO:18; and (3) a polynucleotide that is a multimer including the polynucleotide of (1) or (2) as a structural unit.
摘要翻译:具有G-四重结构并且选自下列多核苷酸中的至少一种的适体,所述适配体具有与淀粉样蛋白寡聚物的结合能力:(1)包含由SEQ ID NO: SEQ ID NO:1至SEQ ID NO:18; (2)包含碱基序列的多核苷酸,其包含至少两组至少两个连续的鸟苷核苷酸,并且其中一个或几个碱基已被缺失,取代或加入到由SEQ ID NO: 18; 和(3)多核苷酸,其是包含作为结构单元的(1)或(2)的多核苷酸的多聚体。
摘要:
Disclosed are a method for assaying a target substance in a sample and an apparatus for the method. The method can specifically assay the target substance in the sample without using any antibody against the target substance. The assaying method includes simultaneously or successively bringing a labeled aptamer, the target substance in the sample and a solid phase into contact together, and then measuring the label of the aptamer which has not been bound on the solid phase. The labeled aptamer has a property of binding to the target substance. The solid phase carries an oligonucleotide immobilized on it in an excess amount relative to the target substance. The oligonucleotide is hybridizable with the labeled aptamer when the labeled aptamer is in a state that it is not bound to the target substance, but is not hybridizable with the labeled aptamer when the labeled aptamer is in a state that it is bound to the target substance.
摘要:
In one form, a mutant fructosyl amino acid oxidase modified at an amino acid residue involved in a proton relay system is provided. The mutant fructosyl amino acid oxidase has reduced oxidase activity while substantially maintaining its dehydrogenase activity. Other forms include an assay device and assay method for measuring glycated protein. Still, other forms include unique methods, techniques, systems and devices involving a mutant fructosyl amino acid oxidase.
摘要:
The present invention relates to a labeling enzyme and a method of detecting and/or quantifying a target substance using this labeling enzyme. The present invention provides a labeling enzyme that catalyzes a reaction of gelling a substrate. By measuring changes in physical properties such as the film thickness and/or refractive index of a film produced by the gelling reaction catalyzed by the labeling enzyme of the present invention, it is possible to quickly and highly sensitively detect and/or quantify a target substance while minimizing the effects of coexisting substances.
摘要:
The present invention provides an aptamer that binds to prostate-specific antigen (PSA), the aptamer including: a preceding region having a random polynucleotide sequence consisting of from 1 to 10 nucleotides; a first region, at a 3′ end of the preceding region, consisting of nnnnCT wherein each n is independently selected from A, T, G and C; a second region consisting of nnCTTT wherein each n is independently selected from A, T, G and C, and at least one part of the second region is complementary to the first region; and a third region positioned between the first region and the second region and consisting of a random polynucleotide sequence having from 3 to 30 nucleotides.