Abstract: The present invention provides a novel nucleoside derivative or a salt thereof, a polynucleotide synthesis reagent, a method for producing a polynucleotide, a polynucleotide, and a method for producing a binding nucleic acid molecule. The nucleoside derivative or a salt thereof of the present invention is represented by the following chemical formula (1). In the chemical formula (1), Su is an atomic group having a sugar skeleton at a nucleoside residue or an atomic group having a sugar phosphate skeleton at a nucleotide residue, and may or may not have a protecting group, L1 and L2 are each independently a straight-chain or branched, saturated or unsaturated hydrocarbon group having 2 to 10 carbon atoms, X1 is an imino group (—NR1—), an ether group (—O—), or a thioether group (—S—), and R1 is a hydrogen atom or a straight-chain or branched, saturated or unsaturated hydrocarbon group having 2 to 10 carbon atoms.

Abstract: A nucleic acid detection kit including: (i) a first single-stranded circular DNA; (ii) a first oligonucleotide primer; (iii) a second single-stranded circular DNA; and (iv) a second oligonucleotide primer; wherein the first oligonucleotide primer is hound to a carrier through the 5?-end thereof, and the second oligonucleotide primer is bound, through the 5?-end thereof, to the carrier to which the first oligonucleotide primer is hound.

Abstract: A method of detecting a target molecule, the method comprising: forming a complex of a target molecule, a capture oligonucleotide, an oligonucleotide primer, and a single-stranded circular DNA; performing a nucleic acid amplification reaction by rolling circle amplification based on the formation of the complex; and detecting amplified nucleic acid; wherein the single-stranded circular DNA contains a first region, and a second region linked to the 3?-side of the first region, and preferably further contains a sequence complementary to a detection reagent-binding sequence; the primer contains a first aptamer sequence which binds to the target molecule, and a sequence which is linked to the 3?-side of the first aptamer sequence and is complementary to the first region of the single-stranded circular DNA; and the capture oligonucleotide contains a sequence complementary to the second region of the single-stranded circular DNA, and a second aptamer sequence which is linked to the 3?-side of the sequence complemen

Abstract: The present invention provides a novel molecule that can be used for detection of sIgA. The sIgA-binding nucleic acid molecule of the present invention is characterized in that it binds to secretory immunoglobulin A (sIgA) with a dissociation constant of 37.7 nM or less, and preferably includes a polynucleotide consisting of any of base sequences of SEQ ID NOs: 1 to 12 or a partial sequence thereof, for example. According to the sIgA-binding nucleic acid molecule of the present invention, it is possible to detect sIgA in saliva.

Abstract: A method for detecting a gene mutation(s), the method comprising the steps of: hybridizing a single-stranded circular DNA and a primer with a target polynucleotide containing a first region and a second region adjacent to the 3?-side of the first region and containing a mutation; performing a nucleic acid amplification reaction by rolling circle amplification based on formation of a complex of the target polynucleotide, the primer, and the single-stranded circular DNA; and detecting amplified nucleic acid with a detection reagent. In this method, the single-stranded circular DNA contains a sequence complementary to the first region of the target polynucleotide, a primer-binding sequence adjacent to the 5?-side thereof, and preferably a sequence complementary to a detection reagent-binding sequence.

Abstract: The present invention provides a novel nucleoside derivative or a salt thereof, a polynucleotide synthesis reagent, a method for producing a polynucleotide, a polynucleotide, and a method for producing a binding nucleic acid molecule. The nucleoside derivative or a salt thereof of the present invention is represented by the following chemical formula (1): where in the chemical formula (1), Su is an atomic group having a sugar skeleton at a nucleoside residue or an atomic group having a sugar phosphate skeleton at a nucleotide residue, and may or may not have a protecting group, L1 and L2 are each independently a straight-chain or branched, saturated or unsaturated hydrocarbon group having 2 to 10 carbon atoms, X1 and X2 are each independently an imino group (—NR1—), an ether group (—O—), or a thioether group (—S—), and the R1 is a hydrogen atom or a straight-chain or branched, saturated or unsaturated hydrocarbon group having 2 to 10 carbon atoms.

Abstract: The present invention provides a novel nucleic acid molecule that can be used for detection of ?-amylase. The ?-amylase-binding nucleic acid molecule of the present invention is characterized in that it binds to ?-amylase with a dissociation constant of 17 nM or less, and preferably includes a polynucleotide consisting of any of base sequences of SEQ ID NOs: 1 to 22, for example. According to the nucleic acid molecule of the present invention, it is possible to detect ?-amylase in saliva.

Abstract: The present invention provides a novel nucleoside derivative or a salt thereof, a polynucleotide synthesis reagent, a method for producing a polynucleotide, a polynucleotide, and a method for producing a binding nucleic acid molecule. The nucleoside derivative or a salt thereof of the present invention is represented by the following chemical formula (1): where in the chemical formula (1), Su is an atomic group having a sugar skeleton at a nucleoside residue or an atomic group having a sugar phosphate skeleton at a nucleotide residue, and may or may not have a protecting group, L1 and L2 are each independently a straight-chain or branched, saturated or unsaturated hydrocarbon group having 2 to 10 carbon atoms, X1 and X2 are each independently an imino group (—NR1—), an ether group (—O—), or a thioether group (—S—), and the R1 is a hydrogen atom or a straight-chain or branched, saturated or unsaturated hydrocarbon group having 2 to 10 carbon atoms.

Abstract: The present invention provides a novel nucleoside derivative or a salt thereof, a polynucleotide synthesis reagent, a method for producing a polynucleotide, a polynucleotide, and a method for producing a binding nucleic acid molecule. The nucleoside derivative or a salt thereof of the present invention is represented by the following chemical formula (1): where in the chemical formula (1), Su is an atomic group having a sugar skeleton at a nucleoside residue or an atomic group having a sugar phosphate skeleton at a nucleotide residue, and may or may not have a protecting group, L1 and L2 are each independently a straight-chain or branched, saturated or unsaturated hydrocarbon group having 2 to 10 carbon atoms, X1 and X2 are each independently an imino group (—NR1—), an ether group (—O—), or a thioether group (—S—), and the R1 is a hydrogen atom or a straight-chain or branched, saturated or unsaturated hydrocarbon group having 2 to 10 carbon atoms.

Abstract: The present invention provides a novel nucleoside derivative or a salt thereof, a polynucleotide synthesis reagent, a method for producing a polynucleotide, a polynucleotide, and a method for producing a binding nucleic acid molecule. The nucleoside derivative or a salt thereof of the present invention is represented by the following chemical formula (1): where in the chemical formula (1), Su is an atomic group having a sugar skeleton at a nucleoside residue or an atomic group having a sugar phosphate skeleton at a nucleotide residue, and may or may not have a protecting group, L1 and L2 are each independently a straight-chain or branched, saturated or unsaturated hydrocarbon group having 2 to 10 carbon atoms, X1 and X2 are each independently an imino group (—NR1—), an ether group (—O—), or a thioether group (—S—), and the R1 is a hydrogen atom or a straight-chain or branched, saturated or unsaturated hydrocarbon group having 2 to 10 carbon atoms.

Abstract: An RNA detection kit comprising: (i) a single-stranded circular DNA template containing: a sequence of 10 to 30 bases complementary to a first portion of a target RNA; a primer-binding sequence of 7 to 8 bases adjacent to 5?-side thereof; and a sequence complementary to a detection reagent-binding sequence such as a guanine quadruplex-forming sequence; (ii) an oligonucleotide primer containing: a sequence of 8 to 15 bases complementary to a second portion adjacent to the 3?-side of the first portion of the target RNA; and a sequence of 7 to 8 bases adjacent to 3?-side thereof and complementary to the primer-binding sequence of the single-stranded circular DNA template; and (iii) a detection reagent such as a guanine quadruplex-binding reagent; is provided.

Abstract: A method of detecting a target molecule, the method comprising: forming a complex of a target molecule, a capture oligonucleotide, an oligonucleotide primer, and a single-stranded circular DNA; performing a nucleic acid amplification reaction by rolling circle amplification based on the formation of the complex; and detecting amplified nucleic acid; wherein the single-stranded circular DNA contains a first region, and a second region linked to the 3?-side of the first region, and preferably further contains a sequence complementary to a detection reagent-binding sequence; the primer contains a first aptamer sequence which binds to the target molecule, and a sequence which is linked to the 3?-side of the first aptamer sequence and is complementary to the first region of the single-stranded circular DNA; and the capture oligonucleotide contains a sequence complementary to the second region of the single-stranded circular DNA, and a second aptamer sequence which is linked to the 3?-side of the sequence complemen

Abstract: The present invention provides a novel nucleoside derivative or a salt thereof, a polynucleotide synthesis reagent, a method for producing a polynucleotide, a polynucleotide, and a method for producing a binding nucleic acid molecule. The nucleoside derivative or a salt thereof of the present invention is represented by the following chemical formula (1). In the chemical formula (1), Su is an atomic group having a sugar skeleton at a nucleoside residue or an atomic group having a sugar phosphate skeleton at a nucleotide residue, and may or may not have a protecting group, L1 and L2 are each independently a straight-chain or branched, saturated or unsaturated hydrocarbon group having 2 to 10 carbon atoms, X1 is an imino group (—NR1—), an ether group (—O—), or a thioether group (—S—), and R1 is a hydrogen atom or a straight-chain or branched, saturated or unsaturated hydrocarbon group having 2 to 10 carbon atoms.

Abstract: Disclosed is a nucleoside derivative of formulae (I-1) or a salt thereof: in which R1, R2, R3, R5, A1 to A3, B, X, Y, and k are described herein. Also provided are a 5?-phosphate ester and a 3?-phosphoramidite derivative of the nucleoside derivative and substrate solutions thereof. A polynucleotide is produced using the 5?-phosphate ester or 3?-phosphoramidite derivative of the nucleoside derivative. A library of the produced polynucleotide is used in a method of selecting a nucleic acid aptamer. Further provided is a vesicular endothelial growth factor binding agent of formula (i).

Abstract: The present invention provides a novel nucleoside derivative or a salt thereof, a polynucleotide synthesis reagent, a method for producing a polynucleotide, a polynucleotide, and a method for producing a binding nucleic acid molecule. The nucleoside derivative or a salt thereof of the present invention is represented by the following chemical formula (1): where in the chemical formula (1), Su is an atomic group having a sugar skeleton at a nucleoside residue or an atomic group having a sugar phosphate skeleton at a nucleotide residue, and may or may not have a protecting group, L1 and L2 are each independently a straight-chain or branched, saturated or unsaturated hydrocarbon group having 2 to 10 carbon atoms, X1 and X2 are each independently an imino group (—NR1—), an ether group (—O—), or a thioether group (—S—), and the R1 is a hydrogen atom or a straight-chain or branched, saturated or unsaturated hydrocarbon group having 2 to 10 carbon atoms.

Abstract: The present invention provides a novel molecule that can be used for detection of sIgA. The sIgA-binding nucleic acid molecule of the present invention is characterized in that it binds to secretory immunoglobulin A (sIgA) with a dissociation constant of 37.7 nM or less, and preferably includes a polynucleotide consisting of any of base sequences of SEQ ID NOs: 1 to 12 or a partial sequence thereof, for example. According to the sIgA-binding nucleic acid molecule of the present invention, it is possible to detect sIgA in saliva.

Abstract: The present invention provides a novel nucleoside derivative or a salt thereof, a polynucleotide synthesis reagent, a method for producing a polynucleotide, a polynucleotide, and a method for producing a binding nucleic acid molecule. The nucleoside derivative or a salt thereof of the present invention is represented by the following chemical formula (1): where in the chemical formula (1), Su is an atomic group having a sugar skeleton at a nucleoside residue or an atomic group having a sugar phosphate skeleton at a nucleotide residue, and may or may not have a protecting group, L1 and L2 are each independently a straight-chain or branched, saturated or unsaturated hydrocarbon group having 2 to 10 carbon atoms, X1 and X2 are each independently an imino group (—NR1—), an ether group (—O—), or a thioether group (—S—), and the R1 is a hydrogen atom or a straight-chain or branched, saturated or unsaturated hydrocarbon group having 2 to 10 carbon atoms.

Abstract: An RNA detection kit comprising: (i) a single-stranded circular DNA template containing: a sequence of 10 to 30 bases complementary to a first portion of a target RNA; a primer-binding sequence of 7 to 8 bases adjacent to 5?-side thereof; and a sequence complementary to a detection reagent-binding sequence such as a guanine quadruplex-forming sequence; (ii) an oligonucleotide primer containing: a sequence of 8 to 15 bases complementary to a second portion adjacent to the 3?-side of the first portion of the target RNA; and a sequence of 7 to 8 bases adjacent to 3?-side thereof and complementary to the primer-binding sequence of the single-stranded circular DNA template; and (iii) a detection reagent such as a guanine quadruplex-binding reagent; is provided.

Abstract: The present invention provides a novel nucleic acid molecule that can be used for detection of ?-amylase. The ?-amylase-binding nucleic acid molecule of the present invention is characterized in that it binds to ?-amylase with a dissociation constant of 17 nM or less, and preferably includes a polynucleotide consisting of any of base sequences of SEQ ID NOs: 1 to 22, for example. According to the nucleic acid molecule of the present invention, it is possible to detect ?-amylase in saliva.

Abstract: A nucleoside derivative represented by any of the following formulae (I-1) to (I-6) or a salt thereof: in the formulae (I-1) to (I-6), R1 to R5, A1 to A3, B, X, Y, and k represent the meanings as described in claim 1.