Enzyme triggered redox altering chemical elimination (E-TRACE) immunoassay
First Claim
1. A method for detecting a target analyte in a test sample, said method comprising:
- (a) providing a solid support comprising an electrode comprising;
(i) a self-assembled monolayer (SAM),(ii) a covalently attached electroactive active moiety (EAM) comprising a transition metal complex comprising a self-immolative moiety and a peroxide sensitive moiety (PSM), wherein said EAM has a first E0, and(b) contacting said target analyte and said solid support under conditions wherein said target analyte reacts with a peroxide generating enzyme to generate peroxide and said self-immolative moiety is removed such that said EAM has a second E0, wherein said peroxide generating enzyme is immobilized or physisorbed onto the solid support, the electrode, or SAM, or wherein said peroxide generating enzyme is in a solution in contact with the electrode; and
(c) detecting said second E0 as an indication of the presence of said target analyte.
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Accused Products
Abstract
Described are methods for detecting a target analyte in a test sample by providing a solid support comprising an electrode comprising: (i) a self-assembled monolayer (SAM), (ii) a covalently attached electroactive active moiety (EAM) comprising a transition metal complex comprising a self-immolative moiety and a peroxide sensitive moiety (PSM), wherein said EAM has a first E0; then contacting the target analyte and said solid support under conditions wherein said target analyte reacts with a peroxide generating enzyme to generate peroxide and said self-immolative moiety is removed such that said EAM has a second E0 test sample; and then detecting said second E0 as an indication of the presence of said target analyte. Also provided are compositions for use in the preceding methods.
91 Citations
14 Claims
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1. A method for detecting a target analyte in a test sample, said method comprising:
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(a) providing a solid support comprising an electrode comprising; (i) a self-assembled monolayer (SAM), (ii) a covalently attached electroactive active moiety (EAM) comprising a transition metal complex comprising a self-immolative moiety and a peroxide sensitive moiety (PSM), wherein said EAM has a first E0, and (b) contacting said target analyte and said solid support under conditions wherein said target analyte reacts with a peroxide generating enzyme to generate peroxide and said self-immolative moiety is removed such that said EAM has a second E0, wherein said peroxide generating enzyme is immobilized or physisorbed onto the solid support, the electrode, or SAM, or wherein said peroxide generating enzyme is in a solution in contact with the electrode; and (c) detecting said second E0 as an indication of the presence of said target analyte. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for detecting a target analyte in a test sample, said method comprising:
(a) providing a solid support comprising an electrode comprising; (i) a self-assembled monolayer (SAM), (ii) a covalently attached electroactive active moiety (EAM) comprising a transition metal complex comprising a self-immolative moiety and a peroxide sensitive moiety (PSM), wherein said EAM has a first E0, and (b) contacting said target analyte and said solid support in the presence of an intermediary enzyme and an additional substrate for said enzyme, under conditions wherein if said analyte is present, the target analyte and said additional substrate reacts with the intermediary enzyme to form a first complex; (c) contacting said target analyte and said solid support in the presence of the intermediary enzyme and the additional substrate for said enzyme with a peroxide generating enzyme under conditions wherein if a first complex is formed, said first complex reacts with said peroxide generating enzyme to generate peroxide and said self-immolative moiety is removed such that said EAM has a second E0, wherein said intermediary enzyme is immobilized or physisorbed onto the solid support, the electrode, or SAM, or wherein said intermediary enzyme is in a solution in contact with the electrode; and (d) detecting said second E0 as an indication of the presence of said target analyte. - View Dependent Claims (8, 9, 10)
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11. A composition comprising a solid support comprising:
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(a) an electrode comprising; (i) a self-assembled monolayer (SAM); (ii) a covalently attached electroactive active moiety (EAM) comprising a transition metal complex comprising a self-immolative moiety and a peroxide sensitive moiety (PSM), wherein said EAM has a first E0 when said self-immolative moiety is covalently attached to said EAM and a second E0 when said self-immolative moiety is absent; and (iii) a capture binding ligand comprising a substrate of an ATP-dependent intermediary enzyme; and (b) a soluble capture ligand comprising a peroxide generating moiety, wherein an intermediary enzyme is immobilized or physisorbed onto the solid support, the electrode, or SAM.
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12. A composition comprising a solid support comprising:
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an electrode comprising; (i) a self-assembled monolayer (SAM); (ii) a covalently attached electroactive active moiety (EAM) comprising a transition metal complex comprising a self-immolative moiety and a peroxide sensitive moiety (PSM), wherein said EAM has a first E0 when said self-immolative moiety is covalently attached to said EAM and a second E0 when said self-immolative moiety is absent; and (iii) a peroxide generating enzyme, wherein said peroxide generating enzyme is immobilized or physisorbed onto the solid support, the electrode, or SAM.
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13. A composition comprising:
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(I) a solid support comprising; (a) an electrode comprising; (i) a self-assembled monolayer (SAM); (ii) a covalently attached electroactive active moiety (EAM) comprising a transition metal complex comprising a self-immolative moiety and a peroxide sensitive moiety (PSM), wherein said EAM has a first E0 when said self-immolative moiety is covalently attached to said EAM and a second E0 when said self-immolative moiety is absent; and (iii) a capture binding ligand comprising a substrate of an ATP-dependent intermediary enzyme; and (b) a soluble capture ligand comprising a peroxide generating moiety; and (II) an intermediary enzyme in a solution in contact with the electrode.
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14. A composition comprising:
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(a) a solid support comprising; an electrode comprising; (i) a self-assembled monolayer (SAM); and (ii) a covalently attached electroactive active moiety (EAM) comprising a transition metal complex comprising a self-immolative moiety and a peroxide sensitive moiety (PSM), wherein said EAM has a first E0 when said self-immolative moiety is covalently attached to said EAM and a second E0 when said self-immolative moiety is absent; and (b) a peroxide generating enzyme, wherein said peroxide generating enzyme is in a solution in contact with the electrode.
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Specification