Methods of Modifying Support Surfaces for the Immobilization of Particles and the Use of the Immobilized Particles for Analyzing Nucleic Acids
First Claim
1. A method comprising:
- reacting a nucleophilic group on the surface of a substrate with a molecule comprising a plurality of electrophilic groups thereby providing one or more free electrophilic groups on the surface of the substrate; and
reacting nucleophilic groups on a surface of a particulate material with the one or more free Electrophilic groups on the surface of the substrate to covalently attach the particulate material to the substrate.
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Accused Products
Abstract
Methods of modifying a nucleophilic surface of a support are described. The methods involve reacting a multifunctional electrophilic reagent with nucleophilic groups on the surface of the support. The resulting electrophilic surface can be used for the covalent attachment of particles (e.g. beads) having nucleophilic functional groups. For example, nucleic acid templates with nucleophilic (e.g., amine) groups can be attached to a surface of the particles. The nucleophilic groups on the nucleic acid templates can then be used to attach the particles to the modified surface of the support. The resulting support-bound particles can be used to analyze (e.g., sequence) the nucleic acid templates on the particles.
20 Citations
24 Claims
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1. A method comprising:
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reacting a nucleophilic group on the surface of a substrate with a molecule comprising a plurality of electrophilic groups thereby providing one or more free electrophilic groups on the surface of the substrate; and reacting nucleophilic groups on a surface of a particulate material with the one or more free Electrophilic groups on the surface of the substrate to covalently attach the particulate material to the substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An article of manufacture comprising:
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a particulate material comprising surface functional groups; a support comprising surface functional groups; wherein surface functional groups of the particulate material are covalently attached to surface functional groups on the support via a linker group comprising the moiety;
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11. A method comprising:
reacting a nucleophilic group on the surface of a substrate with the compound represented by the formula; - View Dependent Claims (12, 13)
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14. An article of manufacture comprising a moiety covalently attached to a support surface, wherein the moiety is represented by the formula.
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15. A method comprising:
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(a) hybridizing an initializing oligonucleotide probe to a target polynucleotide to form a probe-target duplex, wherein the oligonucleotide probe has an extendable probe terminus, wherein the target polynucleotide is attached to a particulate material and wherein the particulate material is covalently attached to the surface of a support; (b) ligating a first end of an extension oligonucleotide probe to the extendable probe terminus thereby forming an extended duplex containing an extended oligonucleotide probe, wherein the extension oligonucleotide probe comprises a cleavage site and a detectable label; (c) identifying one or more nucleotides in the target polynucleotide by detecting the label attached to the just-ligated extension oligonucleotide probe; (d) cleaving the just-ligated extension oligonucleotide probe at the cleavage site to generate the extendable probe terminus, wherein cleavage removes a portion of the just-ligated extension oligonucleotide probe that comprises the label from the probe-target duplex; and (e) repeating steps (b), (c) and (d). - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of sequencing a nucleic acid comprising:
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(a) hybridizing a primer to a target polynucleotide to form a primer-target duplex, wherein the target polynucleotide is attached to a particulate material at a 5′
end and wherein the particulate material is covalently attached to the surface of a support;(b) contacting the primer-target duplex with a polymerase and one or more different nucleotide analogs to incorporate a nucleotide analog onto the 3′
end of the primer thereby forming an extended primer strand, wherein the incorporated nucleotide analog terminates the polymerase reaction and wherein each of the one or more nucleotide analogs comprises (i) a base selected from the group consisting of adenine, guanine, cytosine, thymine and uracil and their analogs (ii) a unique label attached to the base or analog thereof via a cleavable linker;
(iii) a deoxyribose; and
(iv) a cleavable chemical group which caps an —
OH group at a 3′
-position of the deoxyribose;(c) washing the surface of the support to remove any unincorporated nucleotide analogs; (d) detecting the unique label attached to the just-incorporated nucleotide analog to thereby identify the just-incorporated nucleotide analog; (e) optionally, permanently capping any unreacted —
OH group on the extended primer strand;(f) cleaving the cleavable linker between the just incorporated nucleotide analog and the unique label; (g) cleaving the chemical group capping the —
OH group at the 3′
-position of the deoxyribose of the just incorporated nucleotide analog to uncap the —
OH group;(h) washing the surface of the support to remove cleaved compounds; (i) repeating steps (b)-(h).
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Specification