Nucleic acid capture moieties

• US 5,770,365 A
• Filed: 08/25/1995
• Issued: 06/23/1998
• Est. Priority Date: 08/25/1995
• Status: Expired due to Term

• Current Assignee: Tm Bioscience Corporation (DiaSorin S.p.A.)
• Original Assignee: TM Technologies, Inc.
• Inventors: Benight, Albert S., Lane, Michael J., Faldasz, Brian D.
• Primary Examiner(s): Zitomer, Stephanie W.
• Assistant Examiner(s): TRAN, PAUL
• Application Number:
  US08/519,197
• Time in Patent Office: 1,033 Days
• Field of Search: 435/6, 536/24.3, 935/77, 935/78
• US Class Current: 435/6.12
• CPC Class Codes: C12Q 1/6813 Hybridisation assays
• CPC Class Codes: C12Q 1/6834 Enzymatic or biochemical coupling of nucleic acids to a solid phase

Abstract

Nucleic acid capture moieties, methods of using nucleic acid capture moieties, reaction mixtures including nucleic acid capture moieties, and kits including nucleic acid capture moieties are disclosed.

Claims

1. A method of promoting the hybridization of a target single-stranded nucleic acid and a nucleic acid capture moiety comprising:

a) providing a unimolecular nucleic acid capture moiety having a double-stranded region with a terminal base and an adjacent single-stranded region, the terminal base of the double-stranded region being all or part of a duplex-binding-ligand binding site, and said single-stranded region being capable of hybridizing to said target nucleic acid, wherein said unimolecular nucleic acid capture moiety is bound to a solid support;

b) forming a reaction mixture comprising said target single-stranded nucleic acid, said nucleic acid capture moiety, and a duplex-binding ligand, under conditions such that the target single-stranded nucleic acid and the nucleic acid capture moiety can hybridize; and

c) allowing said target single-stranded nucleic acid to hybridize to said nucleic acid capture moiety such that said duplex-binding ligand binds to the intermolecular duplex thereby formed,

such that the hybridization of the target single-stranded nucleic acid and the nucleic acid capture moiety is promoted.

2. The method of claim 1, wherein a first base pair of a duplex formed by the target single-stranded nucleic acid and the single-stranded region of the nucleic acid capture moiety encodes part of the duplex-binding-ligand binding site.

3. The method of claim 1, wherein the nucleic acid capture moiety comprises a nucleic acid hairpin.

4. The method of claim 1, wherein stability of the intermolecular duplex is increased by base stacking between the terminal base of the nucleic acid capture moiety and a terminal base of the target single-stranded nucleic acid which forms a part of the intermolecular duplex.

5. A method of detecting a target single-stranded nucleic acid sequence, comprising:

a) providing a nucleic acid capture moiety comprising a structure A-B-C-D wherein

A is a nucleic acid sequence;

B and D are nucleic acid sequences which are capable of hybridizing to each other to form an intramolecular duplex; and

C is a linker which covalently links B and D;

wherein A is substantially complementary to a target single-stranded nucleic acid sequence and the nucleic acid capture moiety is immobilized on an insoluble support;

b) forming a reaction mixture comprising said target single-stranded nucleic acid and said nucleic acid capture moiety under conditions such that a B;

D intramolecular duplex can form and the target single-stranded nucleic acid and the nucleic acid capture moiety can hybridize; and

c) detecting the presence or absence of hybridization of the target nucleic acid and the nucleic acid capture moiety;

such that the target single-stranded nucleic acid is detected.

6. The method of claim 5, wherein the terminal base of D comprises all or part of a duplex-binding-ligand binding site.

7. The method of claim 5, wherein said reaction mixture further comprises a duplex-binding ligand.

8. The method of claim 7, wherein the duplex-binding ligand does not covalently modify any duplex.

9. The method of claim 5, wherein stability of the intermolecular duplex is increased by base stacking between the terminal base of the nucleic acid capture moiety and a terminal base of the target single-stranded nucleic acid which forms a part of the intermolecular duplex.

10. The method of claim 5, wherein the detecting step comprises detecting a secondary probe.

11. The method of claim 10, wherein the secondary probe comprises a label.

12. A method of detecting a target single-stranded nucleic acid sequence, comprising:

a) providing a nucleic acid capture moiety comprising a structure A-B-C-D wherein

A is a nucleic acid sequence;

B and D are nucleic acid sequences which are capable of hybridizing to each other to form an intramolecular duplex; and

C is a linker which covalently links B and D;

wherein A is substantially complementary to a target single-stranded nucleic acid sequence and the nucleic acid capture moiety is immobilized on an insoluble support;

b) forming a reaction mixture comprising said target single-stranded nucleic acid and said nucleic acid capture moiety under conditions such that a B;

D intramolecular duplex can form and the target single-stranded nucleic acid and the nucleic acid capture moiety can hybridize to form an intermolecular duplex, wherein the intermolecular duplex comprises a duplex-binding-ligand binding site; and

c) detecting the presence or absence of hybridization of the target nucleic acid and the nucleic acid capture moiety;

such that the target single-stranded nucleic acid is detected.

13. The method of claim 12, wherein hybridization of the target single-stranded nucleic acid to the nucleic acid capture moiety forms a nicked duplex.

14. The method of claim 12, wherein the duplex-binding-ligand binding site does not include a nick.

15. The method of claim 12, wherein the reaction mixture further comprises a duplex-binding ligand.

16. The method of claim 15, wherein the duplex-binding ligand is sequence-specific.

17. The method of claim 15, wherein the duplex-binding ligand does not covalently modify any duplex.

18. The method of claim 12, wherein stability of the intermolecular duplex is increased by base stacking between the terminal base of the nucleic acid capture moiety and a terminal base of the target single-stranded nucleic acid increases stability of the intermolecular duplex.

19. A method of promoting the hybridization of a target single-stranded nucleic acid and a nucleic acid capture moiety comprising:

a) providing a unimolecular nucleic acid capture moiety having a double-stranded region and an adjacent single-stranded region, said single-stranded region being capable of hybridizing to said target nucleic acid, wherein said unimolecular nucleic acid capture moiety is bound to a solid support;

b) forming a reaction mixture comprising said target single-stranded nucleic acid, said nucleic acid capture moiety, and a duplex-binding ligand, under conditions such that the target single-stranded nucleic acid and the nucleic acid capture moiety can hybridize; and

c) allowing said target single-stranded nucleic acid to hybridize to said nucleic acid capture moiety to form an intermolecular duplex, wherein the intermolecular duplex comprises a duplex-binding-ligand binding site, such that said duplex-binding ligand binds to said duplex-binding-ligand binding site,

such that the hybridization of the target single-stranded nucleic acid and the nucleic acid capture moiety is promoted.

20. The method of claim 19, wherein the nucleic acid capture moiety comprises a nucleic acid hairpin.

21. The method of claim 19, wherein the duplex-binding ligand does not covalently modify any duplex.

22. The method of claim 19, wherein the duplex-binding-ligand binding site does not include a nick.

23. The method of claim 19, wherein stability of the intermolecular duplex is increased by base stacking between the terminal base of the nucleic acid capture moiety and a terminal base of the target single-stranded nucleic acid which forms a part of the intermolecular duplex.

24. A method of capturing a target single-stranded nucleic acid sequence from a sample, comprising:

a) providing a nucleic acid capture moiety comprising a structure A-B-C-D wherein

A is a nucleic acid sequence;

B and D are nucleic acid sequences which are capable of hybridizing to each other to form an intramolecular duplex; and

C is a linker which covalently links B and D;

wherein A is substantially complementary to the target single-stranded nucleic acid sequence and the nucleic acid capture moiety is immobilized on an insoluble support;

b) forming a reaction mixture comprising said target single-stranded nucleic acid and said nucleic acid capture moiety under conditions such that a B;

D intramolecular duplex can form and the target single-stranded nucleic acid hybridizes to said nucleic acid capture moiety; and

c) separating the target single-stranded nucleic acid hybridized to said nucleic acid capture moiety from the reaction mixture;

such that the target single-stranded nucleic acid is captured.