Cyclooctatetraene containing dyes and compositions
Embodiments of the present disclosure relate to cyclooctatetraene containing dyes and their uses as fluorescent labels. Also provided are composition containing cyclooctatetraene. The dyes and compositions may be used in various biological applications, such as nucleic acid sequencing.
1. A nucleotide labeled with a fluorescent compound, wherein the fluorescent compound comprises a photo-protecting moiety having the structure of formula (I):
wherein:
each of R 1 and R 2 is independently selected from the group consisting of H, —NH 2 , substituted amino, carboxyl, —C(O)OR 5 , —C(O)NR 6 R 7 , unsubstituted C 1-6 alkyl and substituted C 1-6 alkyl;
X is —C(═O)—NR 4 —;
Y is selected from the group consisting of —NR 3 —, —C(═O)—, —C(═O)—O—, —C(═O)—NR 4 —, —S(O) 2 —, —NR 3 —C(═O)—NR 4 , and —NR 3 —C(═S)—NR 4 —;
Z is absent, unsubstituted C 2-6 alkenylene, or unsubstituted C 2-6 alkynylene;
each of R 3 , R 4 , R 6 and R 7 is independently H, unsubstituted C 1-6 alkyl, or substituted C 1-6 alkyl;
R 5 is unsubstituted or substituted C 1-6 alkyl;
m is an integral number between 1 and 10;
provided that the fluorescent compound is not a cyanine dye, and wherein the fluorescent compound is excitable by a light source having a wavelength between about 350 nm to about 500 nm.
2. The nucleotide of claim 1 , wherein Z is absent.
3. The nucleotide of claim 1 , wherein R 4 is H.
4. The nucleotide of claim 1 , wherein R 4 is C 1-6 alkyl substituted with —NH 2 , —SO 3 H, —SO 3 − , carboxyl, —C(O)OR 5 , or —C(O)NR 6 R 7 .
5. The nucleotide of claim 1 , wherein Y is —C(═O)—O—, —NR 3 — or —S(O) 2 —.
6. The nucleotide of claim 5 , wherein Y is —NR 3 — and R 3 is H or C 1-6 alkyl substituted with —NH 2 , carboxyl, —SO 3 H, —SO 3 − , —C(O)OR 5 , or —C(O)NR 6 R 7 .
7. The nucleotide of claim 6 , wherein the photo-protecting moiety has the structure of formula (Ia) or (Id):
8. The nucleotide of claim 1 , wherein at least one of R 1 and R 2 is hydrogen.
9. The nucleotide of claim 8 , wherein m is 2, 3, 4, 5 or 6, and each one of R 1 and R 2 is hydrogen.
10. The nucleotide of claim 8 , wherein m is 2, 3, 4, 5 or 6, wherein each one of R 1 and R 2 is hydrogen in
and wherein R 1 is H; and R 2 is —NH 2 , carboxyl, —C(O)OR 5 , or —C(O)NR 6 R 7 in the remaining
11. The nucleotide of claim 10 , wherein R 6 is H and R 7 is C 1-6 alkyl substituted with carboxyl, —NH 2 , —SO 3 H, or —SO 3 − .
12. The nucleotide of claim 10 , wherein both R 6 and R 7 are independently C 1-6 alkyl substituted with carboxyl, —NH 2 , —SO 3 H, or —SO 3 − .
13. The nucleotide of claim 1 , wherein the photo-protecting moiety has the structure:
14. The nucleotide of claim 1 , wherein the fluorescent compound is excitable by a light source having a wavelength between about 420 nm and about 480 nm, or between about 450 nm and about 460 nm.
15. A kit comprising two or more different types of nucleotides, wherein at least one type of nucleotide is a labeled nucleotide according to claim 1 .
16. The kit according to claim 15 , comprising four different types of nucleotides, wherein a first type of nucleotide is a labeled nucleotide according to claim 1 , and the second, third, and fourth types of nucleotides are each labeled with a different compound, wherein each compound has a distinct absorbance maximum and each of the compounds is spectrally distinguishable from the other three compounds.
17. The kit according to claim 15 , comprising four different types of nucleotides, wherein a first type of nucleotide is a labeled nucleotide according to claim 1 , a second type of nucleotide is labeled with a spectrally distinct second fluorescent compound, a third type of nucleotide is labeled with both the fluorescent compound and the spectrally distinct second fluorescent compound, and a fourth type of nucleotide is unlabeled (dark).
18. The kit of claim 17 , wherein the four different types of nucleotides are excitable using two lasers with two different wavelengths.
19. The kit of claim 18 , wherein at least one laser has a wavelength from about 420 nm to about 480 nm, or from about 450 nm to about 460 nm.
20. A kit comprising two or more different types of nucleotides, wherein at least one type of nucleotide is a labeled nucleotide according to claim 13 .
21. A method of reducing or preventing light-induced degradation of nucleic acids during nucleic acid sequencing reaction, comprising:
(a) contacting a solid support with an incorporation mixture comprising DNA polymerase and one or more of four different types of nucleotides, wherein the solid support comprises a plurality of immobilized target polynucleotides and sequencing primers that are complementary and hybridized to at least a portion of the target polynucleotides, wherein one or more of four different types of nucleotides carries a fluorescent label, one type of nucleotides is the nucleotide of claim 1 , and each type of nucleotides comprises a 3′ blocking group;
(b) incorporating one type of nucleotides into sequencing primers to produce extended copy polynucleotide strands;
(c) performing one or more fluorescent measurements to determine the identity of the incorporated nucleotides in a first buffer composition;
(d) chemically removing the 3′ blocking group of the incorporated nucleotides; and
(e) washing the extended copy polynucleotide strands with a wash solution.
22. The method of claim 21 , wherein step (d) also removes the fluorescent label of the incorporated nucleotides.
23. The method of claim 21 , wherein steps (a) to (e) are repeated at least 50 times.
24. The method of claim 21 , wherein step (c) comprises irradiating the extended copy polynucleotide strands in the first buffer composition with a light source having a wavelength from about 400 nm to about 500 nm.
25. The method of claim 21 , wherein step (d) comprises contacting the extended copy polynucleotide strands with a phosphine.
26. The method of claim 25 , wherein the phosphine is tris(hydroxymethyl)phosphine, tris(hydroxyethyl)phosphine, or tris(hydroxypropyl)phosphine.
27. The method of claim 21 , wherein the first buffer solution comprises ascorbic acid or a salt thereof.
28. A method of reducing or preventing light-induced degradation of nucleic acids during nucleic acid sequencing reaction, comprising:
(a) contacting a solid support with an incorporation mixture comprising a DNA polymerase and one or more of four different types of nucleotides, wherein the solid support comprises a plurality of immobilized target polynucleotides and sequencing primers that are complementary and hybridized to at least a portion of the target polynucleotides, wherein one or more of four different types of nucleotides each carries a fluorescent label, one type of nucleotides is the nucleotide of claim 14 , and each type of nucleotides comprises a 3′ blocking group;
(b) incorporating one type of nucleotides into sequencing primers to produce extended copy polynucleotide strands;
(c) performing one or more fluorescent measurements to determine the identity of the incorporated nucleotides in a first buffer composition;
(d) chemically removing the 3′ blocking group of the incorporated nucleotides; and
(e) washing the extended copy polynucleotide strands with a wash solution.