Labeled nucleotide analogs, reaction mixtures, and methods and systems for sequencing
Labeled nucleotide analogs comprising at least one avidin protein, at least one dye-labeled compound, and at least one nucleotide compound are provided. The analogs are useful in various fluorescence-based analytical methods, including the analysis of highly multiplexed optical reactions in large numbers at high densities, such as single molecule real time nucleic acid sequencing reactions. The analogs are detectable with high sensitivity at desirable wavelengths. They contain structural components that modulate the interactions of the analogs with DNA polymerase, thus decreasing photodamage and improving the kinetic and other properties of the analogs in sequencing reactions. Also provided are nucleotide and dye-labeled compounds of the subject analogs, as well as intermediates useful in the preparation of the compounds and analogs. Compositions comprising the compounds, methods of synthesis of the intermediates, compounds, and analogs, and mutant DNA polymerases are also provided.
1. A labeled nucleotide analog comprising:
a first avidin protein having four subunits, each subunit comprising one biotin binding site;
a first nucleotide compound bound to the first avidin protein, the first nucleotide compound comprising a polyphosphate element, a nucleoside element, an optional multivalent central core element, a terminal coupling element, and a nucleotide linker element, wherein the first nucleotide compound comprises at least one affinity modulating element; and
a first dye-labeled compound bound to the first avidin protein, wherein the first dye-labeled compound is a compound of structural formula (IIIA), (IIIB), (IIIC), (IIID), or (IIIE):
wherein
each L′ is independently a dye compound linker element;
each S is independently a shield element;
each A is independently an acceptor dye;
each D is independently a donor dye;
each B″ is independently a terminal coupling element;
each p is independently 0 or 1; and
each r is independently an integer from 0 to 8;
wherein the compound of structural formula (IIIA), (IIIB), (IIIC), (IIID), or (IIIE) comprises at least one shield element, at least one acceptor dye, and at least one donor dye; and
wherein the at least one shield element does not comprise a protein.
2. The labeled nucleotide analog of claim 1 , wherein each r is independently an integer from 0 to 4.
3. The labeled nucleotide analog of claim 1 , wherein the first dye-labeled compound comprises at least two donor dyes.
4. The labeled nucleotide analog of claim 1 , wherein the first dye-labeled compound comprises at least two acceptor dyes.
5. The labeled nucleotide analog of claim 1 , wherein the first dye-labeled compound comprises at least two donor dyes and at least two acceptor dyes.
6. The labeled nucleotide analog of claim 1 , wherein at least one dye compound linker element comprises a shield element or a side chain element.
7. The labeled nucleotide analog of claim 1 comprising two terminal coupling elements.
8. The labeled nucleotide analog of claim 1 , wherein the terminal coupling element comprises a biotin moiety.
9. The labeled nucleotide analog of claim 8 , wherein the terminal coupling element comprises a bis-biotin moiety.
10. The labeled nucleotide analog of claim 1 , wherein the at least one acceptor dye or the at least one donor dye is a cyanine dye.
11. The labeled nucleotide analog of claim 1 , wherein the first dye-labeled compound does not contain a nucleoside.
12. A labeled nucleotide analog comprising:
a first avidin protein having four subunits, each subunit comprising one biotin binding site;
a first nucleotide compound bound to the first avidin protein, the first nucleotide compound comprising a polyphosphate element, a nucleoside element, an optional multivalent central core element, a terminal coupling element, and a nucleotide linker element, wherein the first nucleotide compound comprises at least one affinity modulating element; and
a first dye-labeled compound bound to the first avidin protein, wherein the first dye-labeled compound is a compound of structural formula (IIIF):
wherein
each L′ is independently a dye compound linker element;
each S is independently a shield element;
each A is independently an acceptor dye;
each D is independently a donor dye;
each B″ is independently a terminal coupling element;
each p is independently 0 or 1; and
each r′ is independently an integer from 0 to 4;
wherein the compound of structural formula (IIIF) comprises at least one shield element, at least one acceptor dye, and at least one donor dye; and
wherein the at least one shield element does not comprise a protein.
13. The labeled nucleotide analog of claim 12 , wherein each r′ is independently an integer from 0 to 2.
14. The labeled nucleotide analog of claim 13 , wherein each r′ is independently 0 or 1.
15. The labeled nucleotide analog of claim 12 comprising at least two donor dyes.
16. The labeled nucleotide analog of claim 12 comprising at least two acceptor dyes.
17. The labeled nucleotide analog of claim 12 comprising at least two donor dyes and at least two acceptor dyes.
18. The labeled nucleotide analog of claim 12 , wherein at least one dye compound linker element comprises a shield element or a side chain element.
19. The labeled nucleotide analog of claim 12 comprising two terminal coupling elements.
20. The labeled nucleotide analog of claim 12 , wherein the terminal coupling element comprises a biotin moiety.
21. The labeled nucleotide analog of claim 20 , wherein the terminal coupling element comprises a bis-biotin moiety.
22. The labeled nucleotide analog of claim 12 , wherein the at least one acceptor dye or the at least one donor dye is a cyanine dye.
23. The labeled nucleotide analog of claim 12 , wherein the first one dye-labeled compound does not contain a nucleoside.