Polypeptide arrays
View Patent ↗The present invention provides methods and apparatus for sequencing, fingerprinting and mapping biological macromolecules, typically biological polymers. The methods make use of a plurality of sequence specific recognition reagents which can also be used for classification of biological samples, and to characterize their sources.
1. A substrate with a surface comprising a plurality of polypeptides with different, known sequences bound to the surface in positionally defined locations, at a density exceeding 400 different polypeptides occupying a total area of less than 1 cm 2 on said substrate, each of said polypeptides having a different polypeptide sequence.
2. The substrate as recited in claim 1 , wherein said substrate comprises 10 3 or more different polypeptides with known sequences bound to positionally defined locations of said substrate.
3. The substrate as recited in claim 1 , wherein said substrate comprises 10 4 or more different polypeptides with known sequences bound to positionally defined locations of said substrate.
4. The substrate as recited in claim 1 , wherein said substrate comprises 10 5 or more different polypeptides with known sequences bound to positionally defined locations.
5. The substrate as recited in claim 1 , wherein said substrate comprises 10 6 or more different polypeptides with known sequences bound to positionally defined locations.
6. The substrate as recited in claim 1 , wherein said polypeptides are at least 50% pure within said positionally defined locations.
7. The substrate as recited in claim 1 , wherein the polypeptides are covalently attached to the surface.
8. The substrate as recited in claim 1 , wherein the polypeptides are attached to the surface by a linker.
9. A substrate with a surface comprising a plurality of polypeptides with different, known sequences bound to the surface in positionally defined locations, at a density exceeding 1000 different polypeptides occupying a total area of less than 1 cm 2 on said substrate, each of said polypeptides having a different polypeptide sequence.
10. The substrate as recited in claim 9 , wherein said substrate comprises 10 3 or more different polypeptides with known sequences bound to positionally defined locations of said substrate.
11. The substrate as recited in claim 9 , wherein said substrate comprises 10 4 or more different polypeptides with known sequences bound to positionally defined locations of said substrate.
12. The substrate as recited in claim 9 , wherein said substrate comprises 10 6 or more different polypeptides with known sequences bound to positionally defined locations.
13. The substrate as recited in claim 9 , wherein said substrate comprises 10 6 or more different polypeptides with known sequences bound to positionally defined locations.
14. An array of more than 1,000 different polypeptides with known sequences bound to a surface of a substrate, said polypeptides each in positionally defined locations and differing from other polypeptides in monomer sequence, each of said positionally defined locations being an area of less than about 0.01 cm 2 and each positionally defined location comprising polypeptides of known sequence, said different polypeptides occupying a total area of less than 1 cm 2 .
15. The array as recited in claim 14 , wherein said positionally defined locations each have an area of about 1×10 −2 cm 2 to about 1×10 −5 cm 2 .
16. The array as recited in claim 15 , wherein said positionally defined locations each have an area of about 1×10 −2 cm 2 to about 1×10 −4 cm 2 .
17. The array as recited in claim 16 , wherein said positionally defined locations each have an area of about 1×10 −2 cm 2 to about 1×10 −3 cm 2 .
18. The array as recited in claim 14 , made by the process of:
a) providing a polypeptide array comprising at least two different polypeptides immobilized on a surface, and wherein said polypeptides are synthesized on said surface;
b) contacting said surface with a first protected amino acid wherein said first protected amino acid is selectively coupled to a functional group in a first selectively activated region of said surface;
c) contacting said surface with a second protected amino acid without physical segregation of said surface such that said second protected amino acid is selectively coupled to a functional group in a second selectively activated region of said surface; and
d) repeating the above steps until at least 1,000 different polypeptides are formed at positionally defined locations within the selectively activated regions on said substrate surface.
19. The array as recited in claim 18 , wherein said first selectively activated region of said substrate is exposed to light to remove a photoremovable group from said first protected amino acid.
20. The array as recited in claim 14 , comprising more than 10,000 polypeptides of known sequences.
21. An array of polypeptides, said array of polypeptides comprising:
a substrate having a surface; and
a plurality of different polypeptides bound to said surface at a density exceeding 400 different polypeptides/cm 2 , wherein each of said plurality of different polypeptides is attached to said surface in a different positionally defined location of area greater than 100 square, microns and has a different determinable sequence.
22. The array of claim 21 , wherein said substrate is a solid support.
23. The array of claim 22 , wherein said solid support is a member selected from the group consisting of particles, strands, precipitates, gels, sheets, tubing, spheres, containers, capillaries, pads, slices, films, plates and slides.
24. The array of claim 22 , wherein said solid support is made of a member selected from the group consisting of polymers, plastics, resins, polysaccharides, silica or silica-based materials, carbon, metals, inorganic glasses, and membranes.
25. The array of claim 22 , wherein said solid support is glass.
26. The array of claim 22 , wherein said solid support is a gel.
27. The array of claim 22 , wherein said polypeptides are attached to said solid support through a linker group.
28. The array of claim 22 , wherein said array comprises at least 1,000 different polypeptides attached to said solid support.
29. The array of claim 22 , wherein said array comprises at least 10,000 different polypeptides attached to said solid support.
30. The array of claim 22 , wherein said plurality of different polypeptides attached to said surface are at a density exceeding 1000 different polypeptides/cm 2 .
31. The array of claim 21 , wherein each of said different positionally defined locations is physically separated from each of the other positionally defined locations.
32. The array of claim 21 , wherein said polypeptides in said different positionally defined locations are at least 20% pure.
33. The array of claim 21 , wherein said polypeptides in said different positionally defined locations are at least 50% pure.
34. The array of claim 21 , wherein said polypeptides in said different positionally defined locations are at least 80% pure.
35. The array of claim 21 , wherein said polypeptides in said different positionally defined locations are at least 90% pure.
36. The array of claim 22 , wherein said array is produced by a process comprising:
providing a planar, non-porous solid support, said solid support having a plurality of compounds immobilized on a surface thereof, said compounds having protecting groups coupled thereto; deprotecting a first portion of said plurality of compounds on said surface and not a second portion of said plurality of compounds;
reacting said first portion of said plurality of compounds with a first reactant;
deprotecting a third portion of said plurality of compounds on said surface, said third portion comprising a fraction of said first portion of said plurality of compounds;
reacting said third portion of said plurality of compounds with a second reactant; and
optionally repeating said synthesis steps to produce said polypeptide array.
37. The array of claim 21 , wherein said polypeptides in said different positionally defined locations are at least 10% pure.
38. The array of claim 21 , wherein said substrate is rigid.
39. An array of polypeptides, said array of polypeptides comprising:
a planar rigid support having at least a first surface; and
a plurality of different polypeptides bound to said first surface of said planar rigid support at a density exceeding 400 different polypeptides/cm 2 , wherein each of said different polypeptides is attached to said first surface of said planar rigid support and has a different determinable sequence.
40. The array of claim 39 , wherein said density exceeds 1000 different polypeptides occupying a total area of less than 1 cm 2 on said planar rigid support.
41. The array of claim 39 , wherein said plurality of different polypeptides exceeds 1000 different polypeptides wherein each of said plurality of different polypeptides is attached to said first surface in a different positionally defined location of area greater than 100 square microns and has a different determinable sequence.