Claims
- 1. A genomic cloning method for identifying DNA segments containing genes in complex genomes, said method comprising:
constructing a genomic library in an environment that eliminates repetitive sequences, said library comprising fragments of genomic DNA; inserting said genomic DNA into a suitable vector, and characterizing said DNA segment. 2.
- 2. The method of claim 1 further comprising the step of randomly shearing said genomic DNA for insertion into said vector.
- 3. The method of claim 1 further comprising the steps of size fractionating said genomic DNA.
- 4. The method of claim 1 wherein the restrictive environment is established using mechanical size fractionation of said DNA and selective hybridization followed by hydroxylapatite chromatography.
- 5. The method of claim 1 wherein said hydroxylapitite selective hybridization is conducted at Cot values between 0.01 and 100.
- 6. The method of claim 1 wherein the size fractionated DNA fragments are fragments of a size smaller than the size of uninterrupted genetic sequences in the genomic DNA.
- 7. The method of claim 1 wherein the size fractionated DNA fragments range from about 0.5 to about 4 kilobase pairs.
- 8. The method of claim 1 wherein said vector is selected from a group consisting of: phage, plasmid or other suitable vectors.
- 9. The method of claim 1 wherein said phage vector is M13.
- 10. The method of claim 1 wherein said complex genome is a plant genome.
- 11. The method of claim 1 where said genome is a cereal grain genome.
- 12. The method of claim 8 wherein said plant genome is selected from the group consisting of: maize, rice, Brassica, soybean, and wheat.
- 13. The method of claim 1 wherein said complex genome is a mammalian genome.
- 14. A genomic cloning method for identifying DNA segments containing genes in complex genomes, said method comprising:
constructing a genomic library in an environment that eliminates repetitive sequences, said library comprising fragments of genomic DNA; said environment established using mechanical shearing of said genomic DNA, selective hybridization at Cot values of between approximately 0.01 and 100, followed by hydroxylapatite chromatography; inserting said genomic DNA into a suitable vector, and characterizing said DNA segment.
- 15. A genomic cloning method for identifying DNA segments containing genes in complex genomes, said method comprising:
constructing a genomic library in a methylation restrictive environment, said library comprising fragments of genomic DNA; inserting said genomic DNA into a suitable vector, and characterizing said DNA segment.
- 16. The method of claim 15 further comprising the step of randomly shearing said genomic DNA for insertion into said vector.
- 17. The method of claim 15 further comprising the steps of size fractionating said genomic DNA.
- 18. The method of claim 15 wherein the methylation restrictive environment comprises cell extracts of methylation restrictive bacteria: mcrA+/mcrBC+, mcrA−/mcrBC+or mcrA+/mcrBC−, or any other methylation restriction system that has similar properties to the mcr system.
- 19. The method of claim 18 wherein said methylation restrictive bacterial strain is selected from a group comprising: JM101, JM107, and JM109.
- 20. The method of claim 15 wherein the methylation restrictive environment comprises cell-free enzyme encoded by a methylation restrictive bacterial gene: mcrA+/mcrBC+, mcrA−/mcrBC+or mcrA+/mcrBC−, or any other methylation restriction system that has similar properties to the mcr system.
- 21. The method of claim 15 wherein the methylation restrictive environment comprises cell-free enzyme encoded by mcrBC.
- 22. The method of claim 15 wherein the size fractionated DNA fragments are fragments of a size smaller than the size of uninterrupted genetic sequences in the genomic DNA.
- 23. The method of claim 15 wherein the size fractionated DNA fragments range from about 0.5 to about 4 kilobase pairs and the DNA is cleaved with a methylation insensitive restriction enzyme.
- 24. The method of claim 15 wherein a methylation insensitive endonuclease is employed to generate DNA fragments.
- 25. The method of claim 23 wherein said methylation insensitive endonuclease is Spe I.
- 26. The method of claim 15 wherein said vector is selected from a group consisting of: phage, plasmid or other suitable vectors.
- 27. The method of claim 15 wherein said phage vector is M13.
- 28. The method of claim 15 wherein said complex genome is a plant genome.
- 29. The method of claim 15 where said genome is a cereal grain genome.
- 30. The method of claim 28 wherein said plant genome is selected from the group consisting of: maize, rice, Brassica, soybean, and wheat.
- 31. The method of claim 15 wherein said complex genome is a mammalian genome.
- 32. A genomic cloning-method for identifying DNA segments containing genes in complex genomes, said method comprising:
constructing a genomic library in an environment that eliminates repetitive sequences by selective protein binding of said genomic DNA, said library comprising fragments of genomic DNA; inserting said genomic DNA into a suitable vector, and characterizing said DNA segment.
- 33. The method of claim 32 further comprising the step of randomly shearing said genomic DNA for insertion into said vector.
- 34. The method of claim 32 further comprising the steps of size fractionating said genomic DNA.
- 35. The method of claim 32 wherein the restrictive environment is established using mechanical size fractionation of said DNA and by methyl-CpG binding domain protein chromatography.
- 36. The method of claim 32 wherein the size fractionated DNA fragments are fragments of a size smaller than the size of uninterrupted genetic sequences in the genomic DNA.
- 37. The method of claim 32 wherein the size fractionated DNA fragments range from about 0.5 to about 4 kilobase pairs.
- 38. The method of claim 32 wherein said vector is selected from a group consisting of: phage, plasmid or other suitable vectors.
- 39. The method of claim 32 wherein said phage vector is M13.
- 40. The method of claim 32 wherein said complex genome is a plant genome.
- 41. The method of claim 32 where said genome is a cereal grain genome.
- 42. The method of claim 40 wherein said plant genome is selected from the group consisting of: maize, rice, Brassica, soybean, and wheat.
- 43. The method of claim 40 wherein said complex genome is a mammalian genome.
- 44. The method of claim 32 wherein said column chromatography is conducted using an elution buffer of approximately 0.4 M NaCl.
- 45. The method of claim 32 wherein said column chromatography is conducted using Ni2+NTA agarose.
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application is a continuation-in-part of U.S. patent application, Ser. No. 09/430,409 filed Oct. 29, 1999, which is a continuation of co-pending U.S. Provisional Application, Serial No. 60/121,453, filed Feb. 24, 1999, the disclosures of which are hereby specifically incorporated by reference.
GRANT REFERENCE
[0002] Work for this invention was funded in part by a grant from the United States Department of Agriculture, Agricultural Research Service Grant #97-35300-4564. The Government may have certain rights in this invention.
Provisional Applications (1)
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Number |
Date |
Country |
|
60121453 |
Feb 1999 |
US |
Continuations (1)
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Number |
Date |
Country |
Parent |
09713426 |
Nov 2000 |
US |
Child |
10371833 |
Feb 2003 |
US |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
09430409 |
Oct 1999 |
US |
Child |
09713426 |
Nov 2000 |
US |