High-throughput DNA fragment assembly

Patent metadata

Field	Value
Publication number	US-9752154-B2
Application number	US-201314416799-A
Country	US
Kind code	B2
Filing date	Jul 23, 2013
Priority date	Jul 26, 2012
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

This invention is related to methods and systems for vector assembly for transgenic plants. A uniform modular process is used to reduce cycle time and the methods and systems provided herein can increase cloning throughput using multiple-well plates, for example 96-well plates. In some embodiments, the methods and systems provided herein eliminate or reduce the need for sequencing confirmation because no PCR is involved in the vector assembly process.

First claim

We claim:

1. A method for DNA assembly, comprising,
(a) providing a first DNA molecule comprising a Kozak sequence, wherein the Kozak sequence is selected from the group consisting of SEQ ID NOs: 1-43 and 64-74;
(b) providing a second DNA molecule comprising the same Kozak sequence of step (a) at one end and a six frame stop sequence at the other end, wherein the six frame stop sequence is selected from the group consisting of SEQ ID NOs: 75-80;
(c) providing a third DNA molecule comprising the same six frame stop sequence of step (b);
(d) providing a fourth DNA molecule comprising a linear vector sequence; and
(e) assembling a product vector using the DNA molecules of steps (a), (b), (c), and (d) in the presence of at least one recombinase, where the Kozak sequence and the six frame stop sequence provide junction homologies for DNA recombination and wherein the product vector has sequences in the order of the DNA molecules from steps (a), (b), (c), and (d).

2. The method of claim 1 , wherein the DNA molecules of steps (a), (b), (c), and (d) are obtained using PCR amplification or direct DNA synthesis.

3. The method of claim 1 , wherein no DNA amplification technique is used.

4. The method of claim 1 , wherein polymerase chain reaction is not used.

5. The method of claim 1 , wherein the fourth DNA molecule comprises a lethal gene.

6. The method of claim 5 , wherein the lethal gene is ccdB.

7. The method of claim 1 , wherein the same Kozak sequence of both step (a) and (b) comprises a same three-frame stop sequence at its 5′ end.

8. The method of claim 7 , wherein the three-frame stop sequence is selected from the group consisting of SEQ ID NOS 44-62.

Assignees

• Dow Agrosciences Llc
• Kumar Sandeep
• Evans Steven L
• Gupta Manju

Inventors

• Kumar Sandeep
• Evans Steven L
• Gupta Manju

Classifications

• C12N15/68 Primary

  Stabilisation of the vector · CPC title

• C12N15/82 Primary

  for plant cells {, e.g. plant artificial chromosomes (PACs)} · CPC title

• C12N15/8209 Primary

  Selection, visualisation of transformants, reporter constructs, e.g. antibiotic resistance markers · CPC title