Novel process, construct and conjugate for producing multiple nucleic acid copies

• US 20110097791A1
• Filed: 06/06/2003
• Published: 04/28/2011
• Est. Priority Date: 04/16/1999
• Status: Abandoned Application

• Current Assignee: Dean L. Engelhardt, Elazar Rabbani, James J. Donegan, Jannis G. Stavrianopoulos
• Original Assignee: Dean L. Engelhardt, Elazar Rabbani, James J. Donegan, Jannis G. Stavrianopoulos
• Inventors: Stavrianopoulos, Jannis G., Engelhardt, Dean L., Donegan, James J., Rabbani, Elazar
• Application Number:
  US10/260,031
• Publication Number:
  US 20110097791A1
• Time in Patent Office: Days
• US Class Current: 435/320.1
• CPC Class Codes: C12N 15/10 Processes for the isolation, preparation or purification of DNA or RNA chemical preparation of DNA or RNA C07H21/00; preparation of non-structural polynucleotides from microorganisms or with enzymes C12P19/34
• CPC Class Codes: C12N 15/79 Vectors or expression systems specially adapted for eukaryotic hosts
• CPC Class Codes: C12P 19/34 Polynucleotides, e.g. nucleic acids, oligoribonucleotides
• CPC Class Codes: C12Q 1/6844 Nucleic acid amplification reactions
• CPC Class Codes: C12Q 1/6853 using modified primers or templates
• CPC Class Codes: C12Q 1/6858 Allele-specific amplification
• CPC Class Codes: C12Q 1/686 Polymerase chain reaction [PCR]
• CPC Class Codes: C12Q 1/6865 Promoter-based amplification, e.g. nucleic acid sequence amplification [NASBA], self-sustained sequence replication [3SR] or transcription-based amplification system [TAS]
• CPC Class Codes: C12Q 2521/119 RNA polymerase
• CPC Class Codes: C12Q 2525/203 incorporating a composite nucleic acid containing a polypeptide sequence other than PNA

Abstract

This invention provides inter alia an in vitro process for producing multiple specific nucleic acid copies in which the copies are produced under isostatic conditions, e.g., temperature, buffer and ionic strength, and independently of any requirement for introducing an intermediate structure for producing the copies. In other aspects, the invention provides in vitro processes for producing multiple specific nucleic acid copies in which the products are substantially free of any primer-coded sequences, such sequences having been substantially or all removed from the product to regenerate a primer binding site, thereby allowing new priming events to occur and multiple nucleic acid copies to be produced. This invention further provides a promoter-independent non-naturally occurring nucleic acid construct that produces a nucleic acid copy or copies without using or relying on any gene product that may be coded by the nucleic acid construct. Another aspect of this invention concerns a protein-nucleic acid construct in the form of a conjugate linked variously, e.g., covalent linkage, complementary nucleic acid base-pairing, nucleic acid binding proteins, or ligand receptor binding. Further disclosed in this invention is an in vivo process for producing a specific nucleic acid in which such a protein-nucleic acid construct conjugate is introduced into a cell. A still further aspect of the invention relates to a construct comprising a host promoter, second promoter and DNA sequence uniquely located on the construct. The host transcribes a sequence in the construct coding for a different RNA polymerase which after translation is capable of recognizing its cognate promoter and transcribing from a DNA sequence of interest in the construct with the cognate promoter oriented such that it does not promote transcription from the construct of the different RNA polymerase.

Claims

1-90. -90. (canceled)

91. A construct comprising a host eukaryotic promoter located on the construct such that the host eukaryotic promoter transcribes the coding sequence for a different DNA-dependent (directed) RNA polymerase which mRNA after translation is capable of producing said RNA polymerase, said RNA polymerase thereafter recognizing its cognate promoter in said construct and transcribing form a DNA sequence of interest in the construct with said cognate promoter oriend such that it does not poromote transcription form the construct of said different DNA-dependent (directed) RNA polymerase, wherein said construct is replication-deficient and functions for:

1) transient expression;

or

     2) stable expression after integration into a chromosome, or both

     1) and

     2).

92. The construct of claim 91, which further comprises a cognate promoter located upstream from said host eukaryotic promoter, said cognate promoter being selected from the group consisting of a cognate prokaryotic promoter and a cognate eukaryotic promoter.

93. The construct of claim 91, wherein said host eukaryotic promoter and said cognate promoter for said different DNA-dependent (directed) RNA polymerase are located on different strands.

94. The construct of claim 92, wherein said cognate prokaryotic promoter or said cognate eukaryotic promoter corresponds to said coded DNA-dependent (directed RNA polymerase.

95. The construct of claim 92, wherein said host eukaryotic promoter or said cognate eukaryotic promoter, or both, are selected from the group consisting of Pol I, Pol II, Pol III, and a combination of any of the foregoing.

96. The construct of claim 91, wherein said different DNA-dependent (directed) RNA polymerase is selected from the group consisting of Pol I, Pol II, Pol III, T7, T3, SP6 and a combination of any of the foregoing.

97. The construct of claim 91, wherein said DNA sequence of interest comprises sense or antisense, or both.

98. The construct of claim 91, wherein said DNA sequence of interest comprises deoxyribonucleic acid or codes for ribonucleic acid.

99. The construct of claim 91, wherein said DNA sequence of interest encodes a protein.