Regulation of quinolate phosphoribosyl transferase expression
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C12N-015/29
C12N-015/54
C12N-015/82
A01H-005/00
A01H-005/10
출원번호
US-0356076
(2003-01-31)
등록번호
US-7304220
(2007-12-04)
발명자
/ 주소
Conkling,Mark A.
Song,Wen
Mendu,Nandini
출원인 / 주소
North Carolina State University
대리인 / 주소
Myers, Bigel, Sibley & Sajovec, P.A.
인용정보
피인용 횟수 :
2인용 특허 :
145
초록
DNA encoding a plant quinolate phosphoribosyl transferase (QPRTase) enzyme, and constructs comprising such DNA are provided. Methods of altering quinolate phosphoribosyl transferase expression are provided.
대표청구항▼
The invention claimed is: 1. An isolated nucleic acid molecule comprising a nucleotide sequence selected from the group consisting of: (a) the nucleotide sequence of SEQ ID NO:1; (b) nucleotide sequence that encodes a quinolate phosphoribosyl transferase enzyme having the amino acid sequence of SEQ
The invention claimed is: 1. An isolated nucleic acid molecule comprising a nucleotide sequence selected from the group consisting of: (a) the nucleotide sequence of SEQ ID NO:1; (b) nucleotide sequence that encodes a quinolate phosphoribosyl transferase enzyme having the amino acid sequence of SEQ ID NO:2; (c) a nucleotide sequence that is at least 95% identical to the nucleotide sequence of(a) or (b) above and that encodes a quinolate phosphoribosyl transferase enzyme; and (d) a nucleotide sequence that differs from the nucleotide sequence of (a) or (b) above due to the degeneracy of the genetic code and that encodes a quinolate phosphoribosyl transferase enzyme. 2. A nucleic acid construct comprising in the 5' to 3' direction, a promoter operable in a plant cell and the nucleic acid molecule of claim 1 positioned downstream from said promoter and operatively associated therewith. 3. A nucleic acid construct comprising in the 5' to 3' direction, a plant promoter and the nucleic acid molecule of claim 1 positioned downstream from said promoter and operatively associated therewith, said nucleic acid molecule in antisense orientation. 4. A nucleic acid construct comprising, in the 5' to 3' direction, a promoter operable in a plant cell and nucleic acid encoding a plant quinolate phosphoribosyl transferase, wherein the nucleic acid comprises the nucleotide sequence of SEQ ID NO:1 and wherein said nucleic acid is operably associated with said promoter. 5. A nucleic acid construct comprising, in the 5' to 3' direction, a promoter operable in a plant cell and nucleic acid encoding a plant quinolate phosphoribosyl transferase, wherein the nucleic acid comprises the nucleotide sequence of SEQ ID NO:1 in antisense orientation and wherein said nucleic acid is operably associated with said promoter. 6. The nucleic acid construct of any of claims 2, 3, 4, or 5, wherein the promoter is constitutively active in plant cells. 7. The nucleic acid construct of any of claims 2, 3, 4, or 5, wherein said promoter is selectively active in plant root tissue cells. 8. The nucleic acid construct of any of claims 2, 3, 4, or 5, wherein said promoter is selectively active in plant root cortex tissue cells. 9. A plasmid comprising the nucleic acid construct of any of claims 2, 3, 4, or 5. 10. A plant transformation vector comprising the nucleic acid construct of any of claims 2, 3, 4, or 5. 11. The plant transformation vector of claim 10, wherein the plant transformation vector is an Agrobacterium tumefaciens vector. 12. A plant cell comprising the nucleic acid construct of any of claims 2, 3, 4, or 5. 13. A transgenic plant comprising the plant cell of claim 12. 14. A method of making a transformed plant cell having reduced quinolate phosphoribosyl transferase (QPRTase) production, comprising: transforming a plant cell of a type known to produce quinolate phosphoribosyl transferase with an exogenous nucleic acid construct, which construct comprises, in the 5' to 3' direction, a promoter operable in a plant cell and a nucleotide sequence encoding quinolate phosphoribosyl transferase mRNA, said nucleotide sequence operably associated with said promoter and wherein said nucleotide sequence is the nucleotide sequence of claim 1, to produce a transformed plant cell, said transformed plant cell having reduced production of QPRTase as compared to an untransformed plant cell. 15. The method according to claim 14, wherein said nucleotide sequence encoding quinolate phosphoribosyl transferase mRNA is in antisense orientation. 16. The method according to claim 14, wherein said nucleic acid encoding quinolate phosphoribosyl transferase mRNA is in sense onentation. 17. The method of claim 14, wherein said plant cell is a Nicotiana tabacum plant cell. 18. The method according to claim 14, further comprising regenerating a plant from said transformed plant cell. 19. The method of claim 14, wherein said promoter is constitutively active. 20. The method according to claim 14, wherein said promoter is selectively active in plant root tissue cells. 21. The method according to claim 14, wherein said promoter is selectively active in plant root cortex tissue cells. 22. The method according to claim 14, wherein said transforming step is carried out by bombarding said plant cell with microparticles carrying said nucleic acid construct. 23. The method according to claim 14 wherein said transforming step is carried out by infecting said plant cell with an Agrobacterium tumefaciens vector containing a Ti plasmid carrying said nucleic acid construct. 24. A method of producing a transgenic tobacco seed, comprising collecting a transgenic seed from a transgenic tobacco plant produced by the method of claim 14. 25. A transgenic plant of the genus Nicotiana having reduced quinolate phosphoribosyl transferase (QPRTase) production relative to a non-transgenic control plant, said transgenic plant comprising transformed plant cells containing an exogenous nucleic acid construct comprising, in the 5' to 3' direction, a promoter operable in said plant cells and the nucleotide secjuence of claim 1, wherein said nucleotide sequence is operably associated with said promoter. 26. The transgenic plant of claim 25, wherein said nucleotide seciuence is in antisense orientation. 27. The transgenic plant of claim 25, wherein said nucleotide sequence is in sense orientation. 28. A transgenic plant of the genus Nicotiana having reduced quinolate phosphoribosyl transferase (QPRTase) production relative to a non-transgenic control plant, wherein said transgenic plant is a progeny of the transgenic plant of claim 25. 29. A transgenic seed of a transgenic plant of the genus Nicotiana having reduced quinolate phosphoribosyl transferase (QPRTase) production relative to a non transgenic control plant, wherein said transgenic plant is plant of claim 25 or a progeny thereof. 30. A crop comprising a plurality of the transgenic plant of claim 25 planted together in an agricultural field. 31. A method for reducing expression of a quinolate phosphoribosyl transferase gene in a plant cell, comprising: growing a plant cell transformed to contain an heterologous nucleic acid, wherein a transcribed strand of said heterologous nucleic acid is complementary to quinolate phosphoribosyl transferase mRNA endogenous to said cell and wherein said heterologous nucleic acid comprises the nucleotide seciuence of claim 1, whereby transcription of said heterologous nucleic acid reduces expression of said quinolate phosphoribosyl gene. 32. A method of producing a tobacco plant having a decreased level of nicotine in leaves of said tobacco plant, comprising: growing a tobacco plant, or progeny plants thereof, wherein said tobacco plant comprises plant cells containing a nucleic acid construct comprising a transcriptional initiation region functional in said plant cell and nucleic acid sequence operably joined to said transcriptional initiation region, wherein a transcribed strand of said nucleic acid sequence is complementary to endogenous quinolate phosphonbosyl transferase messenger RNA in said plant cells and wherein said nucleic acid sequence comprises the nucleotide sequence of claim 1.
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