Regulation of quinolate phosphoribosyl transferase expression
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C12N-015/52
C12N-015/54
C12N-015/82
A01H-005/00
A01H-005/10
출원번호
US-0748789
(2003-12-30)
등록번호
US-7408098
(2008-08-05)
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 :
0인용 특허 :
144
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▼
That which is claimed: 1. A method of making a transgenic tobacco plant cell having increased quinolate phosphoribosyl transferase (QPRTase) expression, said method comprising: transforming a tobacco plant cell with an exogenous nucleic acid construct, which construct comprises, in the 5' to 3' dir
That which is claimed: 1. A method of making a transgenic tobacco plant cell having increased quinolate phosphoribosyl transferase (QPRTase) expression, said method comprising: transforming a tobacco plant cell with an exogenous nucleic acid construct, which construct comprises, in the 5' to 3' direction, a promoter operable in a tobacco plant cell and a nucleotide sequence encoding a quinolate phosphoribosyl transferase comprising the amino acid sequence of SEQ ID NO:2, wherein said nucleotide sequence is operably associated with said promoter to produce transformed tobacco plant cells, said tobacco plant cells having increased expression of QPRTase compared to an untransformed tobacco plant cell. 2. The method of claim 1, wherein said tobacco plant cell is Nicotiana tabacum. 3. The method of claim 1, further comprising regenerating a tobacco plant from said transformed tobacco plant cell. 4. A method according to claim 1, wherein said promoter is constitutively active. 5. A method according to claim 1, wherein said promoter is selectively active in plant root tissue cells. 6. A method according to claim 1, wherein said promoter is selectively active in plant root cortex tissue cells. 7. A method according to claim 1, wherein said transforming step is carried out by bombarding said tobacco plant cell with microparticles carrying said nucleic acid construct. 8. A method according to claim 1 wherein said transforming step is carried out by infecting said tobacco plant cell with an Agrobacterium tumefaciens containing a Ti plasmid carrying said nucleic acid construct. 9. A method of producing transgenic tobacco seeds, comprising collecting transgenic seeds from a transgenic tobacco plant produced by the method of claim 1. 10. The method according to claim 1, wherein said nucleotide sequence comprises the nucleotide sequence of SEQ ID NO:1. 11. A transgenic plant of the genus Nicotiana having increased quinolate phosphoribosyl transferase (QPRTase) expression relative to a non-transformed control plant, said transgenic plant comprising transgenic plant cells containing: an exogenous nucleic acid construct comprising, in the 5' to 3' direction, a promoter operable in said plant cell and a nucleotide sequence encoding a plant quinolate phosphoribosyl transferase comprising the amino acid sequence of SEQ ID NO:2, said nucleotide sequence operably associated with said promoter; said plant exhibiting increased QPRTase expression compared to a non-transformed control plant. 12. The transgenic plant according to claim 11, wherein said nucleotide sequence comprises the nucleotide sequence of SEQ ID NO:1. 13. The transgenic plant according to claim 11, wherein said promoter is a constitutively active promoter. 14. The transgenic plant according to claim 11, wherein said promoter is selectively active in plant root tissue cells. 15. The transgenic plant according to claim 11 wherein said promoter is selectively active in plant root cortex tissue cells. 16. The transgenic plant according to claim 11, which plant is Nicotiana tabacum. 17. A transgenic plant of the genus Nicotiana having increased quinolate phosphoribosyl transferase (QPRTase) expression relative to a non-transformed control plant, wherein said transgenic plant is a progeny of a plant according to claim 11. 18. Seeds of a transgenic plant of the genus Nicotiana having increased quinolate phosphoribosyl transferase (QPRTase) expression relative to a non-transformed control plant, wherein said transgenic plant is a plant according to claim 11 or a progeny thereof. 19. A crop comprising a plurality of plants according to claim 11 planted together in an agricultural field. 20. A method for increasing expression of a quinolate phosphoribosyl transferase gene in a tobacco plant cell, said method comprising: growing a tobacco plant cell transformed to contain exogenous nucleic acid, wherein said exogenous nucleic acid encodes a quinolate phosphoribosyl transferase comprising the amino acid sequence of SEQ ID NO:2. 21. The method of claim 20, wherein said tobacco plant cell is a Nicotiana tabacum plant cell. 22. The method according to claim 20, wherein said transformed tobacco plant cell is obtained by a method comprising: integrating into the genome of a host tobacco plant cell a construct comprising, in the direction of transcription, a promoter functional in said plant cell, a nucleotide sequence encoding quinolate phosphoribosyl transferase comprising the amino acid sequence of SEQ ID NO:2, said nucleotide sequence operably associated with said promoter, and a transcriptional termination region functional in said tobacco plant cell, whereby a transformed tobacco plant cell is obtained. 23. A method according to claim 22, wherein said promoter is constitutively active. 24. A method according to claim 22 wherein said promoter is selectively active in plant root tissue cells. 25. A method according to claim 22, wherein said promoter is selectively active in plant root cortex tissue cells. 26. The method according to claim 20, wherein said nucleotide sequence comprises the nucleotide sequence of SEQ ID NO:1. 27. A method of producing a tobacco plant having an increased amount of nicotine in leaves of said tobacco plant, said method comprising: growing a tobacco plant, or progeny plants thereof, wherein said plant comprises cells containing a nucleic acid construct comprising a transcriptional initiation region functional in said plant and an exogenous nucleotide sequence operably joined to said transcriptional initiation region, wherein said nucleotide sequence encodes quinolate phosphoribosyl transferase comprising the amino acid sequence of SEQ ID NO:2. 28. The method according to claim 27, wherein said nucleotide sequence comprises the nucleotide sequence of SEQ ID NO:1.
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