Claims
- 1. In a method for the transformation and regeneration of transgenic plants, the improvement which comprises the use of a glyphosate-resistance marker gene comprising:
- i) a promoter which functions in plant cells to cause the production of an RNA sequence,
- ii) a structural DNA sequence that causes the production of an RNA sequence which encodes an EPSPS enzyme having the sequence domains:
- -R-X.sub.1 -H-X.sub.2 -E- (SEQ ID NO:37), in which
- X.sub.1 is G, S, T, C, Y, N, Q, D or E;
- X.sub.2 is S or T; and
- -G-D-K-X.sub.3 - (SEQ ID NO:38), in which
- X.sub.3 is S or T; and
- -S-A-Q-X.sub.4 -K- (SEQ ID NO:39), in which
- X.sub.4 is A, R, N, D, C, Q, E, G, H, I, L, K, M, F, P, S, T, W, Y or V; and
- -N-X.sub.5 -T-R- (SEQ ID NO:40), in which
- X.sub.5 is A, R, N, D, C, Q, E, G, H, I, L, K, M, F, P, S, T, W, Y or V;
- and
- iii) a 3' non-translated DNA sequence which functions in plant cells to cause the addition of a stretch of polyadenyl nucleotides to the 3' end of the RNA sequence;
- where the promoter is heterologous with respect to the structural DNA sequence and adapted to cause sufficient expression of the polypeptide to render a plant cell transformed with the DNA molecule tolerance to a toxic level of glyphosate.
- 2. A method of claim 1 in which X.sub.1 is D or N; X.sub.2 is S or T; X.sub.3 is S or T; X.sub.4 is V, I or L; and X.sub.5 is P or Q.
- 3. A method of claim 2 in which the structural DNA sequence encodes an EPSPS enzyme selected from the group consisting of SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, SEQ ID NO:41 and SEQ ID NO:43.
- 4. A method of claim 1 in which the structural DNA sequence encodes a fusion polypeptide comprising an amino-terminal chloroplast transit peptide and the EPSPS enzyme.
- 5. A method of claim 4 in which X.sub.1 is D or N; X.sub.2 is S or T; X.sub.3 is S or T; X.sub.4 is V, I or L; and X.sub.5 is P or Q.
- 6. A method of claim 5 in which the structural DNA sequence encodes an EPSPS enzyme selected from the group consisting of SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, SEQ ID NO:42 and SEQ ID NO:44.
- 7. A method of claim 1 in which the EPSPS enzyme is that set forth in SEQ ID NO:3.
- 8. A method of claim 7 in which the promoter is selected from the group consisting of CaMV35S and FMV35S promoters.
Parent Case Info
This is a continuation of copending application Ser. No. 08/306,063, filed Sep. 13, 1994, which is a continuation in part of application Ser. No. 749,611, filed Aug. 28, 1991, now abandoned, which is a continuation in part of application Ser. No. 07/576,537, filed Aug. 31, 1990, now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4769061 |
Comei |
Sep 1988 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
193259 |
Sep 1986 |
EPX |
Non-Patent Literature Citations (5)
Entry |
Potrykus (Jun. 1990) Bio/Technology 8:535-542. |
Henner et al. (1986) Gene 49: 147-152. |
Fitzgibbon (Dec. 1988) Ph.D. Thesis University Microfilms International, (1989). |
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Continuations (1)
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Number |
Date |
Country |
Parent |
306063 |
Sep 1994 |
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Continuation in Parts (2)
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Number |
Date |
Country |
Parent |
749611 |
Aug 1991 |
|
Parent |
576537 |
Aug 1990 |
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