Knock-out mutants from an En-1 mutagenized Arabidopsis thaliana population generate phenylpropanoid biosynthesis phenotypes

Wisman E, Hartmann U, Sagasser M, Baumann E, Palme K, Hahlbrock K, Saedler H, Weisshaar B (1998)
Proceedings of the National Academy of Sciences of the United States of America 95(21): 12432-12437.

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Abstract
A collection of 8,000 Arabidopsis thaliana plants carrying 48,000 insertions of the maize transposable element En-1 has been generated. This population was used for reverse genetic analyses to identify insertions in individual gene loci. By using a PCR-based screening protocol, insertions were found in 55 genes. En-1 showed no preference for transcribed or untranscribed regions nor for a particular orientation relative to the gene of interest. In several cases, En-1 was inserted within a few kilobases upstream or downstream of the gene. En-1 was mobilized from such positions into the respective gene to cause gene disruption. Knock-out alleles of genes involved in flavonoid biosynthesis were generated. One mutant line contained an En-1 insertion in the flavonol synthase gene (FLS) and showed drastically reduced levels of kaempferol. Allelism tests with other lines containing En-1 insertions in the flavanone 3-hydroxylase gene (F3H) demonstrated that TRANSPARENT TESTA 6 (TT6) encodes flavanone 3-hydroxylase. The f3h and fls null mutants complete the set of A. thaliana lines defective in early steps of the flavonoid pathway. These experiments demonstrate the efficiency of the screening method and gene disruption strategy used for assigning functions to genes defined only by sequence.
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Wisman E, Hartmann U, Sagasser M, et al. Knock-out mutants from an En-1 mutagenized Arabidopsis thaliana population generate phenylpropanoid biosynthesis phenotypes. Proceedings of the National Academy of Sciences of the United States of America. 1998;95(21):12432-12437.
Wisman, E., Hartmann, U., Sagasser, M., Baumann, E., Palme, K., Hahlbrock, K., Saedler, H., et al. (1998). Knock-out mutants from an En-1 mutagenized Arabidopsis thaliana population generate phenylpropanoid biosynthesis phenotypes. Proceedings of the National Academy of Sciences of the United States of America, 95(21), 12432-12437.
Wisman, E., Hartmann, U., Sagasser, M., Baumann, E., Palme, K., Hahlbrock, K., Saedler, H., and Weisshaar, B. (1998). Knock-out mutants from an En-1 mutagenized Arabidopsis thaliana population generate phenylpropanoid biosynthesis phenotypes. Proceedings of the National Academy of Sciences of the United States of America 95, 12432-12437.
Wisman, E., et al., 1998. Knock-out mutants from an En-1 mutagenized Arabidopsis thaliana population generate phenylpropanoid biosynthesis phenotypes. Proceedings of the National Academy of Sciences of the United States of America, 95(21), p 12432-12437.
E. Wisman, et al., “Knock-out mutants from an En-1 mutagenized Arabidopsis thaliana population generate phenylpropanoid biosynthesis phenotypes”, Proceedings of the National Academy of Sciences of the United States of America, vol. 95, 1998, pp. 12432-12437.
Wisman, E., Hartmann, U., Sagasser, M., Baumann, E., Palme, K., Hahlbrock, K., Saedler, H., Weisshaar, B.: Knock-out mutants from an En-1 mutagenized Arabidopsis thaliana population generate phenylpropanoid biosynthesis phenotypes. Proceedings of the National Academy of Sciences of the United States of America. 95, 12432-12437 (1998).
Wisman, Ellen, Hartmann, Ulrike, Sagasser, Martin, Baumann, Elvira, Palme, Klaus, Hahlbrock, Klaus, Saedler, Heinz, and Weisshaar, Bernd. “Knock-out mutants from an En-1 mutagenized Arabidopsis thaliana population generate phenylpropanoid biosynthesis phenotypes”. Proceedings of the National Academy of Sciences of the United States of America 95.21 (1998): 12432-12437.
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