Characterisation of the tryptophan synthase alpha subunit in maize |
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| Authors: | Verena Kriechbaumer Linda Weigang Andreas Fießelmann Thomas Letzel Monika Frey Alfons Gierl Erich Glawischnig |
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| Affiliation: | 1.Lehrstuhl für Genetik,Technische Universit?t München,Freising,Germany;2.Analytische Forschungsgruppe des Lehrstuhls für Chemie der Biopolymere,Technische Universit?t München,Freising,Germany |
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| Abstract: | Background In bacteria, such as Salmonella typhimurium, tryptophan is synthesized from indole-3-glycerole phosphate (IGP) by a tryptophan synthase αββα heterotetramer. Plants have evolved multiple α (TSA) and β (TSB) homologs, which have probably diverged in biological function and their ability of subunit interaction. There is some evidence for a tryptophan synthase (TS) complex in Arabidopsis. On the other hand maize (Zea mays) expresses the TSA-homologs BX1 and IGL that efficiently cleave IGP, independent of interaction with TSB. |
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