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báo cáo khoa học: " Characterisation of the tryptophan synthase alpha subunit in maize"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Characterisation of the tryptophan synthase alpha subunit in maize | BMC Plant Biology BioMed Central Research article Open Access Characterisation of the tryptophan synthase alpha subunit in maize Verena Kriechbaumer1 Linda Weigang2 Andreas Fiefielmann1 Thomas Letzel2 Monika Frey1 Alfons Gierl1 and Erich Glawischnig 1 Address 1Lehrstuhl fur Genetik Technische Universitat Munchen D-85350 Freising Germany and 2Analytische Forschungsgruppe des Lehrstuhls fur Chemie der Biopolymere Technische Universitat Munchen D-85350 Freising Germany Email Verena Kriechbaumer - verena.kriechbaumer@wzw.tum.de Linda Weigang - L.Weigang@lrz.tu-muenchen.de Andreas Fiefielmann - a.fiesselmann@wzw.tum.de Thomas Letzel - T.Letzel@lrz.tu-muenchen.de Monika Frey - monika.frey@wzw.tum.de Alfons Gierl - gierl@wzw.tum.de Erich Glawischnig - egl@wzw.tum.de Corresponding author Published 22 April 2008 Received 6 February 2008 BMC Plant Biology 2008 8 44 doi 10.1186 1471-2229-8-44 Accepted 22 April 2008 This article is available from http www.biomedcentral.cOm 1471-2229 8 44 2008 Kriechbaumer et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http creativecommons.org licenses by 2.0 which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background In bacteria such as Salmonella typhimurium tryptophan is synthesized from indole-3-glycerole phosphate IGP by a tryptophan synthase aPPa heterotetramer. Plants have evolved multiple a TSA and P 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. Results In order to clarify how tryptophan is synthesized in maize two TSA homologs hitherto uncharacterized ZmTSA and ZmTSAlike were functionally analyzed.