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Structure and properties of an engineered transketolase from maize

Gerhardt, Stefan, Echt, Stefanie, Busch, Marco, Freigang, Jorg, Auerbach, Gunter, Bader, Gerd, Martin, William F,, Bacher, Adelbert, Huber, Robert and Fischer, Markus 2003. Structure and properties of an engineered transketolase from maize. Plant Physiology 132 (4) , pp. 1941-1949. 10.1104/pp.103.020982

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Abstract

The gene specifying plastid transketolase (TK) of maize (Zea mays) was cloned from a cDNA library by southern blotting using a heterologous probe from sorghum (Sorghum bicolor). A recombinant fusion protein comprising thioredoxin of Escherichia coli and mature TK of maize was expressed at a high level in E. coli and cleaved with thrombin, affording plastid TK. The protein in complex with thiamine pyrophoshate was crystallized, and its structure was solved by molecular replacement. The enzyme is a C2 symmetric homodimer closely similar to the enzyme from yeast (Saccharomyces cerevisiae). Each subunit is folded into three domains. The two topologically equivalent active sites are located in the subunit interface region and resemble those of the yeast enzyme.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Subjects: Q Science > QK Botany
Q Science > QP Physiology
Publisher: American Society of Plant Biologists
ISSN: 0032-0889
Last Modified: 24 Jun 2017 11:00
URI: http://orca-mwe.cf.ac.uk/id/eprint/70182

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