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. 1981 Oct 24;9(20):5187–5202. doi: 10.1093/nar/9.20.5187

Expression of plant tumor-specific proteins in minicells of Escherichia coli: a fusion protein of lysopine dehydrogenase with chloramphenicol acetyltransferase.

J Schröder, A Hillebrand, W Klipp, A Pühler
PMCID: PMC327514  PMID: 6117827

Abstract

Fragment EcoRI 7 from Ti-plasmid pTi Ach5, a part of the T-DNA in octopine tumors, was cloned in both orientations into pACYC184 and expressed in E. coli minicells. The cells synthesized four proteins from four different coding regions on EcoRI 7. Two of the proteins (Mr 25.000 and 26.000) were expressed with promoters from the Ti-plasmid fragment, while transcription for the two other proteins (Mr 18.000 and 74.000) started with a promoter on pACYC184. The Mr 18.000 protein represented a fusion product between chloramphenicol acetyltransferase (CAT) on pACYC184 and a part of lysopine dehydrogenase (LpDH), the enzyme synthesizing octopine and lysopine in plant tumor cells. The results suggest that E. coli minicells are a valuable system to study the proteins coded for by the T-region of Ti-plasmids.

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Selected References

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