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. 1984 Jun;158(3):967–971. doi: 10.1128/jb.158.3.967-971.1984

Expression of the Bacillus subtilis glutamine synthetase gene in Escherichia coli.

A L Gardner, A I Aronson
PMCID: PMC215536  PMID: 6144669

Abstract

The structural gene for glutamine synthetase (glnA) in Bacillus subtilis ( glnAB ) cloned in the lambda vector phage Charon 4A was used to transduce a lysogenic glutamine auxotrophic Escherichia coli strain to prototrophy. The defective E. coli gene ( glnAE ) was still present in the transductant since it could be transduced. In addition, curing of the prototroph resulted in the restoration of glutamine auxotrophy. Proteins in crude extracts of the transductant were examined by a "Western blotting" procedure for the presence of B. subtilis or E. coli glutamine synthetase antigen; only the former was detected. Growth of the strain in media without glutamine was not curtailed even when the bacteriophage lambda pL and pRM promoters were hyperrepressed . The specific activities and patterns of derepression of glutamine synthetase in the transductant were similar to those of B. subtilis, with no evidence for adenylylation. The information necessary for regulation of glnAB must be closely linked to the gene and appears to function in E. coli.

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Selected References

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