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. 1997 Sep;179(17):5448–5457. doi: 10.1128/jb.179.17.5448-5457.1997

An lrp-like gene of Bacillus subtilis involved in branched-chain amino acid transport.

B R Belitsky 1, M C Gustafsson 1, A L Sonenshein 1, C Von Wachenfeldt 1
PMCID: PMC179416  PMID: 9287000

Abstract

The azlB locus of Bacillus subtilis was defined previously by a mutation conferring resistance to a leucine analog, 4-azaleucine (J. B. Ward, Jr., and S. A. Zahler, J. Bacteriol. 116:727-735, 1973). In this report, azlB is shown to be the first gene of an operon apparently involved in branched-chain amino acid transport. The product of the azlB gene is an Lrp-like protein that negatively regulates expression of the azlBCDEF operon. Resistance to 4-azaleucine in azlB mutants is due to overproduction of AzlC and AzlD, two novel hydrophobic proteins.

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Selected References

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