Regulation of aromatic amino acid transport systems in Escherichia coli K-12.
AUTOR(ES)
Whipp, M J
RESUMO
The regulation of the aromatic amino acid transport systems was investigated. The common (general) aromatic transport system and the tyrosine-specific transport system were found to be subject to repression control, thus confirming earlier reports. In addition, tryosine- and tryptophan-specific transport were found to be enhanced by growth of cells with phenylalanine. The repression and enhancement of the transport systems was abolished in a strain carrying an amber mutation in the regulator gene tyrR. This indicates that the tyrR gene product, which was previously shown to be involved in regulation of aromatic biosynthetic enzymes, is also involved in the regulation of the aromatic amino acid transport systems.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=221884Documentos Relacionados
- Aromatic amino acid biosynthesis: regulation of shikimate kinase in Escherichia coli K-12.
- Regulation of Aromatic Amino Acid Biosynthesis in ESCHERICHIA COLI K12
- Mapping of two loci affecting the regulation of branched-chain amino acid transport in Escherichia coli K-12.
- L-arabinose transport systems in Escherichia coli K-12.
- Formation of Aromatic Amino Acid Pools in Escherichia coli K-12