Transcriptional processing of the pst operon of Escherichia coli.
The pst operon of Escherichia coli is composed of five genes that encode a high-affinity phosphate transport system. pst belongs to the PHO regulon, which is a group of genes and operons that are induced in response to phosphate limitation. The pst operon also has a regulatory role in the repression of PHO genes' transcription under phosphate excess conditions. Transcription of pst is initiated at the promoter located upstream to the first gene, pstS. Immediately after its synthesis, the primary transcript of pst is cleaved into shorter mRNA molecules in a ribonuclease E-dependent manner. Other ribonucleases, such as RNase III and MazF, do not play a role in pst mRNA processing. RNase E is thus at least partially responsible for processing the pst primary transcript.
Aguena
Meire
M
Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, Av. Prof. Lineu Prestes, 1374, São Paulo, SP CEP 05508-900, Brazil.
Spira
Beny
B
D004926:Escherichia coli / Q000235:genetics* / Q000378:metabolism; D029968:Escherichia coli Proteins / Q000235:genetics / Q000378:metabolism; D015964:Gene Expression Regulation, Bacterial; D009876:Operon; D010710:Phosphates / Q000378:metabolism*; D014158:Transcription, Genetic
D029968:Escherichia coli Proteins; D010710:Phosphates