title: TyrT operon
text: # TyrT operon
  
  The tyrT operon is a series of genes encoding the tRNA for tyrosine in Escherichia coli. It is activated in response to amino acid starvation.
  
  ## Components
  
  The tyrT operon consists of an upstream activation sequence, the gene for the tyrosine tRNA called $tRNA_1^{Tyr},$ and an RNA called rtT RNA which has an unknown function.
  
  ## Regulation
  
  Transcription of the tyrT operon is activated by the stringent response. Binding of the FIS protein to the operon's upstream activation sequence tightly bends the DNA, promoting transcription.
  
  