| GenProp0456 |
attenuation system: tryptophanase~This property is characterized by two components. One is the enzyme tryptophanase, capabable of degrading tryptophan. The other is the tryptophanase leader peptide, TnaC, encoded upstream of the enzyme. The ribosome that translates the leader peptide may stall at either of two points: the trp codon (when trp is scarce) or the stop codon. The leader peptide may interact with ribosome to delay release at its stop codon. Whether the ribosome stalls at the trp codon or continues to the stop codon controls what mRNA secondary structure may form as trytophanase message is synthesized. When trp is scarce, and the enzyme should not made, a terminator forms and transcription ends. Examples of this mechanism for controlling transcription at termination are called transcriptional attenuation. |
None - {{∅}} |
None - {{∅}} |
Unexplained |
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