BIO 2306 Lecture Notes - Lecture 16: Regulator Gene, Operon, Cyclic Adenosine Monophosphate
Document Summary
Gene regulation mechanisms and systems that control of gene expression environmental induction of gene expression. Structural genes encode proteins used in cell metabolism or structure. Regulatory genes encode proteins that regulate transcription/translation. Regulatory elements sequences not transcribed, but involved in regulation other sequences. Set of structural genes and sequences that regulate expression. Regulator gene not apart of the operon but affects operon. Binds to dna and turns transcription off. Inducible transcription is normally off and must be turned on (induced) Repressible transcription is normally on and must be turned off (repressed) Regulator protein is active and must be made inactive to allow transcription. Made inactive by an inducer that binds to the repressor which prevents it from binding to the operon. Regulator protein is inactive and must be made active to prevent transcription. Opposite in that when inducer is present it allows repressor to bind to operator.