BIOL 2301 Lecture 10: Prokaryotic Gene Regulation

• School: Northeastern University
• Department: Biology
• Course: BIOL 2301
• Professor: Christopher Richardson

Document Summary

Gene expression using the information stored in dna to produce rna and protein molecules that determine the phenotype of. Aporepressoriaproteinthathasno dna binding activity onitsown but which requires the presence ofacorepressorto transcription off. Presence afthefinalproductlaftentheco . repressor signals to produce specific cell types and to respond to changing environmental conditions: nutrient & temperature conditions do affect, gene regulation controls in prokaryotes expression gene tothecellthattheenzymesarehot needed anymore. In positive regulation , atranscriptional activator canbindsiturngene expression "oi a. What genes are expressed indifferent nutrient conditions or ii. Howlongwillthethnalastbeforeit"s degraded di a. the lack of the inducer keeps the transcription stateinthedefaultstateafsoffnor not accelerating. "( low levels of transcription ) inducerbindstoactivatortoturn transcription on "a up iii. isat bind level. An activator cannot to dna unless activator is bound to over gone expression. In bacteria ,on - affgeneactivityisaften controlled through protein. E gene autoregulation smallamountafthegoneisalmostalwaysexpressedov ismorclikeadimmerswitohthananonloff level of transcription :a actually meansalow turning transcription not accelerating off "or" notup keeps transcription inthedefanltstateaf transcription.