Eukaryotic Gene regulation

Transcription factors

Transcription factors

proteins to control gene regulation with

What do transcription factors ensure?

It ensures that a gene is used at the right time and that proteins are made in the right amounts

Two main sets of transcription factors

One set forms complexes that guide and stabilize the binding of the RNA polymerase to the promoter

What is the other set?

Incudes regulatory proteins that help control the rate of transcription

Repressor proteins

bind to specific sites on DNA and prevent the binding of activators

What is DNA wrapped around

histones to form nucleosomes

Hox genes

group of genes that controls differentiation

What are they important for?

determing the body plan of an organism

Homebox genes code for

transcription factors and are activein the zones of the embryo in the same order as the genes on the chromosomes

What happens wen there is a mutation in hox genes

Can affect the order of structures along this axi

RNA intereference

small pieces of double stranded RNA in the cytoplasm of the cell are cut by an enzyme called dicer

Interfering RNA

reulting double stranded segments

What do they bind to?

sequence specific sections of mRNA in the cyoplasm, causing the mRNA in this region to be cut and prevneting its translation