Kozak’s rules

Definition

Kozak's rules describe the optimal sequence of nucleotides surrounding the start codon (AUG) in eukaryotic mRNA for efficient translation initiation. The consensus sequence is gccRccAUGG, where R is a purine (adenine or guanine).

5 Must Know Facts For Your Next Test

1. The Kozak sequence helps ribosomes identify the correct start codon for protein synthesis.
2. The 'R' in the Kozak sequence stands for a purine base, which can be either adenine (A) or guanine (G).
3. A strong match to the Kozak consensus sequence enhances translation efficiency.
4. Mutations in the Kozak sequence can affect protein synthesis and lead to diseases.
5. Marilyn Kozak first described these rules in 1986, significantly advancing our understanding of eukaryotic translation.

Related terms

Start Codon:

The AUG triplet in mRNA that signals the beginning of translation.

Translation Initiation Complex: The assembly of ribosomal subunits, mRNA, and initiator tRNA required to begin protein synthesis.

Eukaryotic mRNA: Messenger RNA that carries genetic information from DNA to ribosomes for protein synthesis in eukaryotic cells.