Algae, Tree, Herbs, Bush, Shrub, Grasses, Vines, Fern, Moss, Spermatophyta, Bryophyta, Fern Ally, Flower, Photosynthesis, Eukaryote, Prokaryote, carbohydrate, vitamins, amino acids, botany, lipids, proteins, cell, cell wall, biotechnology, metabolities, enzymes, agriculture, horticulture, agronomy, bryology, plaleobotany, phytochemistry, enthnobotany, anatomy, ecology, plant breeding, ecology, genetics, chlorophyll, chloroplast, gymnosperms, sporophytes, spores, seed, pollination, pollen, agriculture, horticulture, taxanomy, fungi, molecular biology, biochemistry, bioinfomatics, microbiology, fertilizers, insecticides, pesticides, herbicides, plant growth regulators, medicinal plants, herbal medicines, chemistry, cytogenetics, bryology, ethnobotany, plant pathology, methodolgy, research institutes, scientific journals, companies, farmer, scientists, plant nutrition
Select Language:
 
 
 
 
Main Menu
Please click the main subject to get the list of sub-categories
 
Services offered
 
 
 
 
  Section: General Cell & Molecular Biology » Translation
 
 
Please share with your friends:  
 
 

Translation in Eukaryotes

 
     
 
Content
Translation
     ⇒ The Genetic Code
     ⇒ Translation in Prokaryotes
     ⇒ Translation in Eukaryotes



The process of translation in eukaryotes is essentially the same as that in bacteria, but differs in several important ways. Structurally, the ribosomal subunits of eukaryotes consist of 40S and 60S subunits that together form an 80S complex. Although most bacterial mRNAs specify multiple proteins, eukaryotic mRNAs code for a single nascent polypeptide chain. However, some newly synthesized polypetide chains may subsequently be enzymatically cleaved into two or more functional protein components.




Only three well-defined initiation factors are required for translation of E. coli mRNAs, but many more are needed in eukaryotes. During initiation, a special initiator tRNA (tRNAiMet) brings an unformylated methionine into the first position on the ribosome. In eukaryotes the 40S ribosomal subunit is thought to attach at the capped 5' terminus rather than at a Shine-Dalgarno sequence as in prokaryotes. It then slides along until it reaches the first AUG start codon. Three different elongation factors in eukaryotes replace those found in bacteria. However, a single release factors acts in eukaryotes.
 
     
 
 
     



     
 
Copyrights 2012 © Biocyclopedia.com | Disclaimer