Does post-translational modification occur in eukaryotes?
Table of Contents
- 1 Does post-translational modification occur in eukaryotes?
- 2 What organelle does protein modification?
- 3 What organelle is involved in post-translational modification of proteins?
- 4 What modifications occur in the Golgi?
- 5 Where does post translational modification occur MCAT Reddit?
- 6 Why does post-translational modification occur?
Does post-translational modification occur in eukaryotes?
Protein acetylation is a common post-translational modification in eukaryotes and involves the addition of an acetyl group to nitrogen via reversible and irreversible processes.
What organelle does protein modification?
The Golgi apparatus
The Golgi apparatus is a cellular organelle responsible for the modification and trafficking of proteins to other organelles such as the lysosome, the digestive organelle of the cell.
Where do post-translational modifications occur MCAT?
Many post-translational modifications happen in the endoplasmic reticulum and the Golgi apparatus.
Where do post-transcriptional modifications occur?
Post-transcriptional modifications of pre-mRNA, such as capping, splicing, and polyadenylation, take place in the nucleus. After these modifications have been completed, the mature mRNA molecules have to be translocated into the cytoplasm, where protein synthesis occurs.
What organelle is involved in post-translational modification of proteins?
The Golgi apparatus functions as a molecular assembly line in which membrane proteins undergo extensive post-translational modification. Many Golgi reactions involve the addition of sugar residues to membrane proteins and secreted proteins.
What modifications occur in the Golgi?
The Golgi enzymes catalyze the addition or removal of sugars from cargo proteins (glycosylation), the addition of sulfate groups (sulfation), and the addition of phosphate groups (phosphorylation). Cargo proteins are modified by enzymes (called resident enzymes) located within each cisterna.
What modifications does the Golgi apparatus do?
The Golgi apparatus is a cellular organelle responsible for the modification and trafficking of proteins to other organelles. Proteins translated within the rough endoplasmic reticulum are transferred to the Golgi. From there they are modified and packaged into vesicles for distribution.
What organelle is involved in post translational modification of proteins?
Where does post translational modification occur MCAT Reddit?
Post translational modifications occur in the endoplasmic reticulum/Golgi apparatus and include addition of carbohydrates/lipids to proteins and things of this nature, actual modifications to the protein from the already translated mRNA.
Why does post-translational modification occur?
Post-translational modification can occur at any step in the “life cycle” of a protein. For example, many proteins are modified shortly after translation is completed to mediate proper protein folding or stability or to direct the nascent protein to distinct cellular compartments (e.g., nucleus, membrane).
Does post-transcriptional modifications occur in prokaryotes?
RNAs from eukaryotes undergo post-transcriptional modifications including: capping, polyadenylation, and splicing. These events do not occur in prokaryotes. mRNAs in prokaryotes tend to contain many different genes on a single mRNA meaning they are polycystronic.
Where do post transcriptional modifications occur?