What are 4 mechanisms of post-transcriptional regulation?
Post-transcriptional factors include: RNA-binding proteins (RBPs), ribosomal proteins (RPs), micro-RNAs (miRNAs), and long non-coding RNAs (lncRNAs). Recent evidence that will be presented here suggests that these factors also play a crucial role in the generation of the neocortical layers.
What are two post-transcriptional mechanisms for regulation?
These two mechanisms are intrinsic termination and factor-dependent termination. – In the intrinsic termination mechanism, also known as Rho-independent termination, the RNA chain forms a stable transcript hairpin structure at the 3’end of the genes that cause the RNA polymerase to stop transcribing.
What is involved in post-transcriptional control?
Post-transcriptional control can occur at any stage after transcription, including RNA splicing, nuclear shuttling, and RNA stability. Once RNA is transcribed, it must be processed to create a mature RNA that is ready to be translated. This involves the removal of introns that do not code for protein.
What are the three types of post-transcriptional processing?
In this section, we will discuss the three processes that make up these post- transcriptional modifications: 5′ capping, addition of the poly A tail, and splicing.
What are transcriptional mechanisms?
Appropriate regulation of mRNA transcription is central to the differentiation and functions of eukaryotic cells, and to the development of complex organisms. mRNAs are synthesized by the coordinated action of a set of general transcription and mRNA modification factors.
Which of the following is an example of a post-transcriptional regulation mechanism?
Answer: c. The removal of introns and alternative splicing of exons is an example of post-transcriptional control of gene expression.
What is an example of post-transcriptional regulation?
Even after a gene has been transcribed, gene expression can still be regulated at various stages. A protein’s activity may be regulated after translation, for example, through removal of amino acids or addition of chemical groups.
What are different post mechanisms?
A plethora of PTMs have currently been described, including phosphorylation, acetylation, glycosylation, methylation, ubiquitylation, sumoylation, myristoylation, and S-nitrosylation. Currently, the human protein reference database contains more than 30,000 protein entries and more than 93,000 PTM sites.
Where does post-transcriptional regulation occur?
RNA processing
2.1. 3 Post-transcriptional processing. Post-transcriptional regulation may occur at the level of RNA processing, RNA transport, and post-transcriptional modifications. Proteins that may be involved in the regulation of RNA processing are the protein-containing ribonucleoprotein (RNP) domains.
Where does transcriptional regulation occur?
Prokaryotic transcription and translation occur simultaneously in the cytoplasm, and regulation occurs at the transcriptional level. Eukaryotic gene expression is regulated during transcription and RNA processing, which take place in the nucleus, and during protein translation, which takes place in the cytoplasm.
Where does post-transcriptional modification occur?
nucleus
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.