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Ribosomal RNA Synthesis02:53

Ribosomal RNA Synthesis

Ribosome synthesis is a highly complex and coordinated process involving more than 200 assembly factors. The synthesis and processing of ribosomal components occurs not only in the nucleolus but also in the nucleoplasm and the cytoplasm of eukaryotic cells.
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...
Ribosomal RNA Synthesis02:53

Ribosomal RNA Synthesis

Ribosome synthesis is a highly complex and coordinated process involving more than 200 assembly factors. The synthesis and processing of ribosomal components occurs not only in the nucleolus but also in the nucleoplasm and the cytoplasm of eukaryotic cells.
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...
Regulated mRNA Transport02:22

Regulated mRNA Transport

In eukaryotes, transcription and translation are compartmentalized; an mRNA is first synthesized in the nucleus and then selectively transported to the cytoplasm for protein synthesis. Before transport, a pre-mRNA undergoes several steps of post-transcriptional modifications including splicing, 5' capping, and the addition of a poly-adenine tail. Various proteins bind to the pre-mRNA during these modifications. The mRNA transport takes place with the help of multiple proteins playing specific...
Regulated mRNA Transport02:22

Regulated mRNA Transport

In eukaryotes, transcription and translation are compartmentalized; an mRNA is first synthesized in the nucleus and then selectively transported to the cytoplasm for protein synthesis. Before transport, a pre-mRNA undergoes several steps of post-transcriptional modifications including splicing, 5' capping, and the addition of a poly-adenine tail. Various proteins bind to the pre-mRNA during these modifications. The mRNA transport takes place with the help of multiple proteins playing specific...
Types of RNA01:20

Types of RNA

Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in regulating gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA Performs Diverse...
Types of RNA01:23

Types of RNA

Overview
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...

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Related Experiment Video

Updated: Jul 16, 2026

A Rapid High-throughput Method for Mapping Ribonucleoproteins (RNPs) on Human pre-mRNA
13:00

A Rapid High-throughput Method for Mapping Ribonucleoproteins (RNPs) on Human pre-mRNA

Published on: December 2, 2009

Ribonucleoprotein remodeling during RNA localization.

Raymond A Lewis1, Kimberly L Mowry

  • 1Department of Molecular Biology, Cell Biology and Biochemistry, Brown University, Providence, RI 02912, USA.

Differentiation; Research in Biological Diversity
|March 27, 2007
PubMed
Summary

Cytoplasmic RNA localization directs protein production to specific cell areas. This process involves RNA-protein complexes (RNPs) and dynamic interactions during transport to create cellular polarity.

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Last Updated: Jul 16, 2026

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Genetics

Background:

  • Cytoplasmic RNA localization establishes cell polarity by spatially restricting protein synthesis.
  • This process relies on ribonucleoprotein (RNP) complexes, comprising RNA and associated proteins.
  • RNPs are transported, often in a translationally repressed state, to specific subcellular destinations.

Purpose of the Study:

  • To identify cis- and trans-acting factors involved in RNA localization.
  • To elucidate the dynamic RNA-protein interactions during the localization process.

Main Methods:

  • Analysis of cis-acting sequences within RNA molecules.
  • Identification of specific trans-acting protein factors that bind to RNA.
  • Characterization of ribonucleoprotein (RNP) complex composition.
  • Investigation of RNP transport mechanisms and translational regulation.

Main Results:

  • Identification of key cis- and trans-factors governing RNA localization.
  • Elucidation of remodeling events in RNA-protein interactions during transport.
  • Understanding the role of RNP complexes in spatial gene expression.

Conclusions:

  • RNA localization is a complex, regulated mechanism essential for cellular organization.
  • Dynamic remodeling of RNA-protein interactions is crucial for successful localization.
  • Further research into these interactions will enhance understanding of cell polarity and development.