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Initiation of Translation

Initiation of Translation

Initiating translation is complex because it involves multiple molecules. Initiator tRNA, ribosomal subunits, and eukaryotic initiation factors (eIFs) are all required to assemble on the initiation codon of mRNA. This process consists of several steps that are mediated by different eIFs.
First, the initiator tRNA must be selected from the pool of elongator tRNAs by eukaryotic initiation factor 2 (eIF2). The initiator tRNA (Met-tRNAi) has conserved sequence elements including modified bases at...

Initiation of Translation

Initiation of Translation

Initiating translation is complex because it involves multiple molecules. Initiator tRNA, ribosomal subunits, and eukaryotic initiation factors (eIFs) are all required to assemble on the initiation codon of mRNA. This process consists of several steps that are mediated by different eIFs.
First, the initiator tRNA must be selected from the pool of elongator tRNAs by eukaryotic initiation factor 2 (eIF2). The initiator tRNA (Met-tRNAi) has conserved sequence elements including modified bases at...

Improving Translational Accuracy

Improving Translational Accuracy

Base complementarity between the three base pairs of mRNA codon and the tRNA anticodon is not a failsafe mechanism. Inaccuracies can range from a single mismatch to no correct base pairing at all. The free energy difference between the correct and nearly correct base pairs can be as small as 3 kcal/ mol. With complementarity being the only proofreading step, the estimated error frequency would be one wrong amino acid in every 100 amino acids incorporated. However, error frequencies observed in...

Translation in Prokaryotes

Translation in Prokaryotes

Prokaryote translation is a complex, highly coordinated process that converts genetic information from mRNA into functional proteins. It involves three stages: initiation, elongation, and termination, each facilitated by specific molecular components.Initiation of TranslationThe process begins with the assembly of the ribosomal subunits and initiation factors on the mRNA. In bacteria, the 30S ribosomal subunit recognizes the Shine-Dalgarno sequence in the mRNA, a conserved region upstream of...

Translation

Translation

Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life

Translation

Translation

Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life

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Related Experiment Video

Updated: Jul 7, 2026

An In Vitro Single-Molecule Imaging Assay for the Analysis of Cap-Dependent Translation Kinetics

An In Vitro Single-Molecule Imaging Assay for the Analysis of Cap-Dependent Translation Kinetics

Published on: September 15, 2020

In vitro translation.

R Jagus¹, B Joshi, S Miyamoto

¹Center of Marine Biotechnology and Greenebaum Cancer Center, Baltimore, Maryland, USA.

Current Protocols in Cell Biology

|January 30, 2008

Summary

This summary is machine-generated.

Rabbit reticulocyte and wheat germ systems enable in vitro translation of various mRNAs. These systems also support coupled transcription-translation and biotinylated protein capture for enhanced molecular analysis.

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In Vitro Transcribed RNA-based Luciferase Reporter Assay to Study Translation Regulation in Poxvirus-infected Cells

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An In Vitro Single-Molecule Imaging Assay for the Analysis of Cap-Dependent Translation Kinetics

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Published on: September 15, 2020

In Vitro Transcribed RNA-based Luciferase Reporter Assay to Study Translation Regulation in Poxvirus-infected Cells

In Vitro Transcribed RNA-based Luciferase Reporter Assay to Study Translation Regulation in Poxvirus-infected Cells

Published on: May 1, 2019

Area of Science:

Molecular Biology
Biochemistry

Background:

In vitro translation systems are crucial for protein synthesis studies.
Rabbit reticulocyte and wheat germ extracts are widely adopted for mRNA translation.

Purpose of the Study:

To summarize the applications of rabbit reticulocyte and wheat germ systems for in vitro translation.
To highlight advanced uses including coupled transcription-translation and protein capture.

Main Methods:

Utilizing rabbit reticulocyte lysate for protein synthesis.
Employing wheat germ extract for protein synthesis.
Performing coupled in vitro transcription and translation.
Incorporating biotinylated amino acids for protein labeling.

Main Results:

Both systems efficiently translate isolated or in vitro transcribed mRNAs.
A single reaction can achieve both mRNA transcription and translation.
Biotinylated amino acids facilitate protein capture via streptavidin-agarose.

Conclusions:

Rabbit reticulocyte and wheat germ systems offer versatile platforms for in vitro protein synthesis.
These systems can be adapted for advanced applications like coupled reactions and targeted protein isolation.