Release Factors
Release Factors - Related Videos
09:29
Electrospinning Growth Factor Releasing Microspheres into Fibrous Scaffolds
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Cited by 10 •
2014
This protocol combines electrospinning and microspheres to develop tissue engineered scaffolds to direct neurons. Nerve growth factor was encapsulated within PLGA microspheres and electrospun into Hyaluronic Acid (HA) fibrous scaffolds. The protein bioactivity was tested by seeding the scaffolds with primary chick Dorsal Root Ganglia and culturing for 4-6 days.
01:20
Modified-Release Drug Delivery Systems: Influencing Factors
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2026
Modified-release drug delivery systems are designed to optimize the therapeutic effect of drugs by minimizing side effects, reducing the dosage required, and controlling drug release to align with pharmacokinetic and pharmacodynamic needs. The system depends on two key factors: the drug's release from the formulation and its movement through the body to the target site. Unlike conventional dosage forms, where absorption is the limiting step, the rate of drug release is the key determinant in...
09:20
Single-Cell Factor Localization on Chromatin using Ultra-Low Input Cleavage Under Targets and Release using Nuclease
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Cited by 6 •
2022
CUT&RUN and its variants can be used to determine protein occupancy on chromatin. This protocol describes how to determine protein localization on chromatin using single-cell uliCUT&RUN.
02:16
Transcription Factors
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2019
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
02:35
Transcription Elongation Factors
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2020
Transcription elongation is a dynamic process that alters depending upon the sequence heterogeneity of the DNA being transcribed. Hence, it is not surprising that the elongation complex's composition also varies along the way while transcribing a gene. The transcription elongation is regulated via pausing of RNA polymerase on several occasions during transcription. In bacteria, these halts are necessary because the transcription of DNA into mRNA is coupled to the translation of that mRNA into a...
FAQs
The bacterial arrangement uses RF1 and RF2, whereas eukaryotic translation uses eRF1, a factor capable of recognizing all three stop codons. This difference provides a useful comparison for studying how organisms organize termination signals and associated translation components. It also helps researchers interpret whether a termination mechanism reflects bacterial or eukaryotic biology.
Recognition alone does not free the nascent chain. After a stop codon is encountered, the release factor positions catalytic elements in the peptidyl transferase center, where hydrolysis breaks the bond connecting the polypeptide to its transfer RNA. This spatial coupling links accurate stop-codon recognition to efficient completion of protein synthesis.
Stop-codon recognition determines where synthesis ends, so its coordination with peptide-bond hydrolysis helps prevent inappropriate continuation of the polypeptide. Because release factors connect decoding with chemical release, they are useful for investigating translation accuracy and the control of protein production. Changes affecting this step can therefore influence gene expression.
Associated factors help recycle the ribosome after termination, returning the translation machinery to a state that can participate in further protein synthesis. This places release factors within a larger termination-and-recycling process rather than treating peptide release as an isolated event. Studying both components gives a more complete view of translational control.
Mutations or drugs that affect release factors can disrupt the normal relationship between stop-codon recognition, peptide release, and ribosome recycling. The resulting changes may alter protein synthesis accuracy or the production of completed polypeptides. For this reason, release factors provide a focused way to study how molecular perturbations propagate into broader changes in gene expression.
Studies of release factors can connect a molecular termination event with larger questions about gene expression. Researchers can use this system to examine protein synthesis accuracy, the organization of translation control, and the consequences of altered termination. Comparing bacterial and eukaryotic factors further places these findings in the context of different biological translation systems.