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Regulation of Expression at Multiple Steps

Regulation of Expression at Multiple Steps

The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the...

Regulation of Expression Occurs at Multiple Steps

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Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...

Regulation of Expression Occurs at Multiple Steps

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Sealable Femtoliter Chamber Arrays for Cell-free Biology

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Shaping development by stochasticity and dynamics in gene regulation.

Peng Dong¹, Zhe Liu²

¹Howard Hughes Medical Institute, Janelia Research Campus, 19700 Helix Dr, Ashburn, VA 20147, USA dongp@janelia.hhmi.org.

|May 5, 2017

Summary

Animal development involves gene expression, balancing single-cell randomness with coordinated embryonic patterns. Understanding this interplay is key to deciphering cell fate and body plan formation.

Keywords:

bursting development gene expression noise gene regulation gene regulatory network imaging

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Area of Science:

Developmental Biology
Systems Biology
Genetics

Background:

Animal development relies on precise spatio-temporal gene expression for cell differentiation and organismal morphology.
Two key gene regulation mechanisms exist: stochasticity in single cells and coordinated dynamics in embryos.

Purpose of the Study:

To discuss the origins and interplay of stochastic and coordinated gene regulation in animal development.
To review technological advancements for analyzing gene regulation at single-cell, single-molecule resolution.
To outline future experiments for bridging molecular dynamics and robust embryonic gene regulation.

Main Methods:

Review of existing literature on gene regulation in developmental biology.
Discussion of molecular and systems-level mechanisms of gene expression control.
Analysis of recent technological advancements in quantitative gene expression analysis.

Main Results:

Gene regulation in development involves a balance between randomness at the molecular level and coordinated patterns at the systems level.
This balance is crucial for determining cell fate and establishing the complex body plan.
New technologies enable unprecedented resolution in studying gene regulation dynamics.

Conclusions:

The interplay between stochastic and coordinated gene expression is fundamental to animal development.
Advanced quantitative methods are essential for understanding these complex regulatory processes.
Future research should focus on integrating single-cell dynamics with whole-embryo regulation principles.