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Covalently Linked Protein Regulators

Covalently Linked Protein Regulators

Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein.

Covalently Linked Protein Regulators

Covalently Linked Protein Regulators

Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein.

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 addition of a...

Regulation of Expression Occurs at Multiple Steps

Regulation of Expression Occurs at Multiple Steps

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...

Translational Regulation

Translational Regulation

Translational regulation in prokaryotes ensures efficient protein synthesis by controlling ribosome access to mRNA. This regulation is mediated by secondary RNA structures, including translational riboswitches, RNA thermometers, and small RNAs (sRNAs), which respond to intracellular and environmental signals to modulate gene expression.Translational RiboswitchesRiboswitches in the leader region of mRNAs can regulate translation by altering the accessibility of the Shine-Dalgarno (SD) sequence,...

What is Gene Expression?

What is Gene Expression?

A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is comprised of nucleotides and proteins are comprised of amino acids, a mediator is required to convert the information encoded in DNA into proteins. This mediator is the messenger RNA (mRNA). mRNA copies the blueprint from DNA by a process called transcription. In eukaryotes, transcription occurs in the nucleus by complementary base-pairing with the DNA template. The mRNA is then processed and...

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Related Experiment Video

Updated: May 30, 2026

Exploring the Arginine Methylome by Nuclear Magnetic Resonance Spectroscopy

Exploring the Arginine Methylome by Nuclear Magnetic Resonance Spectroscopy

Published on: December 16, 2021

Posttranslational arginylation as a global biological regulator.

Sougata Saha¹, Anna Kashina

¹Department of Animal Biology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.

Developmental Biology

|July 26, 2011

Summary

Protein arginylation, the addition of arginine to proteins, is a vital posttranslational modification crucial for embryogenesis and mammalian development. This process regulates key functions including heart development and angiogenesis.

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Last Updated: May 30, 2026

Exploring the Arginine Methylome by Nuclear Magnetic Resonance Spectroscopy

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Published on: December 16, 2021

In vivo Interrogation of Central Nervous System Translatome by Polyribosome Fractionation

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Published on: April 30, 2014

Area of Science:

Biochemistry
Molecular Biology
Developmental Biology

Background:

Posttranslational modifications significantly impact physiological processes.
Protein arginylation, catalyzed by arginyltransferase (ATE1), involves tRNA-mediated arginine addition.
Emerging evidence highlights arginylation's critical roles beyond initial discoveries.

Purpose of the Study:

To review the current understanding of protein arginylation.
To summarize key findings on arginylation's biological significance.
To highlight arginylation's role in development and morphogenesis.

Main Methods:

Literature review of protein arginylation studies.
Synthesis of data on arginyltransferase (ATE1) function.
Analysis of arginylation's impact on physiological processes.

Main Results:

Arginylation is essential for embryogenesis across diverse organisms.
This modification regulates critical mammalian developmental processes like heart development and angiogenesis.
Protein arginylation influences tissue morphogenesis.

Conclusions:

Protein arginylation is a fundamental posttranslational modification with broad biological implications.
ATE1-mediated arginylation is indispensable for normal development.
Further research into arginylation mechanisms and functions is warranted.