Lysine Modification
Lysine Modification - Related Videos
02:32
Histone Modification
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2020
The histone proteins have a flexible N-terminal tail extending out from the nucleosome. These histone tails are often subjected to post-translational modifications such as acetylation, methylation, phosphorylation, and ubiquitination. Particular combinations of these modifications form “histone codes” that influence the chromatin folding and tissue-specific gene expression. Acetylation The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone deacetylase,...
07:02
Application of MassSQUIRM for Quantitative Measurements of Lysine Demethylase Activity
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Cited by 1 •
2012
We present a method for using MALDI mass spectrometry and reductive methylation chemistry to quantify changes in lysine methylation.
07:08
Detection of Histone Modifications in Plant Leaves
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Cited by 22 •
2011
A reliable and useful approach to detect histone modifications on specific plant genes is described. The approach combines chromatin immunoprecipitation (ChIP) and real-time quantitative PCR. It allows detection of histone modifications on specific genes with a role in diverse physiological processes.
08:08
An Assay for Measuring the Activity of Escherichia coli Inducible Lysine Decarboxyase
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Cited by 7 •
2010
The activity of the inducible lysine decarboxylase is monitored by reacting the substrate L-lysine and the product cadaverine with 2,4,6-trinitrobenzensulfonic acid to form adducts that have differential solubility in toluene.
02:25
Spreading of Chromatin Modifications
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2020
The histone proteins in the nucleosomes are post-translationally modified (PTM) to increase or decrease access to DNA. The commonly observed PTMs are methylation, acetylation, phosphorylation, and ubiquitination of lysine amino acids in the histone H3 tail region. These histone modifications have specific meaning for the cell. Hence, they are called "histone code". The protein complex involved in histone modification is termed as "reader-writer" complex. Writers The writer is an enzyme that can...
FAQs
The chemical group attached to a lysine residue can alter its charge, structure, or ability to recruit binding partners. Acetyl, methyl, ubiquitin, and SUMO groups therefore create distinct regulatory consequences, even when they occur on related residues. These changes can influence protein activity, stability, localization, interactions, and participation in cellular pathways.
Writers add selected chemical groups to lysine side chains, whereas erasers remove them, allowing modification states to change as cellular conditions require. Recognition proteins bind particular modified residues and help translate those marks into downstream effects. Together, these components provide controlled placement, removal, and interpretation of regulatory information on proteins.
Reversible modification allows cells to adjust protein behavior rather than imposing a permanent change. Adding or removing a group can shift a protein’s activity, stability, location, or interactions, enabling responses to changing cellular conditions. This dynamic control also helps coordinate signaling, protein degradation, chromatin organization, and gene expression.
Analytical methods can identify which lysine residues carry modifications and then connect those sites with changes in protein behavior. Investigation may therefore distinguish the location of a modification from its consequence for activity, stability, localization, or interactions. This information helps researchers determine how a molecular change contributes to broader cellular regulation.
Lysine modifications help regulate chromatin organization, which affects how genetic material is arranged within the cell. Through this influence, modification states can contribute to changes in gene expression. The outcome depends on the chemical group present and the proteins that recognize it, linking residue-level regulation with control of cellular programs.
Lysine modification contributes to signaling and protein degradation while also influencing protein activity, stability, localization, and interactions. These effects allow modification systems to coordinate multiple cellular responses rather than controlling only one pathway. Studying these relationships provides context for understanding how cells organize regulation across molecular and physiological processes.
Because lysine modification regulates protein behavior and cellular responses, changes in these systems can be examined in biological contexts such as development, metabolism, and disease mechanisms. Researchers can analyze modification sites and their consequences to connect molecular regulation with altered cellular functions, helping clarify how these processes contribute to broader biological outcomes.