Sir2 Deacetylase
Sir2 Deacetylase - Related Videos
09:07
Single-Step Enrichment of a TAP-Tagged Histone Deacetylase of the Filamentous Fungus Aspergillus nidulans for Enzymatic Activity Assay
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Cited by 5 •
2019
Class 1 histone deacetylases (HDACs) like RpdA have gained importance as potential targets to treat fungal infections. Here we present a protocol for the specific enrichment of TAP-tagged RpdA combined with an HDAC activity assay that allows in vitro efficacy testing of histone deacetylase inhibitors.
06:40
G2-seq: A High Throughput Sequencing-based Technique for Identifying Late Replicating Regions of the Genome
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2018
We describe a technique for combining flow cytometry and high throughput sequencing to identify late replicating regions of the genome.
14:32
Deacetylation Assays to Unravel the Interplay between Sirtuins (SIRT2) and Specific Protein-substrates
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Cited by 1 •
2016
This protocol describes the required steps to execute in vitro and in vivo deacetylation assays in order to establish the role of proteins as specific deacetylation substrates for sirtuins and further study the role of reversible - lysine acetylation as a post-translational modification.
02:04
Co-activators and Co-repressors
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2020
Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
01:52
Eukaryotic Transcription Inhibitors
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2020
Certain biochemical processes, such as embryonic development and cell growth regulation, depend on the repression of specific genes. DNA binding proteins known as eukaryotic transcription inhibitors regulate the repression of gene expression in eukaryotes. The presence of these inhibitors at the required location and time in the cell is triggered by the presence of hormones and additional signals from other cells. Eukaryotic transcription inhibitors usually contain two distinct domains, a DNA...
FAQs
NAD+ is not merely a reactant in Sir2 chemistry; it links catalytic activity to metabolic state. Because NAD+ participates directly in the reaction, changes in its cellular availability can affect the context for removing acetyl groups. This creates a mechanistic connection between metabolism and chromatin regulation, helping explain how metabolic conditions can be coupled to changes in gene control.
Sir2 catalysis generates defined products rather than releasing only a deacetylated substrate. The acetyl group is transferred from the target protein while NAD+ is consumed, producing nicotinamide and O-acetyl-ADP-ribose. These products reflect the enzyme’s NAD+-dependent reaction and provide chemical context for understanding how its activity differs from ordinary protein deacetylation.
When histones lose acetyl groups, their structure can change in ways that influence how chromatin is organized and regulated. That structural effect connects Sir2 activity to gene expression rather than limiting its consequences to a chemical modification. In genetics, examining this relationship helps explain how enzymatic activity can affect the control of genomic information.
A genetics-focused study can trace the relationship between Sir2 activity, histone structure, chromatin regulation, and gene expression. It can also consider consequences for DNA repair, genome stability, and cellular stress responses. Together, these connections provide a framework for interpreting how a metabolic enzyme may influence inherited cellular programs and genome-associated processes.
Sir2 activity is relevant to several genetic outcomes, including altered gene expression, DNA repair regulation, and genome stability. These effects arise from its influence on histone structure and other protein targets, extending its significance beyond chromatin alone. Studying the enzyme therefore helps connect molecular deacetylation with broader changes in how cells maintain and regulate their genetic material.
Sir2 provides a way to investigate how cellular metabolism influences epigenetic regulation across biologically important contexts. Its activity can affect chromatin-related gene control, DNA repair, genome stability, and stress responses, all of which are relevant to cellular state. For this reason, Sir2 and related sirtuins support research into aging, development, and disease-associated changes in gene expression.