Mitochondrial Glycosylation
Mitochondrial Glycosylation - Related Videos
01:25
Protein Glycosylation
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2023
Glycosylation, the most common post-translational modification for proteins, serves diverse functions. Adding sugars to proteins makes the proteins more resistant to proteolytic digestion. Glycosylated proteins can act as markers and receptors to promote cell-cell adhesion. Additionally, they have many essential quality control functions in the cell, such as correct protein folding and facilitating transport of misfolded proteins to the cytosol, which can be degraded. Glycosylation occurs in...
11:27
Analysis of SCAP N-glycosylation and Trafficking in Human Cells
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Cited by 17 •
2016
We describe a modified method for membrane fraction isolation from human cells and sample preparation for the detection of SCAP N-glycosylation and total protein by using western blot. We further introduce a GFP-labeling method to monitor SCAP trafficking using confocal microscopy. This protocol can be used in regular biology laboratories.
09:54
Identification and Characterization of Protein Glycosylation using Specific Endo- and Exoglycosidases
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Cited by 31 •
2011
Using specific glycosidases to remove sugars from glycoproteins followed by SDS-PAGE is a valuable method to detect glycan modifications on protein samples and is a good choice for initial glycobiology studies. Changes following deglycosylation can be detected as shifts in gel mobility or by staining with glycan sensitive reagents.
02:59
Animal Mitochondrial Genetics
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2020
Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
08:40
An Optimized Protocol to Analyze Glycolysis and Mitochondrial Respiration in Lymphocytes
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Cited by 38 •
2016
The study of metabolism is becoming increasingly relevant to immunological research. Here, we present an optimized method for measuring glycolysis and mitochondrial respiration in mouse splenocytes, and T and B lymphocytes.
FAQs
UDP-GlcNAc supplies the N-acetylglucosamine group transferred during O-GlcNAcylation. Because this donor is connected to cellular nutrient status, changes in metabolic conditions can influence how much modification is available for mitochondrial proteins. This relationship gives bioengineers a molecular connection between nutrient-responsive metabolism and regulation of mitochondrial functions, including energy-related activity.
The abundance of a glycosylation modification depends on opposing enzyme activities that add and remove it. Their balance prevents the modification from being interpreted as a fixed feature of mitochondrial proteins and allows it to respond to changing nutrient or stress conditions. Examining this balance can clarify how protein regulation shifts alongside mitochondrial and metabolic state.
In the best-characterized form, O-GlcNAcylation targets serine or threonine residues on proteins. These residue-specific changes can alter how mitochondrial proteins are regulated, making the modification relevant to organelle function rather than merely to carbohydrate handling. Tracking such sites helps connect molecular changes in proteins with broader effects on mitochondrial performance and cellular metabolism.
Nutrient and stress conditions can alter the abundance of mitochondrial glycosylation through the activities that regulate its addition and removal. As a result, the same modification system can reflect changing cellular circumstances rather than a constant baseline. This responsiveness is important when interpreting mitochondrial phenotypes, because altered protein glycosylation may accompany changes in energy production or metabolic regulation.
Bioengineered cell-based models can be used to examine how changes in mitochondrial glycosylation relate to metabolic flux, mitochondrial energy production, and protein regulation. The central approach is to connect glycosylation changes with these functional features rather than evaluating the modification in isolation. Such models support controlled investigation of how tuning mitochondrial regulation may affect overall cellular behavior.
This research can provide molecular insight into altered mitochondrial performance and its relationship to cellular metabolism. In particular, glycosylation patterns may help researchers interpret how metabolic flux and energy production are associated with protein regulation. The findings can guide development of cell-based models and inform strategies intended to tune mitochondrial function while also clarifying mechanisms relevant to mitochondrial or metabolic disorders.