Conjugated molecules

Tunicamycin blocks the transfer of N-acetylglucosamine-1-phosphate onto dolichol phosphate, halting the assembly of the core sugar chain.

UDP-GlcNAc synthesis requires glucose, glutamine, acetyl-CoA, and UTP, making its concentrations highly responsive to overall cellular nutrient status.

Without N-linked oligosaccharide chains, nascent polypeptides inside the ER lumen cannot fold properly, triggering the unfolded protein response.

Sulfated and carboxylated sugars carry negative charges, creating electrostatic fields that draw in water molecules to form a resilient gel.

Proteins are denser than lipids (1.3 g/mL vs. 0.9 g/mL). Particles containing more protein and less lipid exhibit a higher overall density.

Chaperones like calnexin bind to glycoproteins carrying a single terminal glucose, ensuring the protein folds properly before moving on.

Enveloped viruses use host-derived lipids embedded with viral glycoproteins to form a shield that facilitates membrane fusion.

Non-polar triacylglycerols and cholesterol esters aggregate in water; lipoproteins shield them to allow smooth transport through the blood.

Lipoteichoic acids span the thick peptidoglycan layer and use their lipid tails to anchor the wall assembly into the cytoplasmic membrane.

Horseradish peroxidase is a complex conjugated enzyme; it contains an iron-bearing heme group and carries structural carbohydrate chains.

Cancer cells alter their surface glycosylation profiles, which helps them evade immune detection and metastasize to other tissues.

Lipoprotein lipase hydrolyzes the triacylglycerols inside circulating chylomicrons and VLDLs, releasing free fatty acids for tissue uptake.

Spliceosomes are specialized ribonucleoproteins; they require small nuclear RNAs to recognize splice sites on pre-mRNA transcripts.

Genetic variations dictate which glycosyltransferase is active, determining whether an extra N-acetylgalactosamine (A) or galactose (B) is added.

Lipidation, such as prenylation or palmitoylation, adds a hydrophobic lipid tail to a protein, anchoring it into a lipid bilayer.

Many nucleoporins are modified with single O-linked N-acetylglucosamine (O-GlcNAc) residues, which are essential for pore function and transport regulation.

Ferritin is a hollow metalloprotein shell that stores iron atoms safely as ferric oxide mineral cores, preventing oxidative cellular damage.

The central axis of a proteoglycan monomer is a core protein, from which numerous long glycosaminoglycan chains extend outwards.

The oligosaccharide chains on circulating glycoprotein hormones shield them from rapid hepatic filtration and enzymatic degradation.