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The reverse reaction in mammalian cells is catalyzed by acyl-protein thioesterases (APTs) in the cytosol and palmitoyl protein thioesterases in lysosomes. Because palmitoylation is a dynamic, post-translational process , it is believed to be employed by the cell to alter the subcellular localization, protein–protein interactions, or binding ...
An oligopeptide (oligo-, "a few"), is a peptide consisting of two to twenty amino acids, including dipeptides, tripeptides, tetrapeptides, and other polypeptides. Some of the major classes of naturally occurring oligopeptides include aeruginosins , cyanopeptolins , microcystins , microviridins , microginins , anabaenopeptins , and cyclamides .
Palmitoyl pentapeptide-4 (palmitoyl pentapeptide-3 before 2006) is a matrikine used in anti-wrinkle cosmetics. It was launched in 2000 as an active ingredient for the personal care industry under the trade name Matrixyl by the Spanish cosmetic active ingredient manufacturer Sederma SAS.
The prolyl-oligopeptidase or prolyl endopeptidase (POP) is a good example of how an oligopeptidase interacts with and metabolizes an oligopeptide. The peptide has first to penetrate into a 4 Å hole on the surface of the enzyme in order to reach an 8,500Å 3 internal cavity, where the active site is located.
The hydrophobic isoprene (e.g., farnesyl, geranyl, and geranylgeranyl groups) and palmitoyl groups may be added to the atom of cysteine residues to anchor proteins to cellular membranes. Unlike the GPI and myritoyl anchors, these groups are not necessarily added at the termini. carboxylation
Palmitoyl protein hydrolase/thioesterases is an enzyme (EC 3.1.2.22) that removes thioester-linked fatty acyl groups such as palmitate from modified cysteine residues in proteins or peptides during lysosomal degradation. It catalyzes the reaction palmitoyl[protein] + H 2 O palmitate + protein
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Proteins of the OAT family catalyze the Na +-independent facilitated transport of fairly large amphipathic organic anions (and less frequently neutral or cationic drugs), such as bromosulfobromophthalein, prostaglandins, conjugated and unconjugated bile acids (taurocholate and cholate), steroid conjugates, thyroid hormones, anionic oligopeptides, drugs, toxins and other xenobiotics. [2]