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A lysosome (/ ˈ l aɪ s ə ˌ s oʊ m /) is a single membrane-bound organelle found in many animal cells. [1] [2] They are spherical vesicles that contain hydrolytic enzymes that digest many kinds of biomolecules. A lysosome has a specific composition, of both its membrane proteins and its lumenal proteins.
Lysozyme Identifiers EC no. 3.2.1.17 CAS no. 9001-63-2 Databases IntEnz IntEnz view BRENDA BRENDA entry ExPASy NiceZyme view KEGG KEGG entry MetaCyc metabolic pathway PRIAM profile PDB structures RCSB PDB PDBe PDBsum Gene Ontology AmiGO / QuickGO Search PMC articles PubMed articles NCBI proteins Protein family Glycoside hydrolase, family 22, lysozyme Lysozyme crystals stained with methylene ...
This CMA-targeting motif is recognized by a cytosolic chaperone, heat shock cognate protein of 70 kDa (hsc70) which targets the substrate to the lysosome surface. [5] This substrate protein-chaperone complex binds to lysosome-associated membrane protein type 2A (LAMP-2A), which acts as the receptor for this pathway. [6]
An assay on the rates of activity of these enzymes may be used to ascertain biological demand for phosphates in the soil. Some plant roots, especially cluster roots , exude carboxylates that perform acid phosphatase activity, helping to mobilise phosphorus in nutrient-deficient soils.
Ragulator-Rag Complex, inactive. Ragulator-Rag Complex, active. The Ragulator-Rag complex is a regulator of lysosomal signalling and trafficking in eukaryotic cells, which plays an important role in regulating cell metabolism and growth in response to nutrient availability in the cell. [1]
The lysosome is commonly referred to as the cell's recycling center because it processes unwanted material into substances that the cell can use. Lysosomes break down this unwanted matter by enzymes, highly specialized proteins essential for survival. Lysosomal disorders are usually triggered when a particular enzyme exists in too small an ...
The mutation increases the amount of Ca2+ flow through TPC2 by NAADP evoked signals. This increase in signaling leads to an increase in size of the lysosomes due to the increased rate and amount of fusion. The lysosome, therefore, is not able to break down components the way it should. This inability is associated with the onset of the disease.
The ability of the lysosome to degrade a diverse set of cargo is attributed to the lysosomal lipase and other soluble hydrolases. These enzymes include sulphatases, phosphatases, peptidases, glycosidases, and nucleases. [3] The biochemical role of these enzymes are observed in various pathways, specifically in lipid catabolism.