Phosphatase Enzymes
Phosphatase Enzymes - Related Videos
02:54
Protein Kinases and Phosphatases
0 Views •
2020
Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven. Protein kinases Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
03:08
Tartrate-Resistant Acid Phosphatase Staining: An In Vitro Technique to Detect TRAP Enzyme-Containing Cultured Osteoclasts
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2025
This video demonstrates the tartrate-resistant acid phosphatase staining technique to detect the presence of TRAP-containing granules inside osteoclasts. The technique forms magenta-colored dye granule deposits in the cytoplasm of osteoclasts, rendering them visible under an inverted microscope.
08:10
Multi-enzyme Screening Using a High-throughput Genetic Enzyme Screening System
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Cited by 7 •
2016
This work presents a method of high-throughput screening using a universal genetic enzyme screening system that can be theoretically applied to over 200 enzymes. Here, the single screening system identifies three different enzymes (lipase, cellulase, and alkaline phosphatase) by simply changing the substrate used (p-nitrophenyl acetate, p-nitrophenyl-β-D-cellobioside, and phenyl phosphate).
04:22
Phosphatase Assay in CRC Cells: A Method to Examine the Phosphorylation Status of Tau Protein in Colorectal Cancer Cells
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2023
This video describes a protocol for assessing the phosphorylation status of tau protein by a phosphatase assay in colorectal cancer cells. Phosphatase enzyme acts on the phosphate groups present on the tau protein, increasing the mobility of tau protein on SDS PAGE gel compared to the untreated tau protein samples.
02:34
Enzymes
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2020
Inside living organisms, enzymes act as catalysts for many biochemical reactions involved in cellular metabolism. The role of enzymes is to reduce the activation energies of biochemical reactions by forming complexes with its substrates. The lowering of activation energies favor an increase in the rates of biochemical reactions. Enzyme deficiencies can often translate into life-threatening diseases. For example, a genetic abnormality resulting in the deficiency of the enzyme G6PD...
FAQs
Hydrolysis uses water to break phosphate ester or phosphoanhydride bonds linking a phosphate group to its substrate. The enzyme promotes this reaction by positioning the substrate and stabilizing reaction intermediates, allowing dephosphorylation to proceed efficiently. This chemical mechanism enables phosphatases to alter the state of proteins, sugars, nucleotides, and other phosphorylated molecules.
Many phosphatases depend on metal ions or conserved catalytic residues to stabilize charged reaction intermediates formed during phosphate-bond hydrolysis. These components support the catalytic chemistry rather than serving merely as structural features. Their involvement helps explain why changes in catalytic residues or metal-dependent conditions can influence whether a phosphatase efficiently processes its phosphorylated substrates.
Phosphatases can act on different molecular classes, including proteins, sugars, nucleotides, and other phosphorylated compounds. Their specificity determines which cellular reactions are altered when phosphate groups are removed. Consequently, phosphatase activity can influence distinct outcomes in signal transduction, metabolism, cell-cycle progression, or gene regulation rather than producing one uniform cellular response.
Phosphatases and kinases exert opposing influences on the phosphorylation state of cellular molecules. Kinases add phosphate groups, whereas phosphatases remove them through hydrolysis. The balance between these activities helps determine whether regulatory molecules remain phosphorylated or become dephosphorylated. Disruption of that balance can therefore affect signaling, metabolism, cell-cycle control, and gene regulation.
Phosphatase activity is closely linked with signal transduction, metabolic regulation, cell-cycle progression, and gene regulation. In each setting, removing phosphate groups can change the activity or regulatory state of affected molecules. Studying these enzymes helps biology researchers connect molecular phosphorylation changes with broader cellular outcomes and understand how coordinated regulation is maintained.
Their central role in balancing kinase activity makes phosphatases useful subjects for investigating cellular dysfunction. Research can examine how catalytic mechanisms, substrate specificity, and phosphorylation balance influence normal or altered cellular regulation. Because these enzymes participate in several major biological processes, they are also considered potential targets for understanding or treating conditions associated with disrupted cellular chemistry.