What does phosphatase mean?
A phosphatase is an enzyme that removes phosphate groups from molecules by breaking phosphate ester bonds, usually producing inorganic phosphate. These enzymes are present in many biological systems and take part in processes such as cell signaling, metabolism, bone formation, and regulation of phosphate balance. The term is especially common in biochemistry, clinical medicine, and molecular biology, where particular phosphatases may be identified by their preferred conditions or by the tissue in which they occur. Alkaline phosphatase, for example, is widely associated with bone and liver-related blood tests, while acid phosphatase is important in certain cellular and diagnostic contexts. Although phosphatase may sound like a specialized laboratory term, it refers to a broad and biologically important class of enzymes whose activity can reveal or influence normal bodily processes.
nounAn enzyme that catalyzes the hydrolysis of phosphate esters, removing a phosphate group from a molecule. Phosphatases occur in organisms and help regulate processes involving phosphate, including cell signaling and bone development.
- A noun referring to an enzyme that hydrolyzes phosphate esters and liberates inorganic phosphate.
"The laboratory measured alkaline phosphatase activity to assess the health of the patient's bones."
"A high level of alkaline phosphatase in the blood may indicate increased bone formation or a problem with bile flow."
"Researchers inhibited phosphatase activity to determine whether the enzyme controlled the cell's response to growth factors."
The plural is used when referring to multiple distinct enzymes of this class or multiple examples of the enzyme.
"The screen identified several phosphatases capable of removing phosphate from the protein."
One of the body's most useful chemical editors, alkaline phosphatase helps control phosphate levels and is also a familiar clue in blood tests used to examine bone and liver health.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does phosphatase come from?
Phosphatase was formed in biochemical terminology from phosphate plus the enzyme suffix -ase, a form of the Greek-derived suffix used to indicate an enzyme that catalyzes a particular reaction. The phosphate element belongs to a wider family of English words based on phosphorus, from Greek phōs, meaning light, and phoros, meaning bearing. In the late nineteenth and early twentieth centuries, the systematic naming of enzymes by the substrates on which they act produced terms such as phosphatase, alongside related names for enzymes acting on other phosphate-containing substrates.
How phosphatase is actually used
Phosphatase is primarily a formal scientific and medical term. It is commonly used with modifiers such as alkaline, acid, and tissue-specific, and related expressions include phosphatase activity, level, assay, and inhibition.
Easily confused with phosphatase
A phosphatase is an enzyme that acts on phosphate-containing molecules, whereas a phosphate is a chemical group, ion, or salt containing phosphorus and oxygen.