Definition

1. Noun:
   • A protein containing chemically bound phosphoric acid: A phosphoprotein is a type of protein that has phosphate groups attached to some of its amino acid residues (typically serine, threonine, or tyrosine) through a covalent bond. This modification, called phosphorylation, is crucial for regulating the protein's function and activity within the cell.

Usage Examples

• Noun:
  • Casein, a milk protein, is a classic example of a phosphoprotein.
  • The activity of many enzymes is controlled because they are phosphoproteins.
  • Researchers are studying the phosphoprotein to understand its role in cell signaling.

Advanced Usage

• Scientific Context: The term is primarily used in biochemistry, molecular biology, and nutrition. It describes a functional class of proteins central to cellular processes.
  • Phosphoprotein phosphatases are enzymes that remove phosphate groups from phosphoproteins.

Variants and Related Words

• Phosphorylate (verb): To add a phosphate group to a molecule, such as a protein.
  • The kinase enzyme will phosphorylate the target protein.
• Phosphorylation (noun): The biochemical process of adding a phosphate group.
  • Protein phosphorylation is a key regulatory mechanism.
• Dephosphorylation (noun): The removal of a phosphate group.

Synonyms

• Phosphorylated protein: A more descriptive synonym.
• There are no common, simple synonyms; it is a precise scientific term.

Related Phrases/Idioms

• This is a technical term and is not used in idiomatic expressions or phrasal verbs.

Noun

1. containing chemically bound phosphoric acid