Definition

Noun: 1. A sweet-tasting crystalline amino acid: Serine is one of the twenty common amino acids that are the building blocks of proteins in living organisms. It is classified as a polar, hydrophilic (water-attracting) amino acid. 2. A biosynthetic precursor: In biochemistry, serine is involved as an intermediate in the synthesis of other important biological molecules, most notably cysteine, as well as glycine and phospholipids.

Usage Examples

• As a biochemical component:
  • The enzyme's active site contains a critical serine residue that is essential for its catalytic function.
  • A deficiency in serine can disrupt the production of important cellular components.
• In a nutritional or biochemical context:
  • This metabolic pathway shows how serine is converted into cysteine.
  • The researcher studied the role of serine in neural development.

Advanced Usage

• "Phosphoserine": A modified form of serine where a phosphate group is attached. This modification is a crucial regulatory mechanism in cell signaling, often turning proteins on or off.
  • The activation of the receptor is marked by the presence of phosphoserine.
• "Serine protease": A major class of enzymes (like trypsin) that use a serine residue in their active site to cleave peptide bonds in other proteins.
  • Digestive enzymes such as trypsin are classic examples of serine proteases.

Variants and Related Words

• L-serine (n): The specific, naturally occurring form (stereoisomer) of serine found in proteins.
• Serinyl (adj): A prefix or combining form used in biochemistry to denote the presence of a serine moiety, as in a peptide chain.

Synonyms

• Amino acid: (general category) Serine is a specific type of amino acid.
• Proteinogenic amino acid: (specific category) An amino acid that is incorporated into proteins during translation.

Related Biochemical Terms (Not Phrasal Verbs)

• Serine biosynthesis: The metabolic pathway that produces serine within a cell.
• Serine metabolism: The sum of all biochemical processes involving the creation, modification, and breakdown of serine.

Notes

• Serine is a non-essential amino acid for humans, meaning the body can synthesize it and it is not strictly required from the diet.
• Its three-letter abbreviation is Ser and its one-letter code is S.

Noun

1. a sweetish crystalline amino acid involved in the synthesis by the body of cysteine