Definition

1. Noun:
   • An enzyme in intestinal juice that activates trypsin: Enterokinase is a specific enzyme produced in the duodenum (the first part of the small intestine). Its primary and defining function is to catalyze the conversion of the inactive pancreatic proenzyme trypsinogen into its active form, trypsin. This activation is a crucial first step in the digestion of proteins, as active trypsin then goes on to activate other digestive enzymes.

Usage Examples

• Noun:
  • The presence of enterokinase is essential for initiating protein digestion in the small intestine.
  • A deficiency in enterokinase can lead to severe malnutrition and digestive problems.
  • The enzyme enterokinase cleaves a peptide fragment from trypsinogen to form trypsin.

Advanced Usage

• Biochemical Context: In biochemistry and physiology, "enterokinase" is discussed as a key regulatory enzyme in the digestive cascade. It is unique because it is an intestinal enzyme that activates a pancreatic enzyme.
  • The study focused on the catalytic mechanism of enterokinase.
• Medical Context: The term is used when discussing digestive disorders or enzyme deficiencies.
  • The patient's condition was diagnosed as enterokinase deficiency.

Variants and Related Words

• Enteropeptidase: This is the more precise, alternative name for the same enzyme. "Enterokinase" remains in common use, but "enteropeptidase" is often preferred in modern biochemical nomenclature.
  • Enteropeptidase is secreted by the brush border cells of the duodenum.

Synonyms

• Activator of trypsinogen: A descriptive synonym highlighting its function.
• Enteropeptidase: The alternative systematic name.

Related Phrases / Compound Terms

• Enterokinase deficiency: A rare genetic disorder where the body produces little or no functional enterokinase, leading to impaired digestion and failure to thrive, especially in infants.
  • Early diagnosis of enterokinase deficiency is critical for proper nutritional management.

Noun

1. enzyme in the intestinal juice that converts inactive trypsinogen into active trypsin