Definition

1. Noun:
   • An enzyme: A specific protein found in mammals that acts as a biological catalyst.
   • Primary Function: It catalyzes the chemical reaction of deamination, specifically converting the nucleoside adenosine into inosine and ammonia.
   • Medical Significance: A deficiency in this enzyme is directly linked to a specific form of severe combined immunodeficiency disease (SCID), a serious genetic disorder affecting the immune system.
   • Genetic Research Significance: The gene responsible for producing this enzyme was among the first human genes to be successfully isolated and cloned for scientific study.

Usage Examples

• Noun:
  • The doctor explained that the child's immune deficiency was caused by a lack of adenosine deaminase.
  • Researchers are studying the structure of adenosine deaminase to develop new therapies.
  • The function of adenosine deaminase is critical for a healthy immune system.

Advanced Usage

• "ADA deficiency": The medical condition resulting from insufficient levels or non-functional adenosine deaminase enzyme.

  • Early diagnosis of ADA deficiency is crucial for treatment.

• "ADA-SCID": An acronym for the specific type of severe combined immunodeficiency disease caused by adenosine deaminase deficiency.

  • Gene therapy has shown promise in treating ADA-SCID.

Variants and Related Words

• ADA: A common acronym for adenosine deaminase.

  • The ADA gene is located on chromosome 20.

• Deaminase (n): A general term for any enzyme that catalyzes a deamination reaction (removal of an amino group).

  • Adenosine deaminase is one type of deaminase.

• Deamination (n): The chemical process of removing an amino group from a molecule, which is the reaction catalyzed by this enzyme.

Synonyms

• Enzyme: (General term) A protein that acts as a catalyst.
• Catalyst: (General term) A substance that increases the rate of a chemical reaction.

Related Terms and Contexts

• Inosine: The product formed when adenosine deaminase acts on adenosine.
• Purine metabolism: The broader biochemical pathway in which adenosine deaminase functions.
• Gene therapy: A field of medicine where treatment for adenosine deaminase deficiency has been a pioneering example.
  • Adenosine deaminase deficiency was the first disease treated with human gene therapy.

Noun

1. an enzyme found in mammals that can catalyze the deamination of adenosine into inosine and ammonia
   • ADA deficiency can lead to one form of severe combined immunodeficiency disease
   • the gene encoding ADA was one of the earlier human genes to be isolated and cloned for study