Q.The site of production of ADA in the body is:

Adenosine Deaminase (ADA) is a critical enzyme required for the proper functioning of the immune system. Its deficiency leads to severe combined immunodeficiency (SCID), a condition where the body's immune response is severely compromised. Lymphocytes, which are a type of white blood cell, are the primary cells responsible for immunity and are the site where ADA is produced. This is evident in gene therapy for ADA deficiency, …

The ability to manipulate genetic material has revolutionized medicine, allowing us to produce crucial biological molecules outside the human body. For instance, transgenic bacteria are engineered to produce human proteins like insulin or growth hormone on a large scale. This biotechnological marvel also extends to enzymes like Adenosine Deaminase (ADA), which can be produced in laboratories for therapeutic applications. However, within the human body, ADA is naturally synthesized by specific cells to maintain essential physiological functions.

Adenosine Deaminase (ADA) is an enzyme that plays a critical role in the purine metabolism pathway. Its primary function is to catalyze the deamination of adenosine and deoxyadenosine, converting them into inosine and deoxyinosine, respectively. This process is crucial because the accumulation of adenosine and deoxyadenosine can be toxic, particularly to developing lymphocytes.

A deficiency in ADA leads to a severe genetic disorder known as Severe Combined Immunodeficiency (SCID). In individuals with SCID, the absence of functional ADA results in the buildup of toxic metabolites, especially deoxyadenosine triphosphate (dATP). This dATP is particularly harmful to lymphocytes, which are a type of white blood cell central to the adaptive immune response. The toxicity impairs the development and function of both B-lymphocytes and T-lymphocytes, rendering the immune system virtually non-functional. …

Method — connect the enzyme to the cell type it protects

ADA deficiency's clinical damage is specifically to the immune system → the cells most dependent on ADA (and most damaged by its absence) are lymphocytes, the white blood cells responsible for immunity. …