Defective ADA disrupts (deoxy)adenosine deamination

Summary
Organism
Homo sapiens (human)
Reactome
R-HSA-9734735
PubChem
R-HSA-9734735
Description
  • Normally in humans, adenosine and deoxyadenosine can be deaminated to inosine and deoxyinosine, catalyzed by ADA (adenosine deaminase). In the absence of ADA activity, however, accumulated nucleosides disrupt lymphoid cell function, leading to severe combined immunodeficiency (Hirschhorn et al. 1989, 1990).
Click on a node on the pathway to see its details. Glycoproteins are marked with a glycoprotein icon in their name.
Displaying 1 entry
UniProt ID Protein Name Gene Symbol Pathway Viewer
P00813 Adenosine deaminase
  • ADA
  • ADA1
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Acknowledgements

Supported by JST NBDC Grant Number JPMJND2204

Partly supported by NIH Common Fund Grant #1U01GM125267-01


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Last updated: April 6, 2026