| mRNA IDs | Primary Information | |
| NM_000215.2 | Gene Symbol | JAK3 |
| Protein Name | Janus kinase 3 (a protein tyrosine kinase, leukocyte) | |
| Alternate Names | JAK-3, JAK3_HUMAN, JAKL, L-JAK, LJAK | |
| Gene Locus | 19p13.1 | |
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| Disease name | Characteristic / Associated features | Category | inheritance type |
| JAK3 deficiency | Recurrent bacterial infections; recurrent cytomegaloviral infections; recurrent Penumocystis carnii infections; absence of T lymphocytes; absence of NK cells; normal to elevated numbers of non-functional B lymphocytes; marked hypoplasia of lymphoid tissues | Combined T-cell and B-cell immunodeficiencies | Autosomal recessive |