EGLN3/PHD3 Proteins and Enzymes

Egl nine homolog 3 (EGLN3), also known as PHD3, is a widely expressed 27 kDa enzyme that hydroxylates proline residues on target proteins including HIF-1 alpha. HIF-1 is an alpha/beta heterodimeric transcriptional activator that upregulates genes involved in mitigating the effects of hypoxia. Normally, and in the presence of abundant oxygen, the HIF-1 alpha-chain is hydroxylated by PHD family members, which results in its ubiquitylation and degradation. Under low oxygen tension, EGLN3 activity ...