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- W1921710171 abstract "Hypoxia-induced gene expression is initiated when the hypoxia-inducible factor-1 (HIF-1) α subunit is stabilized in response to a lack of oxygen. An HIF-1α-specific prolyl-hydroxylase (PHD) catalyzes hydroxylation of the proline-564 and/or -402 residues of HIF-1α by an oxygen molecule. The hydroxyproline then interacts with the ubiquitin E3 ligase von Hippel Lindau protein and is degraded by an ubiquitin-dependent proteasome. PHD2 is the most active of three PHD isoforms in hydroxylating HIF-1α. Structural analysis showed that the N-terminal region of PHD2 contains a Myeloid translocation protein 8, Nervy, and DEAF1 (MYND)-type zinc finger domain, whereas the catalytic domain is located in its C-terminal region. We found that deletion of the MYND domain increased the activity of both recombinant PHD2 protein and in vitro-translated PHD2. The zinc chelator <i>N</i>,<i>N</i>,<i>N</i>′,<i>N</i>′-tetrakis(2-pyridylmethyl)ethylenediamine augmented the activity of wild-type PHD2-F but not that of PHD2 lacking the MYND domain, confirming that the zinc finger domain is inhibitory. Overexpression of PHD2 lacking the MYND domain caused a greater reduction in the stability and function of HIF-1α than did overexpression of wild-type PHD2, indicating that the MYND domain also inhibits the catalytic activity of PHD2 in vivo." @default.
- W1921710171 created "2016-06-24" @default.
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- W1921710171 date "2005-09-09" @default.
- W1921710171 modified "2023-10-10" @default.
- W1921710171 title "Inhibition of the Catalytic Activity of Hypoxia-Inducible Factor-1α-Prolyl-Hydroxylase 2 by a MYND-Type Zinc Finger" @default.
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- W1921710171 doi "https://doi.org/10.1124/mol.105.015271" @default.
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