EGLN1 prolyl hydroxylation of hypoxia-induced transcription factor HIF1α is repressed by SET7-catalyzed lysine methylation.
J Biol Chem
; 298(6): 101961, 2022 06.
Article
em En
| MEDLINE
| ID: mdl-35452683
ABSTRACT
Egg-laying defective nine 1 (EGLN1) functions as an oxygen sensor to catalyze prolyl hydroxylation of the transcription factor hypoxia-inducible factor-1 α under normoxia conditions, leading to its proteasomal degradation. Thus, EGLN1 plays a central role in the hypoxia-inducible factor-mediated hypoxia signaling pathway; however, the posttranslational modifications that control EGLN1 function remain largely unknown. Here, we identified that a lysine monomethylase, SET7, catalyzes EGLN1 methylation on lysine 297, resulting in the repression of EGLN1 activity in catalyzing prolyl hydroxylation of hypoxia-inducible factor-1 α. Notably, we demonstrate that the methylation mimic mutant of EGLN1 loses the capability to suppress the hypoxia signaling pathway, leading to the enhancement of cell proliferation and the oxygen consumption rate. Collectively, our data identify a novel modification of EGLN1 that is critical for inhibiting its enzymatic activity and which may benefit cellular adaptation to conditions of hypoxia.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Histona-Lisina N-Metiltransferase
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Subunidade alfa do Fator 1 Induzível por Hipóxia
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Prolina Dioxigenases do Fator Induzível por Hipóxia
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Lisina
Tipo de estudo:
Prognostic_studies
Limite:
Animals
/
Humans
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article