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Abstract:

Hypoxia-Inducible Factor (HIF) prolyl hydroxylase domains (PHDs) have been proposed to act as sensors that have an important role in oxygen homeostasis. In the presence of oxygen, they hydroxylate two specific prolyl residues in HIF-α polypeptides, thereby promoting their proteasomal degradation. So far, however, the developmental consequences of the inactivation of PHDs in higher metazoans have not been reported. Here, we describe novel loss-of-function mutants of fatiga, the gene encoding the Drosophila PHD oxygen sensor, which manifest growth defects and lethality. We also report a null mutation in dHIF-α/sima, which is unable to adapt to hypoxia but is fully viable in normoxic conditions. Strikingly, loss-of-function mutations of sima rescued the developmental defects observed in fatiga mutants and enabled survival to adulthood. These results indicate that the main functions of Fatiga in development, including control of cell size, involve the regulation of dHIF/Sima. © 2005 European Molecular Biology Organization.

Registro:

Documento: Artículo
Título:Reversion of lethality and growth defects in Fatiga oxygen-sensor mutant flies by loss of Hypoxia-Inducible Factor-α/Sima
Autor:Centanin, L.; Ratcliffe, P.J.; Wappner, P.
Filiación:Instituto Leloir and IIB, FCEyN-Universidad de Buenos Aires, CONICET, Patricias Argentinas 435, Buenos Aires 1405, Argentina
Roosevelt Drive, Oxford OX3 7BN, United Kingdom
Palabras clave:Drosophila; Hypoxia-inducible factor; Oxygen sensor; Sima; Drosophila protein; hypoxia inducible factor alpha; mutant protein; oxygen; protein Fatiga; unclassified drug; article; cell size; controlled study; developmental disorder; developmental stage; Drosophila; gene mutation; genetic code; growth disorder; lethality; mutant; nonhuman; null allele; oxygen sensing; priority journal; protein depletion; protein function; regulatory mechanism; survival; Animals; Cell Hypoxia; Cell Size; DNA-Binding Proteins; Drosophila melanogaster; Drosophila Proteins; Gene Expression Regulation, Developmental; Genes, Lethal; Hypoxia-Inducible Factor 1, alpha Subunit; Larva; Oxygen; Phenotype; Procollagen-Proline Dioxygenase; RNA, Messenger; Time Factors; Metazoa
Año:2005
Volumen:6
Número:11
Página de inicio:1070
Página de fin:1075
DOI: http://dx.doi.org/10.1038/sj.embor.7400528
Título revista:EMBO Reports
Título revista abreviado:EMBO Rep.
ISSN:1469221X
CODEN:ERMEA
CAS:oxygen, 7782-44-7; DNA-Binding Proteins; Drosophila Proteins; Hif prolyl hydroxylase, Drosophila, EC 1.14.11.2; Hypoxia-Inducible Factor 1, alpha Subunit; Oxygen, 7782-44-7; Procollagen-Proline Dioxygenase, EC 1.14.11.2; RNA, Messenger; Sima protein, Drosophila
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_1469221X_v6_n11_p1070_Centanin.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1469221X_v6_n11_p1070_Centanin

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Citas:

---------- APA ----------
Centanin, L., Ratcliffe, P.J. & Wappner, P. (2005) . Reversion of lethality and growth defects in Fatiga oxygen-sensor mutant flies by loss of Hypoxia-Inducible Factor-α/Sima. EMBO Reports, 6(11), 1070-1075.
http://dx.doi.org/10.1038/sj.embor.7400528
---------- CHICAGO ----------
Centanin, L., Ratcliffe, P.J., Wappner, P. "Reversion of lethality and growth defects in Fatiga oxygen-sensor mutant flies by loss of Hypoxia-Inducible Factor-α/Sima" . EMBO Reports 6, no. 11 (2005) : 1070-1075.
http://dx.doi.org/10.1038/sj.embor.7400528
---------- MLA ----------
Centanin, L., Ratcliffe, P.J., Wappner, P. "Reversion of lethality and growth defects in Fatiga oxygen-sensor mutant flies by loss of Hypoxia-Inducible Factor-α/Sima" . EMBO Reports, vol. 6, no. 11, 2005, pp. 1070-1075.
http://dx.doi.org/10.1038/sj.embor.7400528
---------- VANCOUVER ----------
Centanin, L., Ratcliffe, P.J., Wappner, P. Reversion of lethality and growth defects in Fatiga oxygen-sensor mutant flies by loss of Hypoxia-Inducible Factor-α/Sima. EMBO Rep. 2005;6(11):1070-1075.
http://dx.doi.org/10.1038/sj.embor.7400528