title: Cyclin D/Cdk4: new insights from Drosophila.
abstract: The Drosophila cyclin-dependent protein kinase complex CycD/Cdk4 has been known to drive cellular growth (accumulation of mass) as well as proliferation (cell cycle progression). Recent data demonstrate that Hif prolyl hydroxylase (Hph) is required for the induction of growth, but not for the induction of proliferation. Normal levels of Hph are required for cellular growth, demonstrating that Hph, in addition to its known function in the cellular response low oxygen levels, regulates growth. Since Hph's hydroxylation activity depends on oxygen and possibly the mitochondrial activity, these data provide a link between CycD/Cdk4 and oxygen/energy homeostasis.
authors.affiliation: Zoologisches Institut, University of Zürich, Switzerland. christian.frei@zool.unizh.ch
authors.forename: Christian
authors.initials: C
authors.lastname: Frei
mesh_terms: D000818:Animals; D002453:Cell Cycle / Q000502:physiology; D056741:Cyclin D; D051358:Cyclin-Dependent Kinase 4; D018844:Cyclin-Dependent Kinases / Q000378:metabolism*; D016213:Cyclins / Q000378:metabolism*; D029721:Drosophila Proteins / Q000235:genetics / Q000378:metabolism*; D004331:Drosophila melanogaster / Q000502:physiology*; D006801:Humans; D008928:Mitochondria / Q000378:metabolism; D010100:Oxygen / Q000378:metabolism; D011393:Procollagen-Proline Dioxygenase / Q000235:genetics / Q000378:metabolism*; D011518:Proto-Oncogene Proteins
chemical_list: C534694:CycD protein, Drosophila; D056741:Cyclin D; D016213:Cyclins; D029721:Drosophila Proteins; D011518:Proto-Oncogene Proteins; C491512:Hif prolyl hydroxylase, Drosophila; D011393:Procollagen-Proline Dioxygenase; C495900:CDK4 protein, human; C495896:Cdk4 protein, Drosophila; D051358:Cyclin-Dependent Kinase 4; D018844:Cyclin-Dependent Kinases; D010100:Oxygen