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dc.creatorLyberopoulou, A.en
dc.creatorVenieris, E.en
dc.creatorMylonis, I.en
dc.creatorChachami, G.en
dc.creatorPappas, I.en
dc.creatorSimos, G.en
dc.creatorBonanou, S.en
dc.creatorGeorgatsou, E.en
dc.date.accessioned2015-11-23T10:38:15Z
dc.date.available2015-11-23T10:38:15Z
dc.date.issued2007
dc.identifier10.1159/000110460
dc.identifier.issn1015-8987
dc.identifier.urihttp://hdl.handle.net/11615/30448
dc.description.abstractHIF-1 alpha is the inducible subunit of the dimeric transcription factor HIF-1 (Hypoxia Inducible Factor 1). It is induced by hypoxia and hypoxia-mimetics in most cell types, as well as non-hypoxic signals such as growth factors, cytokines and oncogenes, often in a cell specific manner. HIF-1 is present in virtually all cells of higher eukaryotes and its function is of great biomedical relevance since it is highly involved in development, tumor progression and tissue ischemia. Intracellular signaling to HIF-1 alpha, as well as its further action, involves its participation in numerous protein complexes. Using the yeast two-hybrid system we have identified MgcRacGAP (male germ cell Rac GTPase Activating Protein) as a HIF-1 alpha interacting protein. The MgcRacGAP protein is a regulator of Rho proteins, which are principally involved in cytoskeletal organization. We have verified specific binding of HIF-1 alpha and MgcRacGAP in vitro and in vivo in mammalian cells. We have additionally shown that MgcRacGAP overexpression inhibits HIF-1 alpha transcriptional activity, without lowering HIF-1 alpha protein levels, or altering its subcellular localization. Moreover, this inhibition is dependent on the MgcRacGAP domain that interacts with HIF-1 alpha. In conclusion, our findings demonstrate that HIF-1 alpha function is negatively affected by its interaction with MgcRacGAP. Copyright (C) 2007 S. Karger AG, Basel.en
dc.sourceCellular Physiology and Biochemistryen
dc.source.uri<Go to ISI>://WOS:000251098700031
dc.subjecthypoxia inducible factor 1en
dc.subjectHIF-1 alphaen
dc.subjectMgcRacGAPen
dc.subjectMyo domainen
dc.subjectGTPaseen
dc.subjectactivating proteinsen
dc.subjectGAPen
dc.subjectHYPOXIA-INDUCIBLE FACTORen
dc.subjectGTPASE-ACTIVATING PROTEINen
dc.subjectSMOOTH-MUSCLE-CELLSen
dc.subjectGENE-EXPRESSIONen
dc.subjectHIF-ALPHAen
dc.subjectMITOTIC SPINDLEen
dc.subjectUP-REGULATIONen
dc.subjectRHO FAMILYen
dc.subjectCYTOKINESISen
dc.subjectHYDROXYLATIONen
dc.subjectCell Biologyen
dc.subjectPhysiologyen
dc.titleMgcRacGAP interacts with HIF-1 alpha and regulates its transcriptional activityen
dc.typejournalArticleen


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