| http://purl.uniprot.org/citations/19251694 | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | http://purl.uniprot.org/core/Journal_Citation |
| http://purl.uniprot.org/citations/19251694 | http://www.w3.org/2000/01/rdf-schema#comment | "A critical mediator of the cellular response to hypoxia is hypoxia-inducible factor 1 (HIF-1). Increased levels of HIF-1alpha are often associated with increased tumor metastasis, therapeutic resistance, and poorer prognosis. We recently identified a novel interaction between HIF-1alpha and the mammalian septin family member, SEPT9_v1. Septins are a highly conserved family of GTP-binding cytoskeletal proteins that are implicated in multiple cellular functions, including cell division and oncogenesis. SEPT9_v1 binds and stabilizes HIF-1alpha protein and stimulates HIF-1 transcriptional activity. SEPT9_v1-HIF-1 activation promotes tumor growth and angiogenesis. The structural and functional relationships between SEPT9_v1 and HIF-1alpha were analyzed. We found that SEPT9_v1 binds specifically with HIF-1alpha but not with HIF-2alpha. The GTPase domain of SEPT9_v1 was identified as essential for HIF-1alpha binding. A GTPase domain-derived polypeptide, corresponding to amino acids 252-379, was able to disrupt HIF-1alpha-SEPT9_v1 interaction and to inhibit HIF-1 transcriptional activity. SEPT9_v1 also protected HIF-1alpha from degradation induced by HSP90 inhibition by preventing the interaction of HIF-1alpha with the RACK1 protein, which promotes its oxygen-independent proteasomal degradation. In conclusion, a new mechanism of oxygen-independent activation of HIF-1 has been identified that is mediated by SEPT9_v1 blockade of RACK1 activity on HIF-1alpha degradation."xsd:string |
| http://purl.uniprot.org/citations/19251694 | http://purl.org/dc/terms/identifier | "doi:10.1074/jbc.m808348200"xsd:string |
| http://purl.uniprot.org/citations/19251694 | http://purl.uniprot.org/core/author | "Wang R."xsd:string |
| http://purl.uniprot.org/citations/19251694 | http://purl.uniprot.org/core/author | "Simons J.W."xsd:string |
| http://purl.uniprot.org/citations/19251694 | http://purl.uniprot.org/core/author | "Amir S."xsd:string |
| http://purl.uniprot.org/citations/19251694 | http://purl.uniprot.org/core/author | "Mabjeesh N.J."xsd:string |
| http://purl.uniprot.org/citations/19251694 | http://purl.uniprot.org/core/date | "2009"xsd:gYear |
| http://purl.uniprot.org/citations/19251694 | http://purl.uniprot.org/core/name | "J Biol Chem"xsd:string |
| http://purl.uniprot.org/citations/19251694 | http://purl.uniprot.org/core/pages | "11142-11151"xsd:string |
| http://purl.uniprot.org/citations/19251694 | http://purl.uniprot.org/core/title | "SEPT9_v1 up-regulates hypoxia-inducible factor 1 by preventing its RACK1-mediated degradation."xsd:string |
| http://purl.uniprot.org/citations/19251694 | http://purl.uniprot.org/core/volume | "284"xsd:string |
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