title: c-Jun interacts with phospholipids and c-Fos at the interface.
abstract: We describe c-Jun, a widely studied transcription factor that participates in cell proliferation, differentiation, and tumorigenesis, as amphitropic. We show that c-Jun forms stable monolayers and interacts favorably, although in a nonselective manner, with phospholipids at the interface. The surface activity of c-Jun, together with that of c-Fos, its common partner in AP-1 transcription heterodimers, drives interfacial complex formation. We show that AP-1 is very stable at the air-water interface and suggest that AP-1 may not be substantially formed in solution as a stable equimolar association of both proteins.
authors.affiliation: CIQUIBIC, Departamento de Química Biológica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Pabellón Argentina, Ciudad Universitaria, 5000 Córdoba, Argentina.
authors.forename: Maximiliano
authors.initials: M
authors.lastname: Del Boca
authors.forename: Beatriz L
authors.initials: BL
authors.lastname: Caputto
authors.forename: Bruno
authors.initials: B
authors.lastname: Maggio
authors.forename: Graciela A
authors.initials: GA
authors.lastname: Borioli
mesh_terms: D001667:Binding, Competitive; D010743:Phospholipids / Q000737:chemistry*; D011485:Protein Binding; D016760:Proto-Oncogene Proteins c-fos / Q000737:chemistry*; D016755:Proto-Oncogene Proteins c-jun / Q000737:chemistry*; D013499:Surface Properties; D018808:Transcription Factor AP-1 / Q000737:chemistry*
chemical_list: D010743:Phospholipids; D016760:Proto-Oncogene Proteins c-fos; D016755:Proto-Oncogene Proteins c-jun; D018808:Transcription Factor AP-1