title: The immediate-early oncoproteins Fra-1, c-Fos, and c-Jun have distinguishable surface behavior and interactions with phospholipids.
abstract: This work explores the surface properties of the transcription factor Fra-1 and compares them with those of two other immediate early proteins, c-Fos and c-Jun, to establish generalities and differences in the surface behavior and interaction with phospholipids of this type of proteins. We present several experimental clues of the flexible nature of Fra-1, c-Fos, and c-Jun that support sequence-based predictions of their intrinsical disorder. The values of surface parameters for Fra-1 are similar in general to those of c-Fos and c-Jun. However, we find differences in the interactions of the three proteins with phospholipids. The closely related Fra-1 and c-Fos share affinity for anionic lipids but the former has more affinity for a condensed phase and senses a change in DPPC phase, while the latter has more affinity for an expanded phase. These features are in contrast with our previous finding that c-Jun is not selective for phospholipid polar head group or charge. We show here that at least some immediate early transcription factors can interact with membrane phospholipids in a distinguishable manner, and this shall provide a basis for their potential capacity to regulate membrane-mediated cellular processes.
authors.affiliation: Centro de Investigaciones en Química Biológica de Córdoba, (CIQUIBIC, UNC-CONICET), Departamento de Química Biológica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre y Medina Allende, Ciudad Universitaria, X5000HUA, Córdoba, República Argentina.
authors.forename: María Cecilia
authors.initials: MC
authors.lastname: Gaggiotti
authors.forename: Maximiliano
authors.initials: M
authors.lastname: Del Boca
authors.forename: Gonzalo
authors.initials: G
authors.lastname: Castro
authors.forename: Beatriz L
authors.initials: BL
authors.lastname: Caputto
authors.forename: Graciela A
authors.initials: GA
authors.lastname: Borioli
mesh_terms: D000327:Adsorption; D006801:Humans; D010743:Phospholipids / Q000378:metabolism; D016760:Proto-Oncogene Proteins c-fos / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D016755:Proto-Oncogene Proteins c-jun / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D013499:Surface Properties; D000099169:Fos-Related Antigen 1
chemical_list: D010743:Phospholipids; D016760:Proto-Oncogene Proteins c-fos; D016755:Proto-Oncogene Proteins c-jun; D000099169:Fos-Related Antigen 1