6533b7d8fe1ef96bd1269b1b

RESEARCH PRODUCT

Membrane insertion and topology of the translocon-associated protein (TRAP) gamma subunit

Luis Martínez-gilIsmael MingarroCarlos A. Martínez-garayManuel Bañó-poloBrayan Grau

subject

0301 basic medicineVesicle-associated membrane protein 8Receptors PeptideProtein subunitBiophysicsReceptors Cytoplasmic and NuclearBiologyEndoplasmic ReticulumTopologyBiochemistryGreen fluorescent protein03 medical and health sciencesN-linked glycosylationMembranes (Biologia)Membrane GlycoproteinsEndoplasmic reticulumCalcium-Binding ProteinsProteïnes de membranaMembrane ProteinsCell BiologyTransloconTransmembrane proteinProtein Subunits030104 developmental biologyHydrophobic and Hydrophilic InteractionsGamma subunit

description

Translocon-associated protein (TRAP) complex is intimately associated with the ER translocon for the insertion or translocation of newly synthesised proteins in eukaryotic cells. The TRAP complex is comprised of three single-spanning and one multiple-spanning subunits. We have investigated the membrane insertion and topology of the multiple-spanning TRAP-γ subunit by glycosylation mapping and green fluorescent protein fusions both in vitro and in cell cultures. Results demonstrate that TRAP-γ has four transmembrane (TM) segments, an Nt/Ct cytosolic orientation and that the less hydrophobic TM segment inserts efficiently into the membrane only in the cellular context of full-length protein.

yearjournalcountryeditionlanguage
2017-01-01
10.1016/j.bbamem.2017.01.027http://hdl.handle.net/10550/58014