title: Arf-like GTPases: not so Arf-like after all.
abstract: ADP-ribosylation factor (Arf) GTP-binding proteins are among the best-characterized members of the Ras superfamily of GTPases, with well-established functions in membrane-trafficking pathways. A recent watershed of genomic and structural information has identified a family of conserved related proteins: the Arf-like (Arl) GTPases. The best-characterized Arl protein, Arl2, regulates the folding of beta tubulin, and recent data suggest that Arl1 and Arf-related protein 1 (ARFRP1) are localized to the trans-Golgi network (TGN), where they function, in part, to regulate the tethering of endosome-derived transport vesicles. Other Arl proteins are localized to the cytosol, nucleus, cytoskeleton and mitochondria, which indicates that Arl proteins have diverse roles that are distinct from the known functions of traditional Arf GTPases.
authors.affiliation: Department of Cell and Developmental Biology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104-6058, USA. cburd@mail.med.upenn.edu
authors.forename: Christopher G
authors.initials: CG
authors.lastname: Burd
authors.forename: Todd I
authors.initials: TI
authors.lastname: Strochlic
authors.forename: Subba R Gangi
authors.initials: SR
authors.lastname: Setty
mesh_terms: D020727:ADP-Ribosylation Factors / Q000378:metabolism / Q000502:physiology*; D000818:Animals; D020558:GTP Phosphohydrolases / Q000378:metabolism / Q000502:physiology*; D006801:Humans; D008565:Membrane Proteins / Q000378:metabolism / Q000502:physiology*; D017433:Protein Structure, Secondary; D012441:Saccharomyces cerevisiae / Q000378:metabolism; D029701:Saccharomyces cerevisiae Proteins / Q000502:physiology
chemical_list: D008565:Membrane Proteins; D029701:Saccharomyces cerevisiae Proteins; C097313:ADP-ribosylation factor related proteins; D020558:GTP Phosphohydrolases; D020727:ADP-Ribosylation Factors