title: WAFL, a new protein involved in regulation of early endocytic transport at the intersection of actin and microtubule dynamics.
abstract: We have previously identified a new gene with sequence homology to the WASP-family of actin regulators denoted WAFL (WASP and FKBP-like). Here we report a possible biological function for WAFL, by demonstrating an association to early endosomes via its central coiled-coil domain. Further we show by functional and structural studies that WAFL is associated with both microtubules and the actin filament system, the two means of transport of early endosomes. In addition, WAFL interacts with WASP-interacting protein (WIP) and actin, thus linking WAFL to actin dynamics. The use of RNAi depletion of WAFL shows that WAFL-deficient cells display delayed transport of endosomal cargo. Our findings are compatible with a model whereby WAFL is involved in the transport of early endosomes at the level of transition between microfilament-based and microtubule-based movement.
authors.affiliation: Strategic Research Center IRIS, Karolinska Institute, Stockholm, Sweden.
authors.forename: Ing-Marie
authors.initials: IM
authors.lastname: Viklund
authors.forename: Pontus
authors.initials: P
authors.lastname: Aspenström
authors.forename: Vannary
authors.initials: V
authors.lastname: Meas-Yedid
authors.forename: Bo
authors.initials: B
authors.lastname: Zhang
authors.forename: Jolanta
authors.initials: J
authors.lastname: Kopec
authors.forename: Daniel
authors.initials: D
authors.lastname: Agren
authors.forename: Gunter
authors.initials: G
authors.lastname: Schneider
authors.forename: Mauro
authors.initials: M
authors.lastname: D'Amato
authors.forename: Jean-Christophe
authors.initials: JC
authors.lastname: Olivo-Marin
authors.forename: Philippe
authors.initials: P
authors.lastname: Sansonetti
authors.forename: Guy Tran
authors.initials: GT
authors.lastname: Van Nhieu
authors.forename: Sven
authors.initials: S
authors.lastname: Pettersson
mesh_terms: D008841:Actin Cytoskeleton / Q000378:metabolism*; D000199:Actins / Q000378:metabolism*; D000818:Animals; D019086:Bridged Bicyclo Compounds, Heterocyclic / Q000378:metabolism; D004705:Endocytosis / Q000502:physiology*; D011992:Endosomes / Q000378:metabolism; D006367:HeLa Cells; D006801:Humans; D051379:Mice; D008870:Microtubules / Q000378:metabolism*; D017434:Protein Structure, Tertiary; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000378:metabolism; D022021:Tacrolimus Binding Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D053778:Thiazolidines / Q000378:metabolism; D051300:Wiskott-Aldrich Syndrome Protein Family / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D051317:Wiskott-Aldrich Syndrome Protein, Neuronal / Q000235:genetics / Q000378:metabolism
chemical_list: D000199:Actins; D019086:Bridged Bicyclo Compounds, Heterocyclic; C512703:FKBP133 protein, mouse; C540489:FKBP15 protein, human; D011993:Recombinant Fusion Proteins; D053778:Thiazolidines; D051300:Wiskott-Aldrich Syndrome Protein Family; D051317:Wiskott-Aldrich Syndrome Protein, Neuronal; D022021:Tacrolimus Binding Proteins; C037067:latrunculin A