title: A role for endocytic recycling in hyphal growth.
abstract: Actin plays multiple complex roles in cell growth and cell shape. Recently it was demonstrated that actin patches, which represent sites of endocytosis, are present in a sub-apical collar at growing tips of hyphae and germ tubes of filamentous fungi. It is now clear that this zone of endocytosis is necessary for filamentous growth to proceed. In this review evidence for the role of these endocytic sites in hyphal growth is examined. One possibility if that the role of the sub-apical collar is associated with endocytic recycling of polarized material at the hyphal tip. The 'Apical Recycling Model' accounts for this role and predicts the need for a balance between endocytosis and exocytosis at the hyphal tip to control growth and cell shape. Other cell differentiation events, including appressorium formation and Aspergillus conidiophore development may also be explained by this model.
authors.affiliation: Program for the Biology of Filamentous Fungi, Department of Plant Pathology and Microbiology, 2132 TAMU, Texas A&M University, College Station, TX 2132, USA. bdshaw@tamu.edu
authors.forename: Brian D
authors.initials: BD
authors.lastname: Shaw
authors.forename: Da-Woon
authors.initials: DW
authors.lastname: Chung
authors.forename: Chih-Li
authors.initials: CL
authors.lastname: Wang
authors.forename: Laura A
authors.initials: LA
authors.lastname: Quintanilla
authors.forename: Srijana
authors.initials: S
authors.lastname: Upadhyay
mesh_terms: D004705:Endocytosis; D005089:Exocytosis; D005656:Fungal Proteins / Q000235:genetics / Q000378:metabolism*; D005658:Fungi / Q000235:genetics / Q000254:growth & development / Q000378:metabolism*; D025301:Hyphae / Q000235:genetics / Q000254:growth & development* / Q000378:metabolism
chemical_list: D005656:Fungal Proteins