title: atonal regulates neurite arborization but does not act as a proneural gene in the Drosophila brain.
abstract: Drosophila atonal (ato) is the proneural gene of the chordotonal organs (CHOs) in the peripheral nervous system (PNS) and the larval and adult photoreceptor organs. Here, we show that ato is expressed at multiple stages during the development of a lineage of central brain neurons that innervate the optic lobes and are required for eclosion. A novel fate mapping approach shows that ato is expressed in the embryonic precursors of these neurons and that its expression is reactivated in third instar larvae (L3). In contrast to its function in the PNS, ato does not act as a proneural gene in the embryonic brain. Instead, ato performs a novel function, regulating arborization during larval and pupal development by interacting with Notch.
authors.affiliation: Howard Hughes Medical Institute, Department of Human and Molecular Genetics, Baylor College of Medicine, Houston, Texas 77030, USA.
authors.forename: B A
authors.initials: BA
authors.lastname: Hassan
authors.forename: N A
authors.initials: NA
authors.lastname: Bermingham
authors.forename: Y
authors.initials: Y
authors.lastname: He
authors.forename: Y
authors.initials: Y
authors.lastname: Sun
authors.forename: Y N
authors.initials: YN
authors.lastname: Jan
authors.forename: H Y
authors.initials: HY
authors.lastname: Zoghbi
authors.forename: H J
authors.initials: HJ
authors.lastname: Bellen
mesh_terms: D000818:Animals; D001369:Axons / Q000737:chemistry / Q000502:physiology; D051792:Basic Helix-Loop-Helix Proteins; D001921:Brain / Q000166:cytology / Q000254:growth & development; D002454:Cell Differentiation / Q000502:physiology; D019070:Cell Lineage / Q000502:physiology; D004268:DNA-Binding Proteins / Q000032:analysis / Q000235:genetics* / Q000378:metabolism*; D004330:Drosophila; D029721:Drosophila Proteins; D017952:Ganglia, Invertebrate / Q000166:cytology / Q000254:growth & development; D018507:Gene Expression Regulation, Developmental; D017403:In Situ Hybridization; D007814:Larva / Q000502:physiology; D008565:Membrane Proteins / Q000502:physiology; D009419:Nerve Tissue Proteins; D016501:Neurites / Q000737:chemistry* / Q000502:physiology*; D009474:Neurons / Q000737:chemistry / Q000502:physiology / Q000648:ultrastructure; D011679:Pupa / Q000502:physiology; D012333:RNA, Messenger / Q000032:analysis; D051880:Receptors, Notch; D013234:Stem Cells / Q000737:chemistry / Q000502:physiology / Q000648:ultrastructure; D014795:Visual Pathways / Q000737:chemistry / Q000166:cytology / Q000502:physiology
chemical_list: D051792:Basic Helix-Loop-Helix Proteins; D004268:DNA-Binding Proteins; D029721:Drosophila Proteins; D008565:Membrane Proteins; D009419:Nerve Tissue Proteins; D012333:RNA, Messenger; D051880:Receptors, Notch; C497759:N protein, Drosophila; C082142:ato protein, Drosophila