Endogenously tagged rab proteins: a resource to study membrane trafficking in Drosophila.
Membrane trafficking is key to the cell biological mechanisms underlying development. Rab GTPases control specific membrane compartments, from core secretory and endocytic machinery to less-well-understood compartments. We tagged all 27 Drosophila Rabs with YFP(MYC) at their endogenous chromosomal loci, determined their expression and subcellular localization in six tissues comprising 23 cell types, and provide this data in an annotated, searchable image database. We demonstrate the utility of these lines for controlled knockdown and show that similar subcellular localization can predict redundant functions. We exploit this comprehensive resource to ask whether a common Rab compartment architecture underlies epithelial polarity. Strikingly, no single arrangement of Rabs characterizes the five epithelia we examine. Rather, epithelia flexibly polarize Rab distribution, producing membrane trafficking architectures that are tissue- and stage-specific. Thus, the core machinery responsible for epithelial polarization is unlikely to rely on polarized positioning of specific Rab compartments.
Max Planck Institute of Molecular Cell Biology and Genetics, Dresden 01307, Germany.
Sebastian
S
Dunst
Max Planck Institute of Molecular Cell Biology and Genetics, Dresden 01307, Germany; HHMI Janelia Research Campus, Ashburn, VA 20147, USA.
Tom
T
Kazimiers
Max Planck Institute of Molecular Cell Biology and Genetics, Dresden 01307, Germany.
Felix
F
von Zadow
Max Planck Institute of Molecular Cell Biology and Genetics, Dresden 01307, Germany.
Helena
H
Jambor
Max Planck Institute of Molecular Cell Biology and Genetics, Dresden 01307, Germany; MRC National Institute for Medical Research, London NW7 1AA, UK.
Andreas
A
Sagner
Max Planck Institute of Molecular Cell Biology and Genetics, Dresden 01307, Germany; Paul Langerhans Institute, Dresden 01307, Germany.
Beate
B
Brankatschk
Max Planck Institute of Molecular Cell Biology and Genetics, Dresden 01307, Germany.
Ali
A
Mahmoud
Max Planck Institute of Molecular Cell Biology and Genetics, Dresden 01307, Germany.
Stephanie
S
Spannl
Max Planck Institute of Molecular Cell Biology and Genetics, Dresden 01307, Germany. Electronic address: tomancak@mpi-cbg.de.
Pavel
P
Tomancak
Max Planck Institute of Molecular Cell Biology and Genetics, Dresden 01307, Germany. Electronic address: eaton@mpi-cbg.de.
Suzanne
S
Eaton
Max Planck Institute of Molecular Cell Biology and Genetics, Dresden 01307, Germany. Electronic address: brankats@mpi-cbg.de.
Marko
M
Brankatschk
D000818:Animals; D002462:Cell Membrane / Q000378:metabolism*; D002465:Cell Movement / Q000502:physiology*; D004331:Drosophila melanogaster / Q000378:metabolism*; D004848:Epithelium / Q000378:metabolism; D055785:Gene Knockdown Techniques / Q000379:methods; D021381:Protein Transport / Q000235:genetics; D020691:rab GTP-Binding Proteins / Q000235:genetics / Q000378:metabolism*
D020691:rab GTP-Binding Proteins