Thirty-one flavors of Drosophila rab proteins.
Rab proteins are small GTPases that play important roles in transport of vesicle cargo and recruitment, association of motor and other proteins with vesicles, and docking and fusion of vesicles at defined locations. In vertebrates, >75 Rab genes have been identified, some of which have been intensively studied for their roles in endosome and synaptic vesicle trafficking. Recent studies of the functions of certain Rab proteins have revealed specific roles in mediating developmental signal transduction. We have begun a systematic genetic study of the 33 Rab genes in Drosophila. Most of the fly proteins are clearly related to specific vertebrate proteins. We report here the creation of a set of transgenic fly lines that allow spatially and temporally regulated expression of Drosophila Rab proteins. We generated fluorescent protein-tagged wild-type, dominant-negative, and constitutively active forms of 31 Drosophila Rab proteins. We describe Drosophila Rab expression patterns during embryogenesis, the subcellular localization of some Rab proteins, and comparisons of the localization of wild-type, dominant-negative, and constitutively active forms of selected Rab proteins. The high evolutionary conservation and low redundancy of Drosophila Rab proteins make these transgenic lines a useful tool kit for investigating Rab functions in vivo.
Zhang
Jun
J
Department of Developmental Biology, Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, California 94305, USA.
Schulze
Karen L
KL
Hiesinger
P Robin
PR
Suyama
Kaye
K
Wang
Stream
S
Fish
Matthew
M
Acar
Melih
M
Hoskins
Roger A
RA
Bellen
Hugo J
HJ
Scott
Matthew P
MP
D000818:Animals; D004247:DNA / Q000235:genetics / Q000302:isolation & purification; D004330:Drosophila / Q000235:genetics*; D029721:Drosophila Proteins / Q000235:genetics*; D005810:Multigene Family; D016133:Polymerase Chain Reaction; D011994:Recombinant Proteins / Q000378:metabolism; D014162:Transfection; D020691:rab GTP-Binding Proteins / Q000235:genetics*
D029721:Drosophila Proteins; D011994:Recombinant Proteins; D004247:DNA; D020691:rab GTP-Binding Proteins