PIPSQUEAK, AN EARLY ACTING MEMBER OF THE POSTERIOR GROUP OF GENES, AFFECTS VASA LEVEL AND GERM CELL-SOMATIC CELL-INTERACTION IN THE DEVELOPING EGG CHAMBER
V. Siegel et al., PIPSQUEAK, AN EARLY ACTING MEMBER OF THE POSTERIOR GROUP OF GENES, AFFECTS VASA LEVEL AND GERM CELL-SOMATIC CELL-INTERACTION IN THE DEVELOPING EGG CHAMBER, Development, 119(4), 1993, pp. 1187-1202
We have identified a new member of the posterior group of genes, ,whic
h we call pipsqueak. We show that pipsqueak - acts after the establish
ment of the oskar posterior anchor but before the localization of vasa
protein during oogenesis. Characterization of multiple alleles at the
pipsqueak locus shows that pipsqueak, like vasa, is required for earl
y stages of oogenesis, including but not limited to formation of the e
gg chamber and progression through Stage 6 of oogenesis. Genetic inter
action studies suggest that pipsqueak acts at least partially through
vasa; molecular studies indicate that pipsqueak affects vasa level in
the ovary. We compare vasa and pipsqueak mutant phenotypes in order to
determine whether pipsqueak acts solely through vasa, and present a m
odel for the role of pipsqueak in posterior pattern formation.