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Fig. 3. Structure-function analysis of Kek1. (A) Schematic representation of the
different Kek1 constructs: SP, signal peptide; NT, N-terminal region; LRR,
Leucine-Rich Repeat domains; Ig, Immunoglobulin-like domain; TM, transmembrane
domain. The relative efficiencies of these truncated proteins to inhibit DER
signalling after overexpression in the follicle cells and the wing imaginal
discs are indicated. (B) In vitro association between Kek1 and DER. Sf9 cells
were infected with baculovirus encoding DER and co-infected with nothing (lane
1) or viruses encoding Myc-tagged versions of wild-type Kek1 (lane 4),
Kek1
LRR (lane 2), Kek1
Ig (lane 3). Lane 5 is a control with Sf9
infected with baculovirus encoding Kek1-Myc alone. Anti-DER and anti-Myc
immunoprecipitates, lane 1 and lane 2-5, respectively, were blotted with
anti-DER (upper panel) and then reprobed with anti-Myc (lower panel).