Fig. 4. The localization of the PTPL1-FERM domain is altered by mutation of the two
potential PtdIns(4,5)P2-binding sites in COS1 cells. COS1
cells were transfected with (A) HA-epitope tagged wild-type FERM domain, (B)
KN1-FERM mutant (K645, 646, 647N), (C) KN2-FERM mutant (K824, 825, 830, 831,
832N) and (D) KN1-2-FERM mutant (combination of KN1 and KN2 mutations) and
treated for immunolocalization of HA-epitope tagged constructs as described in
Fig. 2. (A-C) Transfected
wild-type FERM domain, KN1 and KN2 mutants were associated with the plasma
membrane, dorsal microvilli and induced membrane extensions (arrowheads). (D)
KN1-2 mutant of FERM domain was mainly localized in the cytoplasm (arrowhead).
Bars, 10 µm.