A conserved sequence in caveolin-1 is both necessary and sufficient for caveolin polarity and cell directional migration.
Caveolin-1 (Cav-1) plays an important role in the organization of signaling molecules involved in a variety of signaling pathways, including those mediating cell motility. Here we show that amino acids K47-K57 of Cav-1 are a highly conserved sequence in Cav-1 and Cav-3 proteins, and that expression of either K47-K57 deletion Cav-1 mutant or wild-type Cav-2 that lacks this sequence exhibits a non-polarized distribution pattern. Expression of K47-K57 in Cav-2 leads to Cav-2 polarity, suggesting that expression of K47-K57 is sufficient to direct caveolin polarity. Importantly, we show that expression of this sequence is both necessary and sufficient to promote cell directional migration. Thus, our results support the conclusion that Cav-1 polarity is critical for cell directional migration.
Sun
Xing-Hui
XH
Mary Babb Randolph Cancer Center, West Virginia University, Morgantown, WV 26506, USA.
Liu
Zi-Yang
ZY
Chen
Hong
H
Beardsley
Andrew R
AR
Qi
Qi
Q
Liu
Jun
J
D000595:Amino Acid Sequence; D000818:Animals; D015153:Blotting, Western; D051242:Caveolin 1 / Q000235:genetics / Q000378:metabolism*; D051243:Caveolin 2 / Q000235:genetics / Q000378:metabolism*; D002465:Cell Movement; D002478:Cells, Cultured; D017124:Conserved Sequence / Q000235:genetics; D004622:Embryo, Mammalian / Q000166:cytology; D005347:Fibroblasts / Q000166:cytology / Q000378:metabolism*; D049452:Green Fluorescent Proteins / Q000235:genetics / Q000378:metabolism; D051379:Mice; D018345:Mice, Knockout; D018613:Microscopy, Confocal; D008969:Molecular Sequence Data; D009154:Mutation; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000378:metabolism; D017386:Sequence Homology, Amino Acid
D051242:Caveolin 1; D051243:Caveolin 2; D011993:Recombinant Fusion Proteins; D049452:Green Fluorescent Proteins