Abstract
Accumulating evidence suggests that integrin recycling regulates cell migration. However, the lack of reagents to selectively target the trafficking of individual heterodimers, as opposed to endocytic transport as a whole, has made it difficult to define the contribution made by particular recycling pathways to directional cell movement. We show that autophosphorylation of protein kinase D1 (PKD1) at Ser(916) is necessary for its association with alphavbeta3 integrin. Expression of PKD1(916A) or the use of mutants of beta3 that do not bind to PKD1 selectively inhibits short-loop, Rab4-dependent recycling of alphavbeta3, and this suppresses the persistence of fibroblast migration. However, we report that short-loop recycling does not directly contribute to fibroblast migration by moving alphavbeta3 to the cell front, but by antagonizing alpha5beta1 recycling, which, in turn, influences the cell's decision to migrate with persistence or to move randomly.
MeSH Terms
Animals
COS Cells
Cell Movement/genetics
Chlorocebus aethiops
Endocytosis/genetics
Fibroblasts/cytology,metabolism
Gene Expression
Integrin alpha5beta1/genetics,metabolism
Integrin alphaVbeta3/genetics,metabolism
Intracellular Signaling Peptides and Proteins/genetics,metabolism
Mice
Mutation, Missense
NIH 3T3 Cells
Phosphorylation
Protein Binding/genetics
Protein Kinase C/genetics,metabolism
Protein Serine-Threonine Kinases/genetics,metabolism
Protein Transport/genetics
Signal Transduction/genetics
rab4 GTP-Binding Proteins/genetics,metabolism
rho-Associated Kinases
Chemicals
Integrin alpha5beta1
Integrin alphaVbeta3
Intracellular Signaling Peptides and Proteins
protein kinase D
Protein Serine-Threonine Kinases
rho-Associated Kinases
Protein Kinase C
rab4 GTP-Binding Proteins
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
White Dominic P
Integrin Cell Biology Laboratory, Beatson Institute for Cancer Research, Bearsden, Glasgow, Scotland, UK.
Caswell Patrick T
Norman Jim C
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