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Updated: May 6, 2026

Methods to Study Mrp4-containing Macromolecular Complexes in the Regulation of Fibroblast Migration
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AAK1-mediated phosphorylation of PDLIM5 and Talin1 promotes focal adhesion disassembly to accelerate cell migration

Daniela Krocianova1, Alexander D Dagg2, Rory A Clayton2

  • 1Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Brno, Czech Republic.

Nature Communications
|May 4, 2026
PubMed

Insights

AAK1 and BMP2K are kinases involved in cell processes. This study identifies PDLIM5 and Talin1 as substrates, revealing AAK1

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biochemistry

Background:

  • AAK1 and BMP2K are serine/threonine kinases traditionally linked to clathrin-mediated endocytosis (CME).
  • Their broader cellular functions, particularly in relation to cell migration and focal adhesion dynamics, were not fully understood.

Purpose of the Study:

  • To identify novel substrates of AAK1 and BMP2K.
  • To elucidate the specific roles of AAK1 in cell migration and focal adhesion turnover.
  • To understand the mechanism of AAK1 substrate recognition and regulation.

Main Methods:

  • In silico screening using motif-guided approaches.
  • Biochemical assays to confirm kinase-substrate interactions.
  • Phosphoproteomic analysis to identify phosphorylation sites.
  • Live-cell imaging to observe protein dynamics in focal adhesions.
  • Analysis of phospho-mimetic and phospho-null mutants.

Main Results:

  • PDLIM5 and Talin1 were identified as direct substrates of AAK1 and BMP2K.
  • AAK1, but not BMP2K, was found to promote cell migration and focal adhesion (FA) turnover.
  • AAK1 localizes to FAs during their disassembly phase, facilitated by binding to PDLIM5 via its PDZ-binding motif.
  • AAK1-dependent phosphorylation of PDLIM5 and Talin1 promotes their timely release during FA disassembly.

Conclusions:

  • AAK1 plays a kinase-driven role in focal adhesion turnover, distinct from protease and phosphatase mechanisms.
  • The functional divergence between AAK1 and BMP2K offers a potential strategy for modulating cell migration independently of CME.
  • This study reveals novel substrates and mechanisms for AAK1 in regulating cell adhesion and migration.

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