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Mapping the Phospho-dependent ALK Interactome to Identify Novel Components in ALK Signaling.

Farzaneh Aboualizadeh1, Zhong Yao1, Jikui Guan2

  • 1Donnelly Centre, University of Toronto, Ontario, Canada.

Journal of Molecular Biology
|October 4, 2021
PubMed
Summary

Researchers mapped protein interactions in Anaplastic Lymphoma Kinase (ALK) signaling using the Mammalian Membrane Two-Hybrid system. They identified 30 novel ALK interactors, many dependent on ALK phosphorylation, offering new therapeutic targets.

Keywords:
ALKMaMTHSH2protein–protein interactionreceptor tyrosine kinases

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Area of Science:

  • Molecular Biology
  • Cell Signaling
  • Oncology

Background:

  • Protein-protein interactions (PPIs) are crucial for Anaplastic Lymphoma Kinase (ALK) signaling pathways.
  • Understanding ALK interactors can reveal novel signaling mechanisms and potential therapeutic targets for ALK-related diseases.

Purpose of the Study:

  • To systematically map the phospho-dependent ALK interactome using a high-throughput screening method.
  • To identify novel proteins that interact with ALK in a phosphorylation-dependent manner.

Main Methods:

  • Utilized the Mammalian Membrane Two-Hybrid (MaMTH) system for large-scale screening.
  • Screened a library of 86 SH2 domain-containing proteins for interactions with ALK.
  • Validated specific interactions using co-immunoprecipitation in neuroblastoma cells.

Main Results:

  • Identified 30 novel ALK interactors.
  • Demonstrated that many identified interactions are modulated by ALK phosphorylation activity, with oncogenic mutations potentiating and inhibitors attenuating interactions.
  • Confirmed the functional interaction between ALK and NCK2, showing changes in NCK2 tyrosine phosphorylation upon modulation of ALK activity.

Conclusions:

  • The study provides a comprehensive resource of novel ALK interactors.
  • The identified interactome offers insights into phospho-dependent ALK signaling.
  • These findings may facilitate the development of novel therapeutic strategies targeting ALK-driven cancers.