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EFR3A, an Intriguing Gene, and Protein with a Scaffolding Function.

Magdalena Trybus1, Anita Hryniewicz-Jankowska2, Aleksander Czogalla2

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Summary
This summary is machine-generated.

Eighty-Five Requiring 3 (EFR3) proteins are poorly understood plasma membrane proteins involved in cell signaling and linked to human disorders. This review highlights EFR3A

Keywords:
EFR3PI4KAPKCmembrane raftsphosphatidyl inositol derivatives

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biochemistry

Background:

  • Eighty-Five Requiring 3 (EFR3) proteins are eukaryotic peripheral plasma membrane proteins belonging to the armadillo-like superfamily.
  • Two paralog genes, EFR3A and EFR3B, exist in higher vertebrates, each producing multiple protein isoforms.
  • EFR3 proteins are implicated in diverse physiological processes, including phototransduction, G protein-coupled receptors (GPCRs), and insulin receptor signaling.

Purpose of the Study:

  • To review the current understanding of EFR3 proteins, with a focus on EFR3A.
  • To explore the structural characteristics and known molecular functions of EFR3 proteins.
  • To discuss the implications of EFR3A in human disorders and its potential roles in cellular processes.

Main Methods:

  • This review synthesizes information from existing literature.
  • Structural data analysis reveals EFR3's superhelical rod-like structure with armadillo (ARM) repeats and a triple helical motif.
  • Functional analysis is based on reported interactions and physiological roles.

Main Results:

  • EFR3 proteins anchor the phosphatidylinositol 4-kinase A complex to the plasma membrane, vital for cell signaling.
  • EFR3A's interaction with flotillin-2 suggests a role in membrane raft domain organization.
  • Mutations in EFR3A are associated with neurological disorders, cardiovascular diseases, and various cancers.

Conclusions:

  • EFR3 proteins, particularly EFR3A, play critical roles in fundamental cellular processes and human health.
  • EFR3A's function in anchoring key signaling complexes and its involvement in membrane organization highlight its significance.
  • Further research into EFR3A is warranted due to its association with disease and its intriguing molecular functions.