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Updated: Apr 20, 2026

A High-Throughput Enzyme-Coupled Activity Assay to Probe Small Molecule Interaction with the dNTPase SAMHD1
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The eukaryotic elongation factor eEF1A1 interacts with SAMHD1.

Catherine Morrissey1, David Schwefel2, Valerie Ennis-Adeniran2

  • 1*Genetic Medicine, University of Manchester, Manchester Academic Health Science Centre, Central Manchester Foundation Trust University Hospitals, Manchester M13 9PT, U.K.

The Biochemical Journal
|November 26, 2014
PubMed
Summary
This summary is machine-generated.

Researchers identified eukaryotic elongation factor 1A1 (eEF1A1) as a protein interacting with SAMHD1, a key factor in Aicardi-Goutières syndrome and HIV-1 restriction. This interaction may regulate SAMHD1 stability and function.

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Analysis of SAMHD1 Restriction by Flow Cytometry in Human Myeloid U937 Cells
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Area of Science:

  • Molecular Biology
  • Immunology
  • Virology

Background:

  • Mutations in SAMHD1 cause Aicardi-Goutières syndrome (AGS), a disease overlapping with congenital viral infections.
  • SAMHD1 functions as an HIV-1 restriction factor, inhibiting viral replication in immune cells via its triphosphohydrolase activity.

Purpose of the Study:

  • To identify proteins interacting with SAMHD1 to understand AGS pathogenesis.
  • To elucidate the regulatory mechanisms of SAMHD1, including its role in dNTP regulation and HIV-1 restriction.

Main Methods:

  • Yeast two-hybrid screening
  • Pull-down assays followed by mass spectrometry (MS)
  • Co-immunoprecipitation
  • Proximity ligation assay (PLA)

Main Results:

  • Identified eukaryotic elongation factor 1A1 (eEF1A1) as a SAMHD1 interaction partner.
  • Confirmed the interaction using co-immunoprecipitation and PLA.
  • Observed enhanced SAMHD1-eEF1A1 interaction in mutant SAMHD1 cell lines.

Conclusions:

  • eEF1A1 may mediate SAMHD1 turnover by targeting it for proteasomal degradation.
  • The SAMHD1-eEF1A1 interaction offers insights into AGS and HIV-1 restriction mechanisms.