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Sphingosine Kinases: Emerging Structure-Function Insights.

David R Adams1, Susan Pyne2, Nigel J Pyne2

  • 1Institute of Chemical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, Scotland, UK.

Trends in Biochemical Sciences
|March 30, 2016
PubMed
Summary
This summary is machine-generated.

Sphingosine kinases (SK) regulate cell functions. This review details SK1 structure, function, and regulation, proposing novel mechanisms for its activity and role in disease.

Keywords:
DAGK_catSK2)TRAF2diacylglycerol kinase (DGK)membrane curvaturesphingosine kinase (SK1

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Structural Biology

Background:

  • Sphingosine kinases (SK1 and SK2) are crucial enzymes converting sphingosine to sphingosine 1-phosphate.
  • These enzymes regulate fundamental cellular processes such as survival, proliferation, differentiation, migration, and immune function.

Purpose of the Study:

  • To review recent advances in the structural and functional characterization of Sphingosine Kinase 1 (SK1).
  • To contextualize SK1 findings with insights from related prokaryotic lipid kinases.
  • To propose novel regulatory mechanisms and understand SK1's role in physiology and disease.

Main Methods:

  • Analysis of crystal structures of SK1 and related prokaryotic lipid kinases.
  • Identification of potential protein-protein interaction sites.
  • Investigation of regulatory mechanisms including phosphorylation and interactions with lipids and proteins.

Main Results:

  • A putative dimerisation interface for SK1 was identified.
  • Novel regulatory mechanisms influencing SK1's structural plasticity were proposed.
  • Enzyme function and regulation appear dependent on conformational mobility.

Conclusions:

  • Structural and functional insights into SK1 are advancing.
  • Conformational flexibility is likely key to SK1's catalytic activity and regulation.
  • This work provides a framework for future research into SK1 in health and disease.