Recombinant human dihydroxyacetonephosphate acyl-transferase characterization as an integral monotopic membrane protein

Biochem Biophys Res Commun. 2016 Dec 2;481(1-2):51-58. doi: 10.1016/j.bbrc.2016.11.019. Epub 2016 Nov 9.


Although the precise functions of ether phospholipids are still poorly understood, significant alterations in their physiological levels are associated either to inherited disorders or to aggressive metastatic cancer. The essential precursor, alkyl-dihydroxyacetone phosphate (DHAP), for all ether phospholipids species is synthetized in two consecutive reactions performed by two enzymes sitting on the inner side of the peroxisomal membrane. Here, we report the characterization of the recombinant human DHAP acyl-transferase, which performs the first step in alkyl-DHAP synthesis. By exploring several expression systems and designing a number of constructs, we were able to purify the enzyme in its active form and we found that it is tightly bound to the membrane through the N-terminal residues.

Keywords: Ether-phospholipids; Membrane protein; Peroxisomal disorder; Rhizomelic chondrodysplasia punctata.

MeSH terms

  • Acyltransferases / chemistry*
  • Acyltransferases / genetics
  • Acyltransferases / metabolism*
  • Binding Sites
  • HEK293 Cells
  • Humans
  • Membrane Proteins / chemistry
  • Membrane Proteins / metabolism*
  • Peroxisomes / metabolism*
  • Pichia / enzymology*
  • Pichia / genetics
  • Protein Binding
  • Recombinant Proteins / chemistry
  • Recombinant Proteins / metabolism


  • Membrane Proteins
  • Recombinant Proteins
  • Acyltransferases
  • glycerone-phosphate O-acyltransferase