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Synthesis of plasmalogens in eye lens epithelial cells.

Abstract
The present paper describes cloning and sequencing of the mouse cDNA encoding dihydroxyacetonephosphate acyltransferase (DAPAT), the peroxisomal key enzyme of plasmalogen (PM) biosynthesis. Using monospecific antibodies, we localized DAPAT and alkyl dihydroxyacetonephosphate synthase to peroxisomes of mouse lens epithelial cells (LECs) and determined their enzymatic activity. By electrospray ionization mass spectrometry of mouse lens lipid extracts, we identified phosphatidyl ethanolamine including plasmenyl ethanolamine species as major constituents. Our data demonstrate the capacity of LECs to synthesize PMs and the high coincidence between deficiency of PM and early manifestation of cataract in patients with peroxisomal disorders suggests that ether-bonded lipids may play an important role in maintaining lens transparency.
AuthorsT P Thai, C Rodemer, J Worsch, A Hunziker, K Gorgas, W W Just
JournalFEBS letters (FEBS Lett) Vol. 456 Issue 2 Pg. 263-8 (Aug 06 1999) ISSN: 0014-5793 [Print] England
PMID10456321 (Publication Type: Comparative Study, Journal Article, Research Support, Non-U.S. Gov't)
Chemical References
  • DNA, Complementary
  • Plasmalogens
  • Acyltransferases
  • glycerone-phosphate O-acyltransferase
  • Alkyl and Aryl Transferases
  • alkylglycerone-phosphate synthase
Topics
  • Acyltransferases (genetics, metabolism)
  • Alkyl and Aryl Transferases (metabolism)
  • Amino Acid Sequence
  • Animals
  • Base Sequence
  • Cataract (etiology, metabolism)
  • Cloning, Molecular
  • DNA, Complementary (genetics)
  • Epithelial Cells (metabolism, ultrastructure)
  • Humans
  • Lens, Crystalline (cytology, metabolism)
  • Mice
  • Microbodies (enzymology)
  • Microscopy, Electron
  • Molecular Sequence Data
  • Plasmalogens (biosynthesis)
  • Sequence Homology, Amino Acid
  • Species Specificity

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